Unit Converter
Convert between metric and imperial length and weight, data sizes from bytes to terabytes, and time units.
Convert length, weight, data size and time between common units.
Result
39.37007874
100 cm in in
Units: mm, cm, m, km, in, ft, yd, mi
100 cm = 39.37007874015748 inAbout the unit converter
Data size is the one people get wrong. A kilobyte here means 1024 bytes, the binary convention that operating systems use, which is why a drive sold as 1TB shows as roughly 931GB in your file manager. Storage manufacturers use powers of ten.
Length, weight and time use their standard conversion factors.
How to use it
- 1Choose a category.
- 2Enter the value and the units, using the abbreviations listed under the result.
- 3Read the conversion, or the full list in the second tab.
Questions
Why does my 1TB drive show as 931GB?
The manufacturer counts a terabyte as a trillion bytes; the operating system counts it as 1024 to the fourth power. Same drive, two conventions.
Which units are supported?
Length from millimetres to miles, weight from milligrams to pounds, data from bytes to terabytes, and time from milliseconds to weeks. The available abbreviations are listed under the result.
Does it use binary or decimal for data?
Binary, where 1KB is 1024 bytes, matching how operating systems report file sizes.