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Every calculator here runs in your browser. Nothing you type is sent anywhere, nothing is stored, and there is no sign-up.
The tax calculators use published HMRC rates for the 2026/27 year, and each page names the figures it is built on so you can check them.
Most used: Take-home pay · Stamp duty · Mortgage · VAT
onlinecalculatorsite.com is a growing set of free calculators for money, tax and property, with maths, health, conversion and construction tools being added. Each one is written and checked individually rather than generated, and every figure a calculator depends on is stated on its page.
Spotted something wrong? That is worth telling us about — a calculator that is quietly inaccurate is worse than no calculator at all.