Length converter
Metres, kilometres, inches, feet, yards, miles, nautical miles, light-years. Type a value, pick the units; the result and the table update as you type, and the address bar keeps the conversion so you can share it.
1 kilometre in every length unit
| Unit | Value | Symbol |
|---|---|---|
| nanometre | 1000000000000 | nm |
| micrometre | 1000000000 | um |
| millimetre | 1000000 | mm |
| centimetre | 100000 | cm |
| metre | 1000 | m |
| kilometre | 1 | km |
| inch | 39370.1 | in |
| foot | 3280.84 | ft |
| yard | 1093.61 | yd |
| mile | 0.621371 | mi |
| nautical mile | 0.539957 | nmi |
| astronomical unit | 6.68459e-9 | au |
| light-year | 1.057e-13 | ly |
Other converters: Area · Volume · Mass · Temperature · Speed · Time · Energy · Power · Pressure · Data · Angle · Frequency · Fuel economy
About the length converter
Conversions use exact definitions where they exist (an inch is 25.4 mm, a pound is 0.45359237 kg, a US gallon is 3.785411784 L) and standard values elsewhere; results are shown to six significant figures. Temperature converts through Celsius; fuel economy is an inverse relation, so it converts through litres per 100 km. Everything runs in your browser and nothing you type is stored — the address bar simply keeps the value and units so you can bookmark or share a conversion. More tools: Tools for students, including the scientific calculator, which also understands units inline (5 km / 20 minutes to km/h).