Unit Converters

Length Converter

Enter a length, choose its unit and read every other unit at once.

By TheCalcTools Updated Formula checked and tested

Your numbers

Your results

Millimeters
Millimeters
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Centimeters
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Meters
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Kilometers
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Inches
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Feet
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Yards
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Miles
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Nautical miles
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Length Converter by TheCalcTools

How the Length Converter works

Type the length and pick the unit you are starting from.

Every other unit updates immediately.

All conversions go through meters using exact definitions: 1 inch = 0.0254 m.

The formula

result = value × (factor of the ‘from’ unit ÷ factor of the ‘to’ unit)1 in = 0.0254 m, 1 ft = 0.3048 m, 1 mi = 1,609.344 m, 1 nmi = 1,852 m

Worked example

Using the default values shown in the calculator:

Value100
FromKilometers
  1. 100 Kilometers equals 100000000.00 Millimeters ; 10000000.00 Centimeters ; 100000.00 Meters.

Result:

Millimeters100000000.00
Centimeters10000000.00
Meters100000.00
Kilometers100.0000
Inches3937007.87
Feet328083.99
Yards109361.33
Miles62.1371
Nautical miles53.9957

Frequently asked questions

How many feet are in a mile?

5,280 feet. The international mile is exactly 1,609.344 meters and the foot exactly 0.3048 meters.

What is a nautical mile?

Exactly 1,852 meters, originally one minute of latitude. It is used in aviation and at sea.

Sources and further reading

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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.