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The most-used calculators on CalcBritain, updated as the tax year moves on.
Take-Home Pay Calculator
Your net salary after income tax, National Insurance, pension and student loan — England, Scotland, Wales & NI.
Mortgage Affordability Calculator
How much you could borrow based on income, deposit and outgoings — with a stress test.
Stamp Duty Calculator
SDLT (England & NI), LBTT (Scotland) and LTT (Wales) — first-time buyer relief and surcharges.
Mortgage Repayment Calculator
Monthly payments, total interest and a full amortisation schedule — plus overpayment savings.
Pension Calculator
Tax relief on contributions plus a projection of your pension pot and retirement income.
Savings & ISA Calculator
Compound interest with regular contributions, and ISA tax-free growth vs a taxable account.
Income Tax Calculator
See your Income Tax and National Insurance broken down band by band, for England, Scotland, Wales and Northern Ireland.
Council Tax Calculator
See your annual and monthly Council Tax from your band (A-H) and your council's Band D amount.
Fresh off the press
Our newest calculators, built and checked against the latest rates.
Salary Comparison Calculator
Compare two job offers side by side — bonus, overtime, employer pension and commute costs, on both gross and net pay.
Savings Goal Calculator
Set a target — a holiday, a house deposit, an emergency fund — and see exactly what to save each month to get there.
Mortgage Deal Comparison Calculator
Compare 2 or more mortgage offers by rate, fees and cashback over your chosen comparison period — see the true cost of each deal and which one wins.
Coffee Cost Calculator
What your daily bought-coffee habit really costs a year — plus what home-brewing or investing the saving could be worth.
House Deposit Saver Calculator
How to save for a house deposit — time to target, the Lifetime ISA boost, and how much saving a bit more each month could save you.
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England, Scotland, Wales and Northern Ireland — including Scottish income tax bands and LBTT/LTT.
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The complete list — grouped the way you think about it.
Finance & Tax
Take-Home Pay Calculator
Your net salary after income tax, National Insurance, pension and student loan — England, Scotland, Wales & NI.
OpenMortgage Affordability Calculator
How much you could borrow based on income, deposit and outgoings — with a stress test.
OpenMortgage Repayment Calculator
Monthly payments, total interest and a full amortisation schedule — plus overpayment savings.
OpenStamp Duty Calculator
SDLT (England & NI), LBTT (Scotland) and LTT (Wales) — first-time buyer relief and surcharges.
OpenPension Calculator
Tax relief on contributions plus a projection of your pension pot and retirement income.
OpenSavings & ISA Calculator
Compound interest with regular contributions, and ISA tax-free growth vs a taxable account.
OpenSavings Goal Calculator
Set a target — a holiday, a house deposit, an emergency fund — and see exactly what to save each month to get there.
OpenVAT Calculator
Add or remove UK VAT at 20% or 5% — see the net, the VAT and the gross in one go.
OpenIncome Tax Calculator
See your Income Tax and National Insurance broken down band by band, for England, Scotland, Wales and Northern Ireland.
OpenSalary Calculator
Convert a salary between annual, monthly, weekly, daily and hourly pay, see the net figure, and calculate pro-rata for part-time hours.
OpenSelf-Employed Tax Calculator
Work out Income Tax and Class 4 National Insurance on your sole-trader profit, plus voluntary Class 2 NI.
OpenDividend Tax Calculator
Work out the tax on your dividend income using the £500 Dividend Allowance and basic/higher/additional rates.
OpenCapital Gains Tax Calculator
Estimate your Capital Gains Tax on property or other assets at the 18%/24% rates, after the £3,000 exempt amount.
OpenInheritance Tax Calculator
Estimate IHT due on an estate — nil-rate band, residence nil-rate band, transferable allowances and charity relief.
OpenCouncil Tax Calculator
See your annual and monthly Council Tax from your band (A-H) and your council's Band D amount.
OpenChild Benefit Calculator
Work out your Child Benefit and any High Income Child Benefit Charge if the higher earner earns over £60,000.
OpenStatutory Sick Pay Calculator
Work out how much SSP you're owed — after the 3 waiting days, up to the 28-week maximum, at the 2025/26 rate.
OpenStatutory Maternity Pay Calculator
See your SMP over the full 39 paid weeks — 90% of average weekly earnings, then the standard rate.
OpenRedundancy Pay Calculator
Work out your statutory redundancy payment from your age, years of service and weekly pay.
OpenMinimum Wage Calculator
See your hourly, weekly, monthly and annual gross pay at the correct NLW/NMW rate for your age.
OpenPersonal Loan Calculator
Monthly repayments, total interest and total cost on a fixed-rate personal loan.
OpenCompound Interest Calculator
See how a lump sum and monthly contributions grow over time — final balance, total contributions and interest earned.
OpenCredit Card Payoff Calculator
How long it takes to clear a credit card balance and the interest cost — minimum payments vs a fixed monthly amount.
OpenDebt Payoff Calculator
Compare the debt snowball and avalanche strategies across up to 6 debts — months to debt-free and interest saved.
OpenOvertime Pay Calculator
Your weekly, monthly and annual pay including overtime at 1.25x, 1.5x or 2x.
OpenInflation Calculator
What an amount of money from one year is worth in another, using UK CPI.
OpenNet Worth Calculator
Total assets minus total liabilities — cash, property, investments and pension vs mortgage, loans and debts.
OpenBudget Planner
Split your monthly income into needs, wants and savings and compare it to the 50/30/20 rule.
OpenBalance Transfer Savings Calculator
See how much a 0% balance transfer card saves vs staying put, and the monthly payment you need to clear it before the deal ends.
OpenLoan Early Repayment Calculator
Work out if settling your loan early beats running to term once the Early Repayment Charge is included — or how much extra payments save.
OpenOverdraft Cost Calculator
What your overdraft actually costs at 39.9% EAR — monthly and annual — versus a low-rate loan or 0% money-transfer card.
OpenBNPL Cost Calculator
Your real monthly Buy Now Pay Later commitment across every active plan, plus what a missed payment costs.
OpenDebt Consolidation Calculator
Compare your current debts' monthly payment and total interest against a consolidation loan — with an honest warning if a lower monthly payment means paying more overall.
OpenCredit Utilisation Calculator
See your per-card and overall credit utilisation, banding guidance, and exactly how much to pay down to reach 25%.
OpenCar Finance Early Settlement Calculator
Work out your equity position on a PCP or HP agreement, and when Voluntary Termination becomes available under the Consumer Credit Act.
OpenInterest-Only vs Repayment Calculator
Compare interest-only against repayment — monthly payment, total interest, and the balance still owed at the end of the term.
OpenPart-Time Hours Calculator
See what dropping to fewer hours or a 4-day week really does to your take-home pay — because progressive tax means it costs less than it looks.
OpenTax Code Checker
Decode your PAYE tax code, see your implied Personal Allowance, and spot red flags like BR/D0/D1 on your only job.
OpenState Pension Top-Up Calculator
Should you buy back missing National Insurance years? See the cost, extra State Pension for life, and the break-even point.
OpenSalary Sacrifice Calculator
See the real net cost of salary sacrifice into your pension vs a standard personal contribution — tax, employee NI and employer NI.
OpenSide Hustle Tax Calculator
Work out tax on side-hustle income using the £1,000 trading allowance and your marginal tax rate — plus whether you need to file.
OpenStudent Loan Repayment Calculator
Your monthly and annual student loan repayment, years to clear vs write-off, and an honest verdict on whether overpaying is worth it — Plan 1, 2, 4, 5 and Postgraduate.
OpenChildcare Costs & Support Calculator
Your real childcare cost after Tax-Free Childcare's 20% top-up and free hours — plus a £100,000 income-cliff warning.
OpenUniversity Parental Contribution Calculator
The means-tested Maintenance Loan your child at university actually gets, and the parental contribution gap it implies.
OpenPension vs ISA Calculator
Compare the same monthly amount in a pension (grossed up, 25% tax-free lump sum) against an ISA — including employer match.
OpenWork From Home Costs Calculator
Work out the real net saving (or cost) of a work-from-home day — commute, lunch and coffee saved vs extra heating and electricity — plus HMRC's £6/week relief.
OpenTrue Hourly Rate Calculator
Work out your TRUE hourly rate after unpaid overtime, commute and work costs (salary) or unbillable time, holidays and costs (freelance) — not just the headline figure.
OpenPay Rise Real-Terms Calculator
Work out whether your pay rise is a genuine real-terms gain or a hidden pay cut once CPI inflation is accounted for, plus the net monthly gain in your pocket.
Open£100k Tax Trap Calculator
See your Personal Allowance taper, the £100k-£125,140 60% marginal-rate trap, the childcare cliff-edge, and the pension contribution that can escape it.
