Unit Converter
Convert between metric and imperial units for length, weight, temperature and volume.
How to use
- 1
Pick a category: length, weight, temperature or volume.
- 2
Choose the unit you're converting FROM and the unit you want TO.
- 3
Type the value. The result updates instantly.
- 4
Swap the from/to selectors to convert the other way without retyping.
Frequently asked questions
Length, weight and volume have a fixed zero point — zero metres really is zero, so multiplying by a factor works. Temperature scales have different zero points: 0°C is the freezing point of water, 0°F is a specific brine mixture, 0 K is absolute zero. So Celsius to Fahrenheit needs (C × 9/5) + 32, not just a multiplier. This calculator handles the maths for you.
A UK gallon is about 4.546 litres, a US gallon is about 3.785 litres. So a US gallon is roughly 83% of a UK gallon. Recipe books and fuel economy figures from the US and UK use different gallons — if you don't notice, you'll over-pour by about 20%. The calculator separates them.
Up to 6 significant decimal places. Useful for science and engineering. For everyday cases (cooking, car distances) the first 2–3 places are all you need. If the result is very small or very large, the calculator uses regular notation rather than scientific to keep it readable.
International inch was standardised in 1959 at exactly 25.4 mm. That makes every imperial length conversion in this calculator (foot, yard, mile) ultimately a derivative of that single number. Before 1959 the inch varied slightly between the US and UK; this is a useful piece of trivia, not a real engineering concern today.
If a unit isn't listed, find one that is and chain conversions. For example, if you need acres (area) the calculator doesn't cover area — but you can search 'acres to square metres' separately. We covered the four most-converted categories rather than everything.
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Source: Standard SI / imperial conversion factors · Last verified 2026-06. This tool provides estimates only and is not legal, tax or financial advice. Always verify your specific situation with the relevant UAE authority or a licensed advisor before taking action.