Length Converter
Convert length between meters, feet, miles, kilometers, inches, centimeters, yards, and nautical miles. Instant results — useful for travel, construction, and international unit conversion.
Millimeters (mm)
100000
Centimeters (cm)
10000
Meters (m)
100
Kilometers (km)
0.1
Inches (in)
3937.0079
Feet (ft)
328.08399
Yards (yd)
109.36133
Miles (mi)
0.062137119
Nautical miles
0.05399568
How to use the length converter
Enter a value, pick the unit it represents, and every other unit updates simultaneously. Useful for travel, construction, or anywhere you need to convert between metric and imperial.
Formula & explanation
All units convert through meters as the base. Each unit has a constant factor (e.g., 1 ft = 0.3048 m). Conversions are exact for SI units and use the international yard/foot agreement of 1959.
Examples
100 m = 328.084 ft = 109.361 yd = 0.0621 mi. 1 mile = 1609.344 m = 1.609 km. 1 inch = 25.4 mm exactly.
Frequently asked questions
- How many feet are in a meter?
- 1 meter = 3.28084 feet. Conversely, 1 foot = 0.3048 meters exactly — this has been the international definition since 1959.
- How many kilometers are in a mile?
- 1 mile = 1.60934 km. A quick mental approximation: multiply miles by 1.6 to get km, or divide km by 1.6 to get miles.
- What's a nautical mile?
- 1 nautical mile = 1852 meters exactly. It corresponds to 1 arcminute of latitude and is used in maritime and aviation navigation.
- Why is the value not exactly equal when I round-trip?
- Floating-point arithmetic introduces tiny rounding errors. We display 6 significant digits; the underlying value may vary in the last few decimal places.
Related unit converters tools
- Area ConverterConvert area between square meters, square feet, acres, hectares, square kilometers, and square miles. Useful for real estate, land measurement, and engineering projects.
- Energy ConverterConvert energy between joules, calories, kilocalories, kilowatt-hours, BTU, and electron volts. Useful for physics, nutrition, and engineering calculations.
- Weight ConverterConvert weight between kilograms, pounds, ounces, grams, stones, and metric tons. Handles both metric and imperial units — useful for cooking, shipping, and fitness tracking.
- Volume ConverterConvert volume between liters, gallons, milliliters, cubic meters, fluid ounces, cups, and pints. Handles both US and UK gallons — useful for cooking, chemistry, and engineering.
- Temperature ConverterConvert temperature between Celsius, Fahrenheit, and Kelvin with instant results. Includes common reference points — freezing, body temperature, boiling — for quick sanity checks.
- Speed ConverterConvert speed between mph, km/h, knots, m/s, and feet per second. Useful for travel, aviation, maritime, and physics — handles all common speed units instantly.