Tape measures can be used to measure units of length, and a calculator can be used to convert to another unit

Length Unit Conversion Calculators

To convert a unit of length to another, metric or imperial, choose a unit to convert from.

Converting Length Measurements

converting length measurements between US standard distance measurements and metric system distance measurements

Length is the distance of the longest horizontal dimension of an object. If the object is a rectangle, length would be the distance of the longest edge of the rectangle. Height is considered the distance of the vertical dimension of an object and width is the distance of the shortest horizontal dimension of an object. Cambridge Dictionary defines length as the measurement of something from end to end. Length is measured using distance units, such as inches, feet, miles, centimeters, meters, or kilometers. To convert measurements of length from one unit to another, convert the unit to a base unit with a known conversion formula, then convert from the base unit to the target unit of measurement. Our formulas convert the length unit to meters, then converts from meters to the destination unit. Math is Fun has a number of unit conversion formulas if you want to convert your units of measurment yourself. The unit conversion tools above will convert length from one unit of measure to another, automatically. See some of our measurement resources, such as our inch fraction calculator, printable tape measure or our printable rulers.

Units of Length Measurement

Units of length include miles, yards, feet, inches, kilometers, meters, centimeters, millimeters, micrometers, and nanometers.

Common Length Measurement Conversions

Miles to Kilometers Length Conversion
1 mile is equal to 1.609344 kilometers
Kilometers to Miles Length Conversion
1 kilometer is equal to 0.621371 miles
Feet to Inches Length Conversion
1 foot is equal to 12 inches
Feet to Meters Length Conversion
1 foot is equal to 0.3048 meters
Inches to Centimeters Length Conversion
1 inch is equal to 2.54 centimeters
Centimeters to Inches Length Conversion
1 centimeter is equal to 0.393701 inches

Length Unit Conversion Table

Equivalent length metric and imperial measurements
Mile Yard Foot Inch Kilometer Meter Centimeter Millimeter Micrometer Nanometer
1 mile = 1 1,760 5,280 63,360 1.609344 1,609 160,934 1,609,344 1,609,344,000 1,609,344,000,000
1 yard = 0.000568 1 3 36 0.000914 0.9144 91.44 914.4 914,400 914,400,000
1 foot = 0.000189 0.333333 1 12 0.000305 0.3048 30.48 304.8 304,800 304,800,000
1 inch = 0.000015783 0.027778 0.083333 1 0.0000254 0.0254 2.54 25.4 25,400 25,400,000
1 kilometer = 0.621371 1,094 3,281 39,370 1 1,000 100,000 1,000,000 1,000,000,000 1,000,000,000,000
1 meter = 0.000621 1.093613 3.28084 39.370079 0.001 1 100 1,000 1,000,000 1,000,000,000
1 centimeter = 0.0000062137 0.010936 0.032808 0.393701 0.000010 0.01 1 10 10,000 10,000,000
1 millimeter = 0.00000062137 0.001094 0.003281 0.03937 0.0000010 0.001 0.1 1 1,000 1,000,000
1 micrometer = 0.00000000062137 0.0000010936 0.0000032808 0.00003937 0.0000000010 0.0000010 0.0001 0.001 1 1,000
1 nanometer = 0.00000000000062137 0.0000000010936 0.0000000032808 0.00000003937 0.0000000000010 0.0000000010 0.00000010 0.0000010 0.001 1