UK Calculators
Free calculators for UK pay, tax, property and everyday finances — with clear workings and sources.
Type to search calculators
Start here
Popular calculators
Income Tax Calculator
Estimate income tax by band, including the personal allowance taper on higher incomes.
National Insurance Calculator 2026/27
Estimate employee Class 1, employer National Insurance and self-employed Class 4 contributions.
Payroll Calculator
Estimate payslip deductions, net pay, employer National Insurance, pension and total employment cost.
Percentage Calculator
Percentage of a number, percentage change and one number as a percentage of another.
Self-Employed Tax Calculator
Estimate Income Tax, Class 4 NI, take-home profit and a monthly tax set-aside on trading profit.
Take Home Pay Calculator
See what lands in your account each month after income tax, National Insurance and pension.
Find the right tool
Browse by category
Money & Tax
Work out take-home pay, income tax, National Insurance, VAT and dividend tax.
Mortgages & Property
Repayments, overpayments, stamp duty and buy-to-let numbers for UK property.
Business
Corporation tax, VAT positions and the numbers behind running a UK company.
Savings & Investments
Interest, compounding and what regular contributions grow into over time.
Loans & Credit
Loan repayments, total interest and how long credit card balances take to clear.
Everyday Calculators
Percentages, dates, ages and the small sums that come up constantly.
Built for clarity
Clear workings. Informed decisions.
Each completed calculator has its own permanent page with the calculation, a plain-English explanation, worked examples, assumptions, FAQs, sources and carefully chosen related tools.
- Visible workings and assumptions
- Official sources where relevant
- Tax year and review dates
- No login needed
Recently reviewed
- Income Tax Calculator
- National Insurance Calculator 2026/27
- Payroll Calculator
- Percentage Calculator
- Self-Employed Tax Calculator