Length Converter

Convert between length units including meters, feet, inches, miles, kilometers, yards, and more. Free online converter.

Last updated: June 1, 2026

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What is Length Converter?

A length converter translates measurements between metric (millimeters, centimeters, meters, kilometers) and imperial (inches, feet, yards, miles) systems, plus specialized units like nautical miles. With most of the world using metric and the US primarily using imperial, conversion is a constant need in international business, engineering, construction, and everyday life. This tool handles all common conversions with precision appropriate to each unit.

How It Works

Enter a value and select the source and target units. The tool converts through a common base unit (meters), applying precise conversion factors: 1 inch = 0.0254 meters, 1 foot = 0.3048 meters, 1 mile = 1609.344 meters, etc. Results display with appropriate decimal precision based on the magnitude of the converted value. The tool handles very small (micrometer) to very large (astronomical unit) measurements correctly.

Quick Reference

Metric	Imperial	Conversion
1 cm	0.394 inches	1 inch = 2.54 cm
1 meter	3.281 feet	1 foot = 0.3048 m
1 km	0.621 miles	1 mile = 1.609 km
30 cm	11.81 inches	1 foot = 12 inches
100 m	109.36 yards	1 yard = 0.9144 m

Common Use Cases

•Converting architectural measurements between metric and imperial for international projects
•Translating product dimensions from international suppliers using different measurement systems
•Converting running distances between miles and kilometers for fitness tracking
•Translating engineering specifications between metric and imperial systems
•Converting map distances and travel measurements for trip planning
•Translating fabric, lumber, and material measurements for DIY projects and construction