Common Converters
Length Converter
Convert between metric and imperial/US customary length units, plus nautical, astronomical and survey units. The meter is the SI base unit of length; all factors below are exact definitions where a legal definition exists.
LENGTH CONVERTER — INSTANT RESULT
All supported units — length
| Unit | Symbol | To meter (m) | From meter (m) |
|---|---|---|---|
| Kilometer | km | 1 km = 1,000 m | 1 m = 0.001 km |
| Meter | m | 1 m = 1 m | 1 m = 1 m |
| Centimeter | cm | 1 cm = 0.01 m | 1 m = 100 cm |
| Millimeter | mm | 1 mm = 0.001 m | 1 m = 1,000 mm |
| Micrometer | µm | 1 µm = 1e-06 m | 1 m = 1,000,000 µm |
| Nanometer | nm | 1 nm = 1e-09 m | 1 m = 999,999,999.99999988 nm |
| Angstrom | Å | 1 Å = 1e-10 m | 1 m = 10,000,000,000 Å |
| Mile | mi | 1 mi = 1,609.344 m | 1 m = 0.00062137119 mi |
| Nautical Mile | nmi | 1 nmi = 1,852 m | 1 m = 0.0005399568 nmi |
| Yard | yd | 1 yd = 0.9144 m | 1 m = 1.0936133 yd |
| Foot | ft | 1 ft = 0.3048 m | 1 m = 3.2808399 ft |
| Inch | in | 1 in = 0.0254 m | 1 m = 39.37007874 in |
| Thou (mil) | thou | 1 thou = 2.54e-05 m | 1 m = 39,370.07874016 thou |
| Furlong | fur | 1 fur = 201.168 m | 1 m = 0.0049709695 fur |
| Chain | ch | 1 ch = 20.1168 m | 1 m = 0.049709695 ch |
| Rod | rd | 1 rd = 5.0292 m | 1 m = 0.19883878 rd |
| Fathom | ftm | 1 ftm = 1.8288 m | 1 m = 0.54680665 ftm |
| Hand | hand | 1 hand = 0.1016 m | 1 m = 9.84251969 hand |
| League | lea | 1 lea = 4,828.032 m | 1 m = 0.00020712373 lea |
| Cable | cable | 1 cable = 185.2 m | 1 m = 0.005399568 cable |
| Light Year | ly | 1 ly = 9.46073e+15 m | 1 m = 1.057e-16 ly |
| Astronomical Unit | AU | 1 AU = 149,597,870,700 m | 1 m = 6.68459e-12 AU |
| Parsec | pc | 1 pc = 3.08568e+16 m | 1 m = 3.24078e-17 pc |
| Point (DTP) | pt | 1 pt = 0.00035277778 m | 1 m = 2,834.64566911 pt |
Popular length conversions
mm to incm to inm to ftkm to miin to ftm to ydcm to ftmi to nmiµm to mmmm to cmyd to ftin to cmft to mmi to kmin to mmft to cmftm to ftÅ to nmly to kmAU to kmpc to lythou to in
Frequently asked questions
What units does this length converter support?
It supports 24 units: Kilometer (km), Meter (m), Centimeter (cm), Millimeter (mm), Micrometer (µm), Nanometer (nm), Angstrom (Å), Mile (mi), Nautical Mile (nmi), Yard (yd), Foot (ft), Inch (in), Thou (mil) (thou), Furlong (fur), Chain (ch), Rod (rd), Fathom (ftm), Hand (hand), League (lea), Cable (cable), Light Year (ly), Astronomical Unit (AU), Parsec (pc), Point (DTP) (pt).
What is the base unit of length?
The SI reference unit is the meter (m). Every conversion is computed by converting the input to the base unit, then from the base unit to the target unit, so chained precision is preserved.
Is this converter accurate?
Yes. Conversion factors use exact legal definitions where they exist (for example 1 in = 25.4 mm exactly) and CODATA/ISO constants otherwise. Results are shown to up to 10 significant figures.