Length Converter

Free online length converter

Popular length conversions

Length measures distance. The SI base unit is the meter (m). Legacy units like inch (in) and foot (ft) remain popular in trade and construction.

Centimeter (cm) (cm)
A centimeter is 1/100 m; common in clothing sizes, furniture dimensions, and small-scale drawings.
Chain (ch) (ch)
Common length unit used in science, engineering, and daily life.
Foot (ft) (ft)
The foot is exactly 0.3048 m. Still used in construction, aviation (runways) and height measurements.
Furlong (fur) (fur)
Common length unit used in science, engineering, and daily life.
Inch (in) (in)
An inch is exactly 25.4 mm since 1959, used widely in engineering, manufacturing, and consumer products.
Kilometer (km) (km)
A kilometer is 1,000 m; the default unit for road signs and mapping globally.
Meter (m) (m)
The meter is the SI base unit of length, defined via the speed of light (c = 299,792,458 m/s).
Mile (mi) (mi)
The international mile is exactly 1,609.344 m. Derived from the Roman mile (mille passus).
Millimeter (mm) (mm)
A millimeter is 1/1000 m, used in precision engineering and manufacturing.
Nautical mile (nmi) (nmi)
A nautical mile is exactly 1,852 m, corresponding to one minute of arc on Earth’s surface.
Rod (rd) (rd)
Common length unit used in science, engineering, and daily life.
Yard (yd) (yd)
A yard is exactly 0.9144 m. Common in sports (football fields) and textiles.

Is length conversion exact?

Many conversions are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).

Can I share a specific result?

Yes. Every converter has a clean, shareable URL like /convert/meter-to-foot/2.5.