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Length Converter - Online Distance & Metric Imperial Unit Tool

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Length Converter

Quickly convert distances between metric, imperial, nautical, and astronomical units.

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Common Length Conversions
Imperial / OtherMetricPrecise Factor
1 inch2.54 cm0.0254 m
1 foot30.48 cm0.3048 m
1 yard0.9144 m0.9144 m
1 mile1.60934 km1609.344 m
1 nautical mile1.852 km1852 m
1 light year9.461 Ă— 1015 m9.4607Ă—1015 m
1 astronomical unit1.496 Ă— 1011 m1.49598Ă—1011 m
1 parsec3.086 Ă— 1016 m3.08568Ă—1016 m
1 kilometer1000 m1000 m
1 centimeter0.01 m0.01 m
Frequently Asked Questions

Multiply the number of miles by 1.609344. For example, 5 miles = 5 Ă— 1.609344 = 8.04672 km. You can use the converter above by selecting mile as input and kilometer as output.

A statute (land) mile is exactly 1609.344 meters (5280 feet). A nautical mile is based on the Earth's circumference and equals exactly 1852 meters. It is used in marine and air navigation.

One inch is defined as exactly 2.54 centimeters. This standard was internationally adopted in 1959.

Yes! A light year is the distance light travels in one year, approximately 9.461 Ă— 1012 kilometers. Our tool supports light years as both input and output.

When converting between extremely small (nanometers) and huge (parsecs) units, the result may be very large or very small. We automatically switch to scientific notation (e.g., 2.5e-9) for better readability and accuracy.

Absolutely. This online tool is completely free, requires no sign-up, and works instantly in your browser. You can convert any combination of units as many times as you need.
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