Length Conversions
8 units · 56 converters
Convert between metric and imperial length units: meters, kilometers, inches, feet, yards and miles. Instant results with exact internationally defined factors.
Millimeter(mm)
A millimeter is one thousandth of a meter, the smallest length unit in everyday metric use. It is the standard precision unit in engineering drawings, machining and rainfall measurement.
Centimeter(cm)
A centimeter is one hundredth of a meter, roughly the width of a fingernail. It is the everyday unit for body measurements, clothing sizes and small objects in metric countries.
Meter(m)
The meter is the SI base unit of length, defined since 1983 as the distance light travels in a vacuum in 1/299,792,458 of a second. It is the foundation of the metric system worldwide.
Kilometer(km)
A kilometer equals 1,000 meters and is the standard metric unit for road distances and geography. One kilometer is about 0.62 miles or a 12-minute walk.
Inch(in)
An inch is a unit of the imperial and US customary systems, legally defined as exactly 25.4 millimeters since 1959. It is used for screen sizes, tools and construction in the United States.
Foot(ft)
A foot is an imperial unit defined as exactly 0.3048 meters, or 12 inches. It remains the common unit for human height, room dimensions and altitude in the US and UK.
Yard(yd)
A yard equals exactly 0.9144 meters, or 3 feet. It is used in American football, golf, fabric sales and cricket pitch measurements.
Mile(mi)
The international mile is defined as exactly 1,609.344 meters, or 5,280 feet. It is the standard road distance unit in the United States and the United Kingdom.