International inch, foot, yard and mile definitions are exact. One inch equals exactly 2.54 centimeters.
How to use this length converter
- Enter a number in either value field.
- Choose the starting and target units.
- Copy the calculated result or swap the direction.
Convert metric and imperial length units
Use the two selectors to convert millimeters, centimeters, meters and kilometers to inches, feet, yards or miles in either direction. Enter a value on either side and the reciprocal result updates immediately, which is useful for product dimensions, travel distances, building measurements and study work.
Common length conversion formulas
The international definitions are exact: 1 inch equals 2.54 centimeters, 1 foot equals 0.3048 meters, 1 yard equals 0.9144 meters and 1 mile equals 1.609344 kilometers. The displayed result may be rounded for readability, but the converter calculates through a shared base unit using the full stored factor.
How do you convert meters to feet?
Multiply meters by approximately 3.28084. For example, 2 meters is about 6.56168 feet. To reverse the conversion, multiply feet by exactly 0.3048 to get meters.
How do you convert kilometers to miles?
Multiply kilometers by approximately 0.621371. A 5-kilometer distance is about 3.10686 miles. For miles to kilometers, multiply by exactly 1.609344.
How do you convert inches to centimeters?
Multiply inches by exactly 2.54. A 12-inch measurement is 30.48 centimeters. Divide centimeters by 2.54 to convert back to inches.
Length, distance, height and width use the same units
The same factors apply whether the number describes a person's height, a room length, a product width or a road distance. Choose units that fit the scale: millimeters and centimeters for small objects, meters and feet for rooms or height, and kilometers or miles for journeys.
Popular length conversions
Jump straight to a specific pair, each with its own formula and conversion table.