Length Converter
Convert between all common length and distance units — millimetres, centimetres, metres, kilometres, inches, feet, yards, miles, nautical miles, and light years. Instant, accurate results.
1 Millimetre (mm) = 0.1 Centimetre (cm)
1 Millimetre (mm) in all units
| Unit | Value |
|---|---|
| Millimetre (mm)input | 1 |
| Centimetre (cm) | 0.1 |
| Metre (m) | 0.001 |
| Kilometre (km) | 0.000001 |
| Inch (in) | 0.03937007874 |
| Foot (ft) | 0.003280839895 |
| Yard (yd) | 0.001093613298 |
| Mile (mi) | 6.213712e-7 |
| Nautical Mile | 5.399568e-7 |
| Light Year | 1.056971e-19 |
How to Use the Length Converter
- 1
Select the unit you want to convert FROM (e.g. feet).
- 2
Enter the numeric value in the input field.
- 3
Select the unit you want to convert TO (e.g. metres).
- 4
The result appears instantly below.
- 5
Use the ⇄ swap button to reverse the conversion.
- 6
Scroll down to see the value in all available units at once.
Length Conversion Formulas
1 inch = 2.54 cm
1 foot = 30.48 cm = 0.3048 m
1 yard = 0.9144 m
1 mile = 1,609.344 m = 1.609344 km
1 nautical mile = 1,852 m
1 light year = 9.461 × 10¹⁵ mFrequently Asked Questions
How many centimetres are in an inch?
1 inch = 2.54 centimetres exactly. So 12 inches (1 foot) = 30.48 cm.
How do I convert feet to metres?
Multiply feet by 0.3048. For example, 6 feet = 6 × 0.3048 = 1.8288 metres.
How many kilometres in a mile?
1 mile = 1.60934 kilometres. Conversely, 1 km = 0.62137 miles.
What is a nautical mile?
A nautical mile equals 1,852 metres (1.852 km). It is used in aviation and maritime navigation and corresponds to one minute of arc of latitude.