mathDifficulty: 3/5
Unit Converter
Convert between length, area, volume, mass, temperature, time, speed and digital storage units. Searchable units, exact factors, and no server round trip.
11 of 11 units shown
1 nm = 0.001 µm
How it works
- Choose a category such as length, mass or temperature.
- Pick the units to convert from and to — use the search box to find one quickly.
- The result updates as you type. Press Swap to reverse the direction.
Frequently Asked Questions
Which categories are supported?
Length, area, volume, mass and weight, temperature, time, speed, and digital storage — with more addable without changing the tool.
Are the conversion factors exact?
Yes, where an exact definition exists. An inch is exactly 2.54 cm and a pound is exactly 0.45359237 kg, and temperature uses proper affine conversion rather than a simple multiplier.
Do you distinguish MB from MiB?
Yes. Decimal (kB, MB, GB) and binary (KiB, MiB, GiB) prefixes are listed separately because they are genuinely different sizes.