Length Units

Find the right formula and tools for all length units. We use official rules to make sure every calculation is correct.

All Length Unit Pairs

Pick a starting unit to see all possible conversion tools for length.

Our Standard Unit: Meters (m)

We calculate all length units based on the standard Meters (m). This helps us keep all our tools accurate and reliable.

Conversion Formulas

Below is the list of rules we use to calculate each length unit. You can use these to understand the math behind our tools.

Kilometers (km)

Formula: 1 Kilometers = 1000 Meters
To do the math instantly, use our kilometers to meters or meters to kilometers tools.

Centimeters (cm)

Formula: 1 Centimeters = 0.01 Meters
To do the math instantly, use our centimeters to meters or meters to centimeters tools.

Millimeters (mm)

Formula: 1 Millimeters = 0.001 Meters
To do the math instantly, use our millimeters to meters or meters to millimeters tools.

Micrometers (µm)

Formula: 1 Micrometers = 0.000001 Meters
To do the math instantly, use our micrometers to meters or meters to micrometers tools.

Nanometers (nm)

Formula: 1 Nanometers = 1e-9 Meters
To do the math instantly, use our nanometers to meters or meters to nanometers tools.

Picometers (pm)

Formula: 1 Picometers = 1e-12 Meters
To do the math instantly, use our picometers to meters or meters to picometers tools.

Megameters (Mm)

Formula: 1 Megameters = 1000000 Meters
To do the math instantly, use our megameters to meters or meters to megameters tools.

Gigameters (Gm)

Formula: 1 Gigameters = 1000000000 Meters
To do the math instantly, use our gigameters to meters or meters to gigameters tools.

Inches (in)

Formula: 1 Inches = 0.0254 Meters
To do the math instantly, use our inches to meters or meters to inches tools.

Feet (ft)

Formula: 1 Feet = 0.3048 Meters
To do the math instantly, use our feet to meters or meters to feet tools.

Yards (yd)

Formula: 1 Yards = 0.9144 Meters
To do the math instantly, use our yards to meