Length Converter

Convert units in the length converter category with fast, accurate online tools.

About length units

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.

Browse common units in this category and learn where they are typically used.

Centimeter (cm) (cm)
A centimeter is 1/100 m; common in clothing sizes, furniture dimensions, and small-scale drawings.
Chain (ch) (ch)
Chain (ch) is a length unit used to measure distance, size, or dimensions in different systems.
Foot (ft) (ft)
The foot is exactly 0.3048 m. Still used in construction, aviation (runways) and height measurements.
Furlong (fur) (fur)
Furlong (fur) is a length unit used to measure distance, size, or dimensions in different systems.
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)
Rod (rd) is a length unit used to measure distance, size, or dimensions in different systems.
Yard (yd) (yd)
A yard is exactly 0.9144 m. Common in sports (football fields) and textiles.

Start with some of the most frequently used conversions in this category.

Open a few ready-made examples for common real-world conversions.

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.

Explore other measurement categories available on MeasureCalc.