OpenRent-a-Room Calculator
Work out your tax-free lodger income under the £7,500 Rent-a-Room Scheme, compare relief vs the normal expenses method, and see the Council Tax impact.
OpenSave Money
Coffee Cost Calculator
What your daily bought-coffee habit really costs a year — plus what home-brewing or investing the saving could be worth.
OpenHabit Cost Calculator
What any recurring habit really costs — weekly, annually and over 10 years — and what investing the saving instead could grow to.
OpenSmoking Cost Calculator
What smoking really costs you a year and over a lifetime — plus what quitting and investing the money instead could be worth.
OpenVaping vs Smoking Calculator
Compare what you spend on smoking against switching to vaping and see your annual saving, plus what investing it could grow to.
OpenMeal Deal vs Packed Lunch Calculator
Compare the annual cost of a bought lunch, a supermarket meal deal and a packed lunch — see how much switching could save you a year.
OpenTakeaway Cost Calculator
Work out what ordering takeaway costs you a year vs cooking at home, how much you pay in delivery fees, and whether a subscription is worth it.
OpenAlcohol Cost Calculator
Work out what drinking at the pub or at home costs you a year, your rough weekly units against the NHS guideline, and the saving from cutting back.
OpenLottery Cost Calculator
Work out how much playing Lotto or EuroMillions costs over the years, the jackpot odds, and an illustrative long-run expected return.
OpenSubscription Audit Calculator
List your subscriptions, mark which to cancel, and see the real monthly and annual total — plus an invested-instead projection.
OpenBottled Water Cost Calculator
See what bottled water really costs a year vs tap water or a filter jug, and the invested-instead saving.
OpenDaily Savings Invested Calculator
See what saving a daily amount could grow into over 10, 20, 30 or 40 years if invested.
OpenGym Cost Per Visit Calculator
Work out your real cost per gym visit and compare it against pay-as-you-go and budget gym pricing.
OpenCostco Fuel Savings Calculator
Is a Costco membership worth it just for cheaper fuel? Gross saving, detour cost, net saving and break-even.
OpenSupermarket Fuel Comparison Calculator
Is driving to a cheaper petrol station actually worth it once the detour's fuel cost is included?
OpenWarehouse Membership Worth It Calculator
Does a Costco (or similar) membership fee pay for itself through cheaper bulk shopping and any fuel add-on?
OpenLoyalty Points Value Calculator
What Tesco Clubcard, Nectar or Boots points are really worth in cash, at base and boosted rates.
OpenCashback Credit Card Calculator
See what a cashback credit card is really worth after fees — plus why it only pays off if you clear the balance in full.
OpenBulk Buying Savings Calculator
Compare a small pack against a bulk pack and see the real annual saving — including a waste warning for perishables.
OpenUnit Price Comparison Calculator
Compare 2-4 products by price per 100g, per 100ml or per item and find the genuinely cheapest option.
OpenCost Per Wear Calculator
Divide an item's price by how many times you'll wear it to see its real value — plus wears needed to hit a target.
OpenHouse Deposit Saver Calculator
How to save for a house deposit — time to target, the Lifetime ISA boost, and how much saving a bit more each month could save you.
OpenLifetime ISA Calculator
Your Lifetime ISA bonus, projected pot, and the real cash cost of an early withdrawal penalty.
OpenRegular Savings Drip Calculator
The real interest a regular saver earns you over 12 months — not the misleading headline-rate figure.
OpenEmergency Fund Calculator
Your emergency fund target from real essential outgoings, the gap to your savings, and how long it takes to build.
OpenPremium Bonds Odds Calculator
Expected and median annual Premium Bonds winnings, your odds of winning anything this month, and a tax-aware comparison against a savings account.
OpenSavings Rate Switch Calculator
See what the savings loyalty penalty is costing you, and what switching to a best-buy rate is worth this year and over 5 years.
OpenFSCS Protection Calculator
Check whether your savings across UK banks stay within the £85,000 FSCS protection limit, with a suggested split plan for any amount at risk.
OpenFirst-Time Buyer Affordability Calculator
See your maximum borrowing, maximum property price, deposit %, LTV band and an indicative monthly repayment for a first-time buyer mortgage.
OpenAppliance Cost Comparison Calculator
Compare the running cost of an oven, air fryer, microwave and slow cooker — cost per use and per year — and see which is cheapest for how you cook.
