Home › Length Length Converter Convert between metric, US and imperial units of length, plus nautical, astronomical, typographic and historical measures such as the cubit, furlong, Roman mile, toise and shaku.
Many historical units had values that differed by place and century. Where a unit is marked approximate, this site uses the most commonly cited modern equivalent.
Popular length conversions Common units Other units Unit Symbol Value in meters picometer pm 1×10⁻¹² m femtometer fm 1×10⁻¹⁵ m decimeter dm 0.1 m hectometer hm 100 m decameter dam 10 m thou thou 0.0000254 m point pt 0.0003527777778 m pica pc 0.004233333333 m twip twip 0.00001763888889 m astronomical unit au 149,597,870,700 m light-second ls 299,792,458 m light-minute lmin 17,987,547,480 m light-hour lh 1,079,252,848,800 m parsec pc 3.085677581×10¹⁶ m megaparsec Mpc 3.085677581×10²² m
Historical and traditional units Unit Symbol Value in meters angstrom Å 1×10⁻¹⁰ m fathom ftm 1.8288 m cable length cb 185.2 m league lea 4,828.032 m nautical league nlea 5,556 m furlong fur 201.168 m chain ch 20.1168 m rod rd 5.0292 m link li 0.201168 m hand hh 0.1016 m barleycorn bc 0.008466666667 m palm palm 0.0762 m span span 0.2286 m cubit cbt ≈ 0.4572 m ell ell 1.143 m US survey foot ft (US) 0.3048006096 m US survey mile mi (US) 1,609.347219 m stadion stad ≈ 192 m Roman inch (uncia) uncia ≈ 0.0246 m Roman foot pes ≈ 0.296 m Roman cubit cubitum ≈ 0.444 m Roman pace passus ≈ 1.48 m Roman stadium stadium ≈ 185 m Roman mile mp ≈ 1,480 m Roman league leuga ≈ 2,220 m Greek foot (Olympic) pous ≈ 0.32 m royal cubit cubit ≈ 0.525 m Egyptian palm palm ≈ 0.075 m Egyptian finger digit ≈ 0.01875 m khet khet ≈ 52.5 m biblical cubit cubit ≈ 0.54 m Sabbath day's journey sabbath ≈ 1,080 m sun sun 0.0303030303 m shaku shaku 0.303030303 m ken ken 1.818181818 m jō jō 3.03030303 m chō chō 109.0909091 m ri (Japanese) ri 3,927.272727 m fen (Chinese) fen 0.003333333333 m cun (Chinese) cun 0.03333333333 m chi (Chinese) chi 0.3333333333 m zhang (Chinese) zhang 3.333333333 m li (Chinese) li 500 m vershok vershok 0.04445 m arshin arshin 0.7112 m sazhen sazhen 2.1336 m verst verst 1,066.8 m ligne ligne 0.002255829062 m pouce pouce 0.02706994875 m pied du roi pied 0.324839385 m toise toise 1.94903631 m lieue (Paris league) lieue 3,898.07262 m vara (Castilian) vara ≈ 0.8359 m legua (Castilian) legua ≈ 5,572.666667 m wa (Thai) wa 2 m sen (Thai) sen 40 m Scandinavian mil mil 10,000 m