Unit Converter — Length, Weight, Temperature & More
Convert any unit to any unit across eight everyday categories. Recipes ask for ounces, gym equipment lists pounds, weather reports switch between Celsius and Fahrenheit, and phone storage jumps between MB and GB — the world can't agree on one system. This unit converter covers length, weight, temperature, area, volume, speed, digital storage and time, with more than 60 units from millimetres to nautical miles and bytes to terabytes. Type a value, pick your units, and get a precise answer instantly — including exact conversion factors shown alongside, so you can double-check everything.
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How to convert units online for free
- 1
Pick a category tab — Length, Weight, Temperature, Area, Volume, Speed, Data or Time.
- 2
Enter the value you want to convert and choose the unit you're converting from.
- 3
Choose the unit you want to convert to — the result appears instantly.
- 4
Use the swap button to reverse the conversion in one tap.
Why use this unit converter tool?
8 categories, 60+ units
Length, weight, temperature, area, volume, speed, digital storage and time — everyday and technical units together in one place.
Exact conversion factors
Every result shows the precise factor used (e.g. 1 inch = 2.54 cm exactly), so you can verify answers for school or work.
Instant swap
One tap reverses the direction of the conversion without retyping anything.
Smart precision
Results display a sensible number of decimals — tiny values keep their significant digits instead of collapsing to zero.