Free Online Calculators
Built for the UK
35+ accurate, easy-to-use calculators for finance, tax, health, and everyday life — completely free, no sign-up needed.
Popular Calculators
Most used this monthUK Take Home Pay Calculator
Find out exactly how much you keep after tax, NI and student loan deductions.
Stamp Duty (SDLT) Calculator
Calculate stamp duty on your property purchase in England and Northern Ireland.
Inheritance Tax Calculator
Estimate IHT liability on an estate using current UK thresholds and exemptions.
Maternity Pay Calculator
Work out your statutory maternity pay and what you’re entitled to from your employer.
Business Loan Calculator
Plan business borrowing with monthly repayment and total interest estimates.
Calorie Deficit Calculator
Calculate your daily calorie deficit target to reach your weight loss goal.
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All Calculators
Browse by categoryFinance & Tax
10 toolsProperty & Housing
3 toolsPay & Employment
5 toolsInsurance & Loans
3 toolsHealth & Lifestyle
4 toolsHome & Energy
5 toolsImmigration & Legal
2 toolsGaming & Fun
1 toolWhy Use Our Calculators?
Comprehensive Tools
From income tax to ovulation, we cover every calculation a UK resident might need.
UK-Specific Accuracy
Built around HMRC rules, UK legislation, and British standards — not generic global data.
Always Free
Every calculator is fully free. No account, no subscription, no hidden charges — ever.
Works on Any Device
Fully responsive — use on your phone, tablet, or desktop with the same great experience.
Frequently Asked Questions
Common questionsYes — every calculator on this site is completely free. There’s no sign-up, no account required, and no premium tier. We believe useful tools should be accessible to everyone.
Our calculators are built using current UK legislation and HMRC guidelines. While they give reliable estimates, we always recommend verifying financial or legal decisions with a qualified professional.
Absolutely. Every tool is fully responsive and tested on iOS and Android. The layouts adapt to your screen size so you get the same quality experience on any device.
Most of our tools are built specifically for UK users — using British tax rates, HMRC rules, NHS guidelines, and UK law. A small number of tools (like our federal tax calculator) are US-focused and are clearly labelled.
We review and update calculators whenever UK legislation changes — including annual Budget announcements, HMRC rate changes, and updates to employment or housing law.
Yes! We’re always expanding our collection based on what our users need. Use the contact page to suggest a calculator and we’ll do our best to build it.