Length Converter
Convert between different units of length including meters, feet, inches, kilometers, miles, and more.
Length Conversion Calculator
Common Length Conversions
Length Units Reference
Metric System
- 1 km = 1,000 m
- 1 m = 100 cm
- 1 cm = 10 mm
Imperial System
- 1 mi = 5,280 ft
- 1 yd = 3 ft
- 1 ft = 12 in
Conversions
- 1 in = 2.54 cm
- 1 ft = 0.3048 m
- 1 mi = 1.609 km
Understanding Length & Distance Conversions
Length conversions move a measurement between the metric system (millimeters, centimeters, meters, kilometers) and the imperial/US customary system (inches, feet, yards, miles). Every conversion on this page routes through the SI base unit, the meter, so results stay consistent no matter which two units you pick.
The exact relationships are fixed by international agreement: 1 inch is defined as exactly 2.54 cm, 1 foot is 0.3048 m, and 1 mile is 1,609.344 m. Because these are definitions rather than approximations, the converter returns precise values rather than rounded estimates. The nautical mile (1,852 m) is the odd one out, it is based on one minute of latitude and is used in aviation and maritime navigation, not everyday distance.
Frequently Asked Questions
How many feet are in a meter?
One meter equals 3.28084 feet. To convert meters to feet, multiply the number of meters by 3.28084.
How do I convert inches to centimeters?
Multiply the number of inches by 2.54, since one inch is defined as exactly 2.54 centimeters.
Is a nautical mile the same as a mile?
No. A statute mile is 1,609.344 meters, while a nautical mile is 1,852 meters, about 15% longer. Nautical miles are used for sea and air navigation.
How many kilometers are in a mile?
One mile equals approximately 1.60934 kilometers.