Free UK Calculators — Built for 2026/27
TheCalculatorSite.co.uk brings together every calculator UK households, workers, landlords and businesses actually need — all using current HMRC rates, all in pounds sterling, all free with no registration. Our tax tools update automatically each April when the new tax year begins, so the figures you see are always for the current year.
Whether you're checking your take-home pay after the latest National Insurance changes, working out stamp duty on a house purchase, scaling a recipe for Sunday dinner, or splitting a restaurant bill — there's a purpose-built calculator here that shows its working, explains the rules, and links you to the official guidance.
Disclaimer: all calculators are for guidance only and do not constitute financial, tax or legal advice. Always verify significant decisions with HMRC or a qualified professional.