Unit converters
Convert between any units of length, weight, temperature, area, volume, speed, and currency. Instant results, works on any device.
Measurement
Length Popular
Convert between centimetres, metres, feet, inches, kilometres, miles, and more.
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Weight
Convert between kilograms, pounds, ounces, grams, stones, and tonnes.
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Temperature
Convert between Celsius, Fahrenheit, and Kelvin with formula reference.
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Area
Convert between square feet, square metres, acres, hectares, and more.
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Volume
Convert between litres, gallons, millilitres, cups, fluid ounces, and cubic metres.
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Speed
Convert between km/h, mph, knots, m/s, and feet per second.
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About unit converters
Every converter on this page performs instant, bidirectional conversions. Enter a value in any unit and see all other units update in real time. No buttons to press, no page reloads.
Which converter should I use?
Common questions
Are these conversions accurate?
Yes. All conversions use exact mathematical ratios defined by international standards (SI, imperial). Currency rates are approximate and may differ from live market rates.
Do I need to press a button to convert?
No. All converters update instantly as you type. Enter a value in any field and the rest update automatically.
Can I convert between metric and imperial?
Yes. Every converter supports both metric and imperial units, plus many additional regional units.