Unit converter
Converts across 11 categories of units, including traditional Chinese units such as jin, liang, mu, chi and li.
Convert between 11 categories of units: length, area, volume, weight, speed, time, data storage, power, pressure, angle and temperature.
Steps and notes
What is Unit converter?
Convert across 11 unit categories — length, area, volume, weight, speed, time, data storage, power, pressure, angle and temperature — with one interface. The everyday answer to "how many GB is 4.7 GiB", "mph to km/h" and whether that 100 kB JSON is actually big.
- Pick a category
- Enter the value and pick the source unit from the dropdown
- Copy the converted result — every unit in the category is listed at once
- Time is calculated as 30 days per month and 365 days per year
- Data storage uses powers of 1024 (KB = 1024 bytes)
- Temperature uses conversion formulas rather than a shared coefficient
Frequently asked questions
- What is the difference between kB and KiB?
- kB is decimal (1 kB = 1000 B); KiB is binary (1 KiB = 1024 B). Storage vendors use decimal, operating systems often report binary, and the gap grows with size — hence "missing" disk space.
- How precise are the conversions?
- Factors use standard definitions (inch = 25.4 mm exactly, mile = 1.609344 km). For derived categories like speed, the calculation composes exact factors, so precision is limited by your input, not the table.
- Why is temperature in its own category?
- Because temperature conversion is not multiplication by a factor — it needs offsets (0 °C = 273.15 K). Treating it like a scaled unit is a classic bug, so it gets dedicated handling.
Category: Measurement
Unit & data conversion workflow
Unit converter → Temperature converter → px / rem converter