Convert anything,
the UK way.
Free calculators & converters built for the UK — Gas Mark, baking units, shoe sizes, VAT and more. Everything runs in your browser, nothing uploaded.
Built for the UK
Gas Mark, imperial units, UK VAT — the conversions American tool sites cover poorly or not at all.
Private by design
Every calculation runs in your browser. Your inputs never leave your device — GDPR friendly.
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Featured Tools
View all 25 →UK Rent vs Buy Calculator
Work out whether renting or buying leaves you better off over 10 years — comparing mortgage, rent, and investing the difference.
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UK Mortgage Calculator
Calculate your monthly mortgage repayments — UK property price, deposit, interest rate and term.
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UK Stamp Duty Calculator
Calculate UK Stamp Duty Land Tax (SDLT) on any property price — standard, first-time buyer, or second home.
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Gas Mark Converter
Convert UK Gas Mark (1-10) to Celsius, Fahrenheit, and fan oven temperatures.
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UK Income Tax Calculator
Calculate your UK take-home pay after Income Tax and National Insurance — 2026/27 and 2025/26 tax years.
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Currency Converter (GBP, EUR, USD)
Live currency converter for GBP, EUR, USD and 9 more — for cross-border spending after Brexit.
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No data upload. GDPR friendly.
Every tool here runs entirely in your browser. We don't send your inputs anywhere — no tracking your calculations, no servers processing your numbers. That's our privacy promise to European users.