OpenShower vs Bath Cost Calculator
Compare the cost of a bath against a shower — energy plus metered water — and see the break-even shower time and eco-head saving.
OpenTumble Dryer vs Line Drying Calculator
What your tumble dryer really costs a year by type, what line-drying instead would save, and the heat-pump dryer upgrade payback.
OpenLED Bulb Savings Calculator
See how much switching to LED bulbs saves a year, the payback period in months, and the saving over 10 years.
OpenWash at 30°C Calculator
What switching your washing machine from 40°C to 30°C saves a year — plus dropping one wash a week on top.
OpenStandby Cost Calculator
What your TV, games console and other "vampire" devices cost left on standby, plus smart plug payback.
OpenThermostat Turn-Down Calculator
What turning your thermostat down by 0.5-2°C saves on heating a year, with an 18°C health guide.
OpenHot Water Cost Calculator
Compare what heating your household's hot water costs on a gas boiler, electric immersion or heat pump.
OpenIs My Energy Direct Debit Right? Calculator
Check whether your gas & electricity Direct Debit is fair, based on your usage, rates and current balance.
OpenShould You Fix Your Energy Tariff? Calculator
Compare a fixed energy deal against your variable tariff, with your own price-cap assumption and the break-even point.
OpenWater Meter Switch Calculator
Compare your unmetered water bill against an estimated metered bill and see if switching would save you money.
OpenInsulation & Efficiency Payback Calculator
Compare loft, cavity wall, draught-proofing and a smart thermostat by payback period, and total a combined package.
OpenSeason Ticket vs Daily Fares Calculator
Compare an annual, monthly and weekly rail season ticket against paying for daily returns, with a break-even point for your commute pattern.
OpenCommute Cost Comparison Calculator
Compare car, train, bus and cycling commute costs side by side, with the annual saving of switching modes, invested.
OpenCycle to Work Savings Calculator
Work out your effective bike price under a Cycle to Work salary sacrifice scheme, including the tax + NI saving and end-of-scheme ownership fee.
OpenWalking & Cycling Savings Calculator
See the annual saving from swapping short car trips for walking or cycling, plus a calorie bonus and invested-instead projection.
OpenHoliday Money Comparison Calculator
Compare a specialist travel card, an online bureau, a high-street bank and the airport bureau for the same holiday money.
OpenOverseas Card Fees Calculator
Compare a fee-free specialist card, a typical debit card and a typical credit card for your trip spend and ATM withdrawals.
OpenAirport Parking vs Taxi Calculator
Compare on-airport parking, off-site park & ride, a return taxi and the train or coach for your trip — see the cheapest way to the airport.
OpenCar Sharing Savings Calculator
See how much sharing your commute could save you a year in fuel and parking, plus a 5-year invested projection.
OpenEV Home Charging Tariff Calculator
Compare a single-rate electricity tariff against an EV off-peak tariff for home charging, plus an honest comparison against petrol.
OpenMobile SIM-Only Calculator
See whether switching to a SIM-only mobile deal would save you money — keep your phone or buy a new one — and spot the out-of-contract trap.
OpenRepair vs Replace Calculator
Work out whether to repair or replace a washing machine, TV, phone or boiler — with a break-even repair price tailored to its remaining life.
OpenFood Waste Cost Calculator
See what food waste really costs your household a week and a year, and what halving it could be worth invested.
OpenRound-Up Savings Calculator
See how much rounding up your card payments to the nearest pound could save you a month and a year, invested over 5-10 years.
OpenBranded vs Generic Calculator
See the annual saving from swapping branded medicines and supermarket staples for generic and own-brand equivalents — same active ingredient, lower price.
OpenPhone Upgrade Wait Calculator
Compare the true cost per year of a 2, 3 or 4-year phone upgrade cycle, including a battery-replacement allowance, and see what stretching the cycle could save.
OpenAppliance Upgrade Payback Calculator
See the annual running-cost saving, simple payback period and an honest replace-now-or-run-it-till-it-dies verdict for a more efficient appliance.
OpenHome & Property
House Buying Cost Calculator
Total upfront cash needed to buy a home — deposit, Stamp Duty and every one-off fee, added up.
OpenHouse Extension Cost Calculator
Estimate the cost of a house extension — build cost per m², architect, structural and statutory fees.
OpenNew Kitchen Cost Calculator
Estimate the cost of a new fitted kitchen — units, worktop, appliances and fitting, budget to premium.
OpenLoft Conversion Cost Calculator
Estimate a rooflight, dormer, hip-to-gable or mansard loft conversion by floor area and finish quality.
OpenBathroom Cost Calculator
Estimate a new bathroom or renovation by finish tier, room size and tiling area, with a full breakdown.
OpenGarage Conversion Cost Calculator
Estimate converting an integral, attached or detached garage by floor area and finish quality.
OpenSolar Panel Cost Calculator
Estimate solar PV installation cost, annual saving and payback period — with or without a battery.
OpenCarpet Cost Calculator
Estimate carpet, underlay, gripper and fitting cost from your room size — budget, mid-range or premium.
OpenFlooring Cost Calculator
Compare supply-and-fit cost for laminate, LVT, engineered wood, solid wood and tile flooring.
OpenPainting Cost Calculator
Estimate paint needed and decorating costs for a room — DIY paint-only vs professional decorator totals.
OpenDriveway Cost Calculator
Estimate driveway costs by area and material — gravel, tarmac, block paving, resin-bound or concrete.
OpenTiling Cost Calculator
Estimate floor or wall tiling costs — tiles, adhesive, grout, wastage and labour — from your area and tile price.
OpenRental Yield Calculator
Work out the gross and net rental yield on a buy-to-let property from the price, monthly rent, running costs and void weeks.
OpenBuy-to-Let Calculator
Estimate monthly cash flow, annual profit after tax and return on investment for an interest-only buy-to-let mortgage, including Section 24.
OpenBoiler Replacement Cost Calculator
Estimate the cost of a new combi, system or regular boiler — unit, power flush and installation labour, by house size and brand tier.
OpenPorch Cost Calculator
Estimate a uPVC, brick or hardwood timber porch by floor area, with base, door and electrics add-ons and a typical price range.
OpenConservatory Cost Calculator
Estimate a lean-to, Victorian, Edwardian or orangery conservatory by floor area, with dwarf wall and electrics/heating add-ons.
OpenPlastering Cost Calculator
Estimate skim, plasterboard + skim, or render costs by area and surface, with a minimum-charge floor and a typical price range.
OpenDecking Cost Calculator
Estimate a softwood, hardwood or composite deck by area, with balustrade and groundwork add-ons and a typical price range.
OpenFencing Cost Calculator
Estimate the cost of a new garden fence — panel, feather-edge or closeboard — including gravel boards and gates.
OpenTurf Cost Calculator
Estimate the cost of a new lawn — turf, topsoil, ground preparation and delivery — by area or dimensions.
OpenConcrete Volume Calculator
Work out how much concrete you need for a slab or footing — volume in m³, 25kg bags, and an indicative ready-mix cost.
OpenBricks Needed Calculator
Estimate the bricks, mortar and total material cost for a wall — single or double skin — from its length and height.
OpenWallpaper Rolls Calculator
Work out how many rolls of wallpaper you need for a room, allowing for openings and pattern repeat, plus total cost.
OpenHeat Pump Cost Calculator
Estimate air source heat pump install cost after the BUS grant, and annual running cost vs a gas boiler.
OpenMoving House Cost Calculator
Removals, packing, cleaning, mail redirection and storage — add up the real cost of moving, and compare DIY van hire against a full-service removal firm.
OpenRenting Upfront Cost Calculator
The total cash you need to move into a rental — deposit (capped by law), first month's rent and moving costs — plus banned letting fees.
OpenCouncil Tax Rebanding Calculator
The classic MoneySavingExpert-style check — estimate your 1991 valuation and see whether your Council Tax band looks right, before you challenge it.
OpenCar & Motoring
Car Loan Calculator
Monthly repayments, total interest and total cost on a fixed-rate car loan.
OpenCar HP (Hire Purchase) Calculator
Monthly payment and total cost on a Hire Purchase deal — own the car at the end.
OpenCar PCP Calculator
Monthly payment on a PCP deal, plus the total cost to keep the car vs hand it back.
OpenCar PCH (Leasing) Calculator
Total cost of a Personal Contract Hire lease — upfront rental, monthly rentals and admin fee.
OpenFuel Cost Calculator
Work out your petrol or diesel cost per journey, per mile and per year from your distance, mpg and fuel price.
OpenEV Charging Cost Calculator
Work out your EV charging cost per full charge, per journey and per mile — home vs public rapid rates.
