Length Converter

Convert metric, imperial, nautical, astronomical, and engineering length units instantly.

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1 meter [m] = 0.001 kilometer [km]

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All length units

Unit	Symbol	Conversion factor	Quick links
meter	m	Base unit	Reference unit
kilometer	km	1 kilometer [km] = 1000 m	to m from m
decimeter	dm	1 decimeter [dm] = 0.1 m	to m from m
centimeter	cm	1 centimeter [cm] = 0.01 m	to m from m
millimeter	mm	1 millimeter [mm] = 0.001 m	to m from m
micrometer	µm	1 micrometer [µm] = 0.000001 m	to m from m
nanometer	nm	1 nanometer [nm] = 1E-9 m	to m from m
picometer	pm	1 picometer [pm] = 1E-12 m	to m from m
femtometer	fm	1 femtometer [fm] = 1E-15 m	to m from m
inch	in	1 inch [in] = 0.0254 m	to m from m
foot	ft	1 foot [ft] = 0.3048 m	to m from m
yard	yd	1 yard [yd] = 0.9144 m	to m from m
mile	mi	1 mile [mi] = 1609.344 m	to m from m
nautical mile	nmi	1 nautical mile [nmi] = 1852 m	to m from m
light year	ly	1 light year [ly] = 9.46073E+15 m	to m from m
astronomical unit	AU	1 astronomical unit [AU] = 149597870700 m	to m from m
parsec	pc	1 parsec [pc] = 3.085678E+16 m	to m from m
kiloparsec	kpc	1 kiloparsec [kpc] = 3.085678E+19 m	to m from m
megaparsec	Mpc	1 megaparsec [Mpc] = 3.085678E+22 m	to m from m
league	lea	1 league [lea] = 4828.032 m	to m from m
furlong	fur	1 furlong [fur] = 201.168 m	to m from m
chain	ch	1 chain [ch] = 20.1168 m	to m from m
rod	rd	1 rod [rd] = 5.0292 m	to m from m
fathom	fath	1 fathom [fath] = 1.8288 m	to m from m
link	li	1 link [li] = 0.201168 m	to m from m
hand	hh	1 hand [hh] = 0.1016 m	to m from m
mil	mil	1 mil [mil] = 0.000025 m	to m from m
microinch	µin	1 microinch [µin] = 2.54E-8 m	to m from m
angstrom	Å	1 angstrom [Å] = 1E-10 m	to m from m
point	pt	1 point [pt] = 0.000353 m	to m from m
pica	pc	1 pica [pc] = 0.004233 m	to m from m
twip	twip	1 twip [twip] = 0.000018 m	to m from m
caliber	cl	1 caliber [cl] = 0.000254 m	to m from m
centiinch	cin	1 centiinch [cin] = 0.000254 m	to m from m
Earth's equatorial radius	R⊕e	1 Earth's equatorial radius [R⊕e] = 6378137 m	to m from m
Sun's radius	R☉	1 Sun's radius [R☉] = 695700000 m	to m from m

Accuracy and Sources

Length factors use metre as the reference unit, with standardized metric and imperial relationships. Content was last reviewed on 2026-05-21. For safety-critical work, confirm results against the relevant official standard.

How length conversion works

Length conversion changes a measurement from one unit to another using a fixed factor or formula. Use the calculator above for instant results, then check the table and related converter links for common values.

Frequently Asked Questions

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What is the base unit for length?

The reference base unit used on this page is m.

Are these length conversions accurate?

Yes, the calculator uses the conversion factors listed on the page. For critical work, verify results with an authoritative standard.