Tool
Unit Converter
Convert a value between length, mass, temperature, data-size, and time units.
Try it
This tool runs entirely in your browser. Nothing you type or paste is sent anywhere.
1 km equals 0.621371192237 mi.
How it works
- Confirmed both units measure length.
- Converted the source value to the dimension's base unit, then to the target unit.
- Applied the exact factor and rounded to 12 significant digits.
1 km = 0.621371192237 miUsage
- Enter the numeric value.
- Choose the source and target units.
- Read the converted value and the conversion formula.
Examples
Kilometres to miles
{
"value": 1,
"from": "km",
"to": "mi"
}Celsius to Fahrenheit
{
"value": 100,
"from": "c",
"to": "f"
}Mebibytes to megabytes
{
"value": 1,
"from": "mib",
"to": "mb"
}Limitations
Decimal vs. binary data units
The IEC binary prefixes (KiB, MiB, GiB, TiB) are powers of 1024; the SI decimal prefixes (KB, MB, GB, TB) are powers of 1000. Both appear in documentation, so this tool supports both and keeps them separate.
Frequently asked questions
- Why does 1 MiB not equal 1 MB?
- MiB is 1024² bytes while MB is 1000² bytes. Disk and network vendors often use decimal prefixes, which is why the two numbers differ.