Conversion Calculator
One converter for every kind of measurement — enter a value and see it in every unit at once.
1 m in every length unit
| Unit | Symbol | Value |
|---|---|---|
| nanometer | nm | 1,000,000,000 nm |
| micrometer | µm | 1,000,000 µm |
| millimeter | mm | 1,000 mm |
| centimeter | cm | 100 cm |
| decimeter | dm | 10 dm |
| meter | m | 1 m |
| dekameter | dam | 0.1 dam |
| hectometer | hm | 0.01 hm |
| kilometer | km | 0.001 km |
| angstrom | Å | 10,000,000,000 Å |
| thou (mil) | mil | 39,370.08 mil |
| inch | in | 39.3701 in |
| foot | ft | 3.2808 ft |
| yard | yd | 1.0936 yd |
| fathom | ftm | 0.546807 ftm |
| rod | rod | 0.198839 rod |
| chain | ch | 0.04971 ch |
| furlong | fur | 0.00497097 fur |
| mile | mi | 0.00062137 mi |
| nautical mile | nmi | 0.00053996 nmi |
| hand | hh | 9.8425 hh |
| astronomical unit | AU | 6.68459e-12 AU |
| light year | ly | 1.057e-16 ly |
| parsec | pc | 3.24078e-17 pc |
One tool, every measurement
Choose what you are measuring, enter a value with its unit, and the table shows that same quantity in every other unit of the same kind. Nothing is rounded away before the conversion — each row is computed from your original value.
How the conversions work
Every unit is defined by its factor to one reference unit for that measurement: the metre for length, the kilogram for mass, the pascal for pressure. Converting means going through that reference:
result = value × (factor of your unit) ÷ (factor of the target)
Storing one factor per unit rather than a table of every pair means the same 30 length units give 900 possible conversions from 30 numbers, and none of them can disagree with each other.
Where a single factor is not enough
Temperature scales do not share a zero point, so they need an offset as well as a scale factor — 0 °C is 32 °F, not zero. Fuel economy is worse still: litres per 100 km is the reciprocal of miles per gallon, so the conversion inverts rather than multiplies. Both are handled correctly here, but it is why you cannot simply memorise a multiplier for them.
If you want a focused tool
Every measurement here also has its own dedicated page with a reference table and an explanation of the units — see the full conversion collection. This page exists for when you would rather not go looking.