Unit Converter

Calculators

Convert length, mass, temperature, area, volume, speed, data and time — with every unit in the category shown at once.

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What are you converting

Value

FromTo

Significant figures6

Optimized For Platforms

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How it works

1Choose a category, then the units to convert between.

2The result appears alongside the same value in every other unit of that category.

3Conversions use the exact legal definitions — an inch is exactly 25.4 mm, a pound exactly 0.453 592 37 kg — not rounded factors.

4The data category lists decimal and binary units separately, because KB and KiB are genuinely different sizes.