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Convert any unit.
In seconds.
From centimetres to inches, kilograms to pounds, and much more. Simple, accurate conversions directly in your browser.
Unit converter
Type in either box — both directions update instantly
Enter a value to convert.
Popular conversions
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Instant answers
Conversions update immediately. No submit button.
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Values are calculated on your device. No accounts or data uploads.
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10 categories
Length, mass, temperature, area, volume, speed, time, storage, pressure and energy.
How to use QuickUnits
Choose a category, enter a number, into either box, and select the units. The other box updates automatically. Copy the right-side result with one click. Temperature uses the appropriate offset formulas; other categories use verified conversion factors.