Free online length converter. Convert meters, kilometers, miles, feet and inches instantly with exact factors and a reference table. No sign-up.
This length converter lets you convert any length or distance unit — meters, kilometers, miles, feet, inches and more — in a single click, using the exact conversion factors certified by the BIPM. Whether you need a quick length conversion for a recipe, a construction measurement, or a map distance, the result updates instantly as you type. Length is one of the seven fundamental physical quantities in the International System of Units, and probably the oldest one humanity learned to measure. Long before the metre existed, civilizations used body parts as reference — the "foot," the "cubit" (from elbow to fingertip), and the "inch" all emerged this way, which explains why the imperial system still feels so illogical to anyone who grew up with the metric one. The modern metre was born from an ambitious idea of the French Revolution: define a unit based on the planet itself, equal to one ten-millionth of the distance between the North Pole and the equator, measured along the meridian passing through Paris. That definition has changed several times since then — today the metre is defined by the distance light travels in a vacuum during a specific time interval, a standard so precise it doesn't depend on any physical object that could wear down or vary. This converter uses the exact conversion factors certified by the International Bureau of Weights and Measures (BIPM), the same body responsible for maintaining the official definitions of every SI unit. This matters in practice: a small rounding error in length conversions can mean a structural mistake on a construction site, an incompatible imported mechanical part, or a wrong hotel booking because of a map measured in miles. Every conversion here is calculated with the same precision used in metrology labs.
A length converter is a tool that translates a distance value from one unit of length to another — for example meters to feet or miles to kilometers — using the exact conversion factors defined by the International System of Units.
Pick the source unit (e.g. meters) and the target unit (e.g. feet), enter the value, and the length converter applies the exact factor instantly. 1 m = 3.28084 ft, 1 mile = 1.60934 km.
Divide the value in meters by 1000.
1 meter equals 39.3701 inches.
Multiply the value in miles by 1.60934.
A land mile is 1.609 km, while a nautical mile (knot) equals 1.852 km.
Yes, completely free and with no registration required.
1 inch equals exactly 2.54 centimeters.
1 meter is approximately 3.28084 feet.
Multiply kilometers by 0.621371. Example: 10 km ≈ 6.21 miles.
A statute mile is about 1.609 km; a nautical mile is 1.852 km and is used in navigation and aviation.
1 yard = 0.9144 meters (exact).