UK Calculators Hub
Browse every free calculator on FastCalculator.co.uk. All tools are UK-focused, run entirely in your browser, and cite the official HMRC source where tax rates are used. Choose a category below to get started.
💷 UK Tax Calculators
Calculate UK income tax, tax bands, deductions and taxable income.
Tax Calculator UK
General-purpose UK tax calculator for estimating your income tax liability.
Open →Income Tax Calculator UK
Calculate your income tax for the current UK tax year based on your earnings.
Open →UK Income Tax Calculator
Calculate income tax for England, Wales, Scotland and Northern Ireland.
Open →Tax Bracket Calculator
Find which UK tax bracket your income falls into and how much tax you pay at each rate.
Open →Tax Rate Calculator UK
Quickly identify the basic, higher or additional rate that applies to your income.
Open →Tax Deduction Calculator
See all deductions from your gross pay — income tax, NI, pension and more.
Open →Taxable Income Calculator
Work out your taxable income after the Personal Allowance and deductions.
Open →Effective Tax Rate Calculator
Calculate your effective tax rate — the average rate you pay across all your income.
Open →💵 Salary & Pay Calculators
Convert hourly, weekly, monthly and annual pay with these free UK salary tools.
Salary Calculator UK
Convert between annual, monthly, weekly and daily salary figures quickly.
Open →Annual Salary Calculator
Work out your annual salary from hourly, daily, weekly or monthly pay.
Open →Monthly Salary Calculator
Calculate your monthly take-home pay after tax and National Insurance.
Open →Hourly to Salary Calculator
Convert your hourly wage into annual, monthly, weekly and daily salary figures.
Open →Payroll Deductions Calculator
See how much is deducted from gross pay for tax, NI and other contributions.
Open →Take-Home Pay Calculator
See your net pay after income tax, National Insurance and pension contributions.
Open →📈 Investment & Finance Calculators
Plan investments, savings and business finance with these free UK tools.
Investment Calculator UK
Estimate the future value of your investment with regular contributions and compound interest.
Open →Investment Growth Calculator
Project how your investment grows over time with compound returns.
Open →IR35 Calculator UK
Check your IR35 status and estimate tax liabilities for off-payroll working.
Open →NPV Calculator UK
Calculate the net present value of an investment to evaluate its profitability.
Open →Profit Margin Calculator
Calculate your profit margin, markup and gross profit for products or services.
Open →Retirement Calculator UK
Estimate how much you need to save for retirement based on your goals.
Open →Salary Sacrifice Calculator
Compare your take-home pay with and without salary sacrifice arrangements.
Open →🧰 Other Useful Calculators
Everyday tools for mileage, car payments and health checks.
Car Payment Calculator
Estimate monthly car loan payments and total interest based on loan amount, APR and term.
Open →📄 Legal & Information
Site policies, contact details and general information.
About These Calculators
Every calculator on this page runs entirely in your browser — your figures are never sent to or stored on our servers. Where tax rates are used, they are sourced from HMRC and clearly labelled with the relevant tax year.
These tools provide estimates only and do not constitute financial or tax advice. For personalised guidance, consult a qualified accountant or refer to the official GOV.UK income tax guidance. FastCalculator.co.uk is independent and is not affiliated with HMRC or the UK Government.
If you spot an error or would like to suggest a new calculator, please contact us.