Length Converter

Length is the unit category with the widest range of genuinely distinct units still in real use, and this converter covers 37 of them — not just meters, feet, and miles, but the units that sit between and beyond them: nautical miles and cable lengths for anyone working with maritime or aviation distances, rods, chains, and furlongs for land surveying and old deeds, points and picas for typography, and astronomical units, light-years, and parsecs at the other end of the scale entirely. Whatever the source of a measurement — a recipe, a blueprint, a old land record, a science article — there's a decent chance the unit it uses is in here.

Type a value into either field and the other updates immediately; the swap button flips direction if you entered it backwards. Every factor is a verified conversion to meters as the common base unit, so chaining through, say, inches to chains to kilometers stays accurate rather than compounding rounding errors the way some converters do when they convert through a series of approximate ratios.

For the specific pairs people look up most often — kilometers to miles, centimeters to inches, meters to feet — dedicated single-pair pages are linked in the "Common conversions" section below, each preloaded to that exact conversion with a quick reference table. Everything here runs as plain arithmetic in your browser; there's no external service being queried, and nothing about what you're converting is recorded or sent anywhere.