OpenMPG Calculator
Calculate fuel economy from a fill-up, or convert between mpg and litres per 100km — plus cost per mile.
OpenMileage Claim Calculator
Work out your HMRC AMAP business mileage claim — car, motorcycle or bicycle — plus any Mileage Allowance Relief shortfall.
OpenCar Tax (VED) Calculator
Work out your Vehicle Excise Duty by CO2 emissions and list price — first-year rate, standard rate and the expensive-car supplement.
OpenCompany Car Tax Calculator
Estimate your company car Benefit-in-Kind (BIK) percentage and income tax from the P11D value, CO2 emissions and fuel type.
OpenSpeeding Fine Calculator
Estimate your speeding fine band, penalty points and disqualification risk using UK Sentencing Council guidelines.
OpenCar Cost Calculator
Total cost of owning a car — fuel, insurance, VED, servicing and depreciation — plus cost per year and per mile.
OpenCar Depreciation Calculator
Estimate your car's current value, total depreciation and a year-by-year value table using an editable rate.
OpenCar Insurance Estimate Calculator
A rough indicative annual premium range from age, insurance group, region, mileage and no-claims discount — not a quote.
OpenHealth & Fitness
BMI Calculator
Work out your Body Mass Index and healthy weight range from your height and weight — metric or imperial, NHS categories.
OpenCalorie Maintenance Calculator
Your daily maintenance calories (TDEE) plus weight-loss and weight-gain targets, based on activity level.
OpenBMR Calculator
Your Basal Metabolic Rate — the calories you burn at complete rest — using the Mifflin-St Jeor equation.
OpenIdeal Weight Calculator
A healthy weight range for your height using the Devine, Robinson and Miller formulas plus the NHS BMI range.
OpenPregnancy Due Date Calculator
Estimate your due date, gestational age and trimester from your last period, conception date or IVF transfer date.
OpenSleep Calculator
Find the best time to go to bed or wake up, based on 90-minute sleep cycles.
OpenProtein Intake Calculator
Your daily protein target in grams by goal — maintain, active, build muscle or cut — plus an example day of meals.
OpenWater Intake Calculator
How much water to drink each day based on your bodyweight and exercise, in litres and 250ml glasses.
OpenHeart Rate Zones Calculator
Your estimated maximum heart rate and five training zones in bpm — from warm-up to maximum effort.
OpenVO2 Max Calculator
Estimate your cardiorespiratory fitness from your resting heart rate or a Cooper 12-minute run test.
OpenBody Fat Calculator
Estimate your body fat percentage, fat mass and lean mass using the US Navy circumference method.
OpenOne-Rep Max Calculator
Estimate your one-rep max from a lighter set using the Epley and Brzycki formulas, plus a full %1RM training table.
OpenInsurance
Life Insurance Calculator
Work out how much life insurance cover you need — income replacement, mortgage, debts and children's future costs, minus existing cover and savings.
OpenIncome Protection Calculator
Recommended monthly income protection benefit and a suggested deferred period, based on your income, outgoings, sick pay and savings.
OpenCritical Illness Cover Calculator
Recommended critical illness lump sum to clear debts and fund your recovery, based on your mortgage, outgoings and recovery period.
OpenHome Insurance Sum Insured Calculator
Work out a recommended buildings rebuild sum and contents sum insured from your home's size, type and bedrooms — a cover guide, not a premium.
OpenPet Insurance Estimate Calculator
A rough indicative monthly premium for your dog or cat from species, age, size, cover level and area risk — not a quote.
OpenTravel Insurance Estimate Calculator
A rough indicative premium for your trip from destination, trip length, traveller ages and cover level — not a quote.
OpenEveryday & Tech
Electricity Cost Calculator
Work out what an appliance costs to run per day, week, month and year from its power draw and unit rate.
OpenEnergy Bill Calculator
Estimate your annual and monthly gas and electricity bill from usage, unit rates and standing charges.
OpenBroadband Cost Calculator
Work out the total cost of a broadband contract — monthly price, setup fee and any mid-contract price rise.
OpenAge Calculator
Your exact age in years, months and days, total time lived, day of the week born, and days until your next birthday.
OpenDate Duration Calculator
Days, weeks and months between two dates, with a full years/months/days breakdown and an option to include the end day.
OpenWorking Days Calculator
Business days between two dates, Monday to Friday, with an option to exclude UK bank holidays.
OpenCountdown Calculator
Days, weeks and hours until a future date — or how long ago it was — plus working days until.
OpenPercentage Calculator
Work out X% of Y, what percent one number is of another, percentage change, or increase/decrease a number by a percentage.
OpenTip Calculator
Work out the tip on a bill and split the total fairly between everyone at the table.
OpenFuel Split Calculator
Split a journey's petrol or diesel cost fairly between everyone in the car.
OpenTime Card Calculator
Weekly timesheet hours and pay from your start/end times and hourly rate.
OpenUnit Converter
Convert length, weight, volume, temperature, area and speed between metric and imperial units instantly.
OpenTV Size Calculator
Find the ideal TV size for your viewing distance, or the best viewing distance for your TV — 4K and 1080p.
OpenScreen PPI Calculator
Work out pixels-per-inch, dot pitch and total pixel count from a screen's resolution and diagonal size.
OpenComparisons
Salary Comparison Calculator
Compare two job offers side by side — bonus, overtime, employer pension and commute costs, on both gross and net pay.
OpenCar vs Public Transport Calculator
Compare the annual and 5-year cost of driving vs public transport — fuel, insurance, VED, servicing and depreciation vs your season ticket and taxis.
OpenEV vs Petrol Calculator
Compare an electric car against a petrol or diesel car — running cost per year, total cost of ownership and the break-even mileage.
OpenPCP vs HP vs PCH Calculator
Compare Personal Contract Purchase, Hire Purchase and Personal Contract Hire (leasing) for one car — monthly payment, total cost and ownership outcome.
OpenRent vs Buy Calculator
Compare the net cost of renting to buying a home over your chosen number of years — Stamp Duty, mortgage interest, maintenance and house price growth vs rent and the return on your unspent deposit.
OpenISA vs Savings Calculator
Compare tax-free ISA growth to a taxable savings account for the same deposit, monthly contribution and rate — see the tax paid above the Personal Savings Allowance.
OpenOverpay Mortgage vs Invest Calculator
Compare putting a fixed monthly amount toward mortgage overpayments against investing it instead — interest saved vs projected investment growth, with a risk caveat.
OpenBuy vs Lease Car Calculator
Compare buying a car outright (or on finance) against Personal Contract Hire leasing — total cost over N years, and which one is cheaper.
OpenFixed vs Tracker Mortgage Calculator
Compare a fixed-rate mortgage deal against a tracker-rate deal, with an assumed base-rate change — monthly payment, total interest and which is cheaper.
OpenMortgage Deal Comparison Calculator
Compare 2 or more mortgage offers by rate, fees and cashback over your chosen comparison period — see the true cost of each deal and which one wins.
OpenPersonal & Life
Divorce & Child Maintenance Calculator
Estimate CMS child maintenance, divorce court fees and typical costs, and how assets are usually split.
OpenPro-Rata Holiday Calculator
Work out part-time annual leave entitlement in days or hours from your full-time allowance, checked against the UK statutory minimum.
OpenRetirement Age Calculator
Find your estimated UK State Pension age from your date of birth, then project your pension pot and sustainable retirement income.
OpenCost of Raising a Child Calculator
An indicative total, annual and monthly cost of raising a child to age 18 — adjustable by lifestyle and childcare choices.
OpenLife in Hours Calculator
See how your remaining years break down hour by hour — sleep, work, screen time and more — and how many are still free.
OpenWedding Budget Planner
Split a UK wedding budget across venue, catering, drinks, photography and every other typical category — by total budget or guest count.
OpenWedding Guest Cost Calculator
What attending a wedding really costs you as a guest — travel, accommodation, outfit and gift — plus your full wedding-season total.
OpenChristmas Budget Calculator
Total up gifts, food, decorations, travel and nights out, then see the monthly saving needed to cover Christmas.
OpenPet Lifetime Cost Calculator
The full lifetime cost of a dog, cat or rabbit — food, insurance, vet care and one-off costs — plus the monthly equivalent.
OpenBaby First Year Cost Calculator
What a baby's first year really costs — the pram, cot, car seat, nappies, feeding and childcare — plus the monthly average.
OpenStudent Budget Calculator
Compare student income — maintenance loan, family help and job earnings — against typical weekly outgoings to see your real surplus or shortfall.
OpenHoliday Budget Planner
Build a full holiday budget from flights, accommodation and daily spending, plus a monthly savings target before you go.
OpenStart with the number that matters most to you
No account, no email, no catch — just answers.