Length Converter

Use this free online converter to easily convert between units for measuring length. Metric and imperial units for measuring length are supported.

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What units of length are supported?

This versatile length converter supports conversions between imperial units, between metric units, as well as converts between metric and imperial, and vice versa. You can convert units used for measuring tiny lengths such as millimeters (mm), micrometers (μm), and nanometers (nm), small lengths like inches (in), feet (ft), yards (yd), centimeters (cm), decimeters (dm), and meters (m) as well as very large lengths measured in miles (mi), kilometers (km), and the more rarely used nautical miles (M) and leagues (lea).

Conversion is supported both between metric (e.g. meters to centimeters, centimeters to meters, etc.) and between imperial units (e.g. feet to yards, yards to feet, inches to feet, feet to inches, etc.) as well as between measurement systems, for example feet to meters, meters to feet, meters to yards, yards to meters, and so on.

The online length converter uses definitions for the units of length as they are established by international treaty in 1959 and as defined by the International System of Units (SI) [1] whose definitions are followed universally around the world. It is also in accord with the ISO standards for quantities and units [2]. The symbol convention is the one defined by SI. In some locations the standards may not be followed on a regular basis, e.g. the same symbol: "m", may be used for both miles and meters, causing potential confusion.

The conversion output is accurate to nine decimal places: more than enough for most applications where a length converter is needed.

Imperial vs. Metric units of length

Since 1959 both metric and imperial units of length are defined using the standard meter as a base unit. Imperial units are currently in official use in the United States, United Kingdom, and a couple of other countries in the world, while the metric system is official in the rest of the world. There are some examples where, due to the historical development of the industry, Imperial units are used instead of metric ones, almost universally. Such an example is the consumer electronics market, especially screen/display/monitor sizes which are often expressed in inches instead of centimeters or millimeters.

With those exceptions, the utility and ease of use of the metric system makes it the preferred choice in everyday life, science, and engineering.

Length conversion examples

There are many possible conversions between the metrics supported in our metric converter above. Some selected examples follow.

Feet to Yard conversion example

Sample task: convert 10 feet to yards. Solution:

Formula:
ft / 3 = yd
Calculation:
10 ft / 3 = 3.333333 yd
End result:
10 ft is equal to 3.333333 yd


Meters to Yards conversion example

Sample task: convert 6 yards to meters. Solution:

Formula:
yd * 0.9144 = m
Calculation:
6 yd * 0.9144 = 5.4864 m
End result:
6 yd is equal to 5.4864 m

Meters to Feet conversion example

Sample task: convert 5 meters to feet. Solution:

Formula:
m / 0.3048 = ft
Calculation:
5 m / 0.3048 = 16.404199 ft
End result:
5 m is equal to 16.404199 ft

Length conversion tables

Below are conversion tables for some of the most used pairs of units of length you can use for quick reference. Using our length converter above you can construct your own tables for the odd case when you need a quick reference and you do not have access to an internet connection. Our converter also works offline: you can use it as long as the page is cached in your browser.

Meters to feet conversion table:

m to ft conversion table
m ft
1 m 3.280840 ft
2 m 6.561680 ft
3 m 9.842520 ft
4 m 13.123360 ft
5 m 16.404199 ft
6 m 19.685039 ft
7 m 22.965879 ft
8 m 26.246719 ft
9 m 29.527559 ft
10 m 32.808399 ft
20 m 65.616798 ft
30 m 98.425197 ft
40 m 131.233596 ft
50 m 164.041995 ft
60 m 196.850394 ft
70 m 229.658793 ft
80 m 262.467192 ft
90 m 295.275591 ft
100 m 328.083990 ft

Feet to meters conversion table:

ft to m conversion table
ft m
1 ft 0.304800 m
2 ft 0.609600 m
3 ft 0.914400 m
4 ft 1.219200 m
5 ft 1.524000 m
6 ft 1.828800 m
7 ft 2.133600 m
8 ft 2.438400 m
9 ft 2.743200 m
10 ft 3.048000 m
20 ft 6.096000 m
30 ft 9.144000 m
40 ft 12.192000 m
50 ft 15.24 m
60 ft 18.288000 m
70 ft 21.336000 m
80 ft 24.384000 m
90 ft 27.432000 m
100 ft 30.48 m

Inches to cm conversion table:

in to cm conversion table
in cm
1 in 2.54 cm
2 in 5.08 cm
3 in 7.62 cm
4 in 10.16 cm
5 in 12.70 cm
6 in 15.24 cm
7 in 17.78 cm
8 in 20.32 cm
9 in 22.86 cm
10 in 25.40 cm
20 in 50.80 cm
30 in 76.20 cm
40 in 101.60 cm
50 in 127 cm
60 in 152.40 cm
70 in 177.80 cm
80 in 203.20 cm
90 in 228.60 cm
100 in 254 cm

Centimeters to inches conversion table:

cm to in conversion table
cm in
1 cm 0.393701 in
2 cm 0.787402 in
3 cm 1.181102 in
4 cm 1.574803 in
5 cm 1.968504 in
6 cm 2.362205 in
7 cm 2.755906 in
8 cm 3.149606 in
9 cm 3.543307 in
10 cm 3.937008 in
20 cm 7.874016 in
30 cm 11.811024 in
40 cm 15.748031 in
50 cm 19.685039 in
60 cm 23.622047 in
70 cm 27.559055 in
80 cm 31.496063 in
90 cm 35.433071 in
100 cm 39.370079 in

References:

[1] NIST Special Publication 330 (2008) - "The International System of Units (SI)", edited by Barry N.Taylor and Ambler Thompson

[2] International Organization for Standardization (1993). ISO Standards Handbook: Quantities and units (3rd edition). Geneva: ISO. ISBN 92-67-10185-4.

Cite this converter & page

If you'd like to cite this online converter resource and information as provided on the page, you can use the following citation:
Georgiev G.Z., "Length Converter", [online] Available at: https://www.gigacalculator.com/converters/length-converter.php URL [Accessed Date: 20 Oct, 2019].