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81 free calculators · UK 2026/27 rates

Free UK calculators, sorted in seconds

Take-home pay, stamp duty, mortgages, VAT, holiday entitlement, fuel, DIY and more. Every calculator uses the latest UK rules, shows its working and runs privately in your browser. 100% free, no sign-up.

BMI calculatorEnergy cost calculatorFuel cost calculatorPension calculatorPercentage calculatorPro rata salary calculatorStamp duty calculatorTake-home pay calculatorMortgage calculatorHoliday entitlement calculatorCar tax calculator

Tax & salary 12

Work out your take-home pay, income tax, National Insurance and VAT using the latest UK rates.

All 12 tax & salary calculators →

Mortgages & property 9

Mortgage repayments, how much you can borrow and stamp duty on your next home.

All 9 mortgages & property calculators →

Savings, loans & pensions 8

See how savings grow, what a loan or credit card really costs and how big your pension could be.

All 8 savings, loans & pensions calculators →

Work & employment 12

Holiday entitlement, pro rata salaries, overtime, redundancy, sick and maternity pay.

All 12 work & employment calculators →

Cars & driving 7

Fuel costs, MPG, car finance and electric car charging costs.

All 7 cars & driving calculators →

Home, DIY & energy 13

Energy running costs, paint, flooring, tiles and concrete for your next project.

All 13 home, diy & energy calculators →

Health & body 8

BMI, calories, pregnancy due dates and alcohol units, based on NHS guidance.

All 8 health & body calculators →

Everyday maths 12

Percentages, ages, dates and time: quick answers to everyday sums.

All 12 everyday maths calculators →

Salary after tax

£18,000£20,000£22,000£25,000£28,000£30,000£32,000£35,000£38,000£40,000£45,000£50,000£55,000£60,000£70,000£80,000£100,000

Guides

Income tax bands and rates for 2026/27Every band and rate for England, Wales, NI and Scotland.National Insurance rates for 2026/27Class 1 and Class 4 rates and thresholds explained.The 60% tax trap explainedWhy £100k–£125k earners pay 60% and how to avoid it.UK minimum wage rates from April 2026National Living Wage £12.71 and every age band.Student loan repayment thresholds for 2026/27Thresholds and rates for every student loan plan.Stamp duty for first-time buyersHow first-time buyer relief works and who qualifies.

Why use FreeCalcBox?

  • Built for the UK. Tax, National Insurance, student loans, stamp duty, statutory pay and the minimum wage use the 2026/27 figures from HMRC and GOV.UK.
  • Shows its working. See the bands, rates and formulas behind every answer, so you can check it yourself.
  • Private. Nothing you type is sent anywhere. The sums run in your browser.
  • Always free. No sign-up, no paywall, no app to download.