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Length conversions

Every length unit on the site, and every conversion between them. Each page shows a full table, the exact formula and a live calculator.

All length units

Every length unit and its size relative to the base unit.
Unit Symbol In meter
meter m 1
kilometer km 1,000
centimeter cm 0.01
millimeter mm 0.001
micrometer µm 0.000001
nanometer nm 1 × 10^-9
mile mi 1,609.344
yard yd 0.9144
foot ft 0.3048
inch in 0.0254
nautical mile nmi 1,852
light-year ly 9.460730473 × 10^15
astronomical unit AU 149,597,870,700
furlong fur 201.168
fathom ftm 1.8288
hand hh 0.1016

Common conversions

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures

How these figures are compiled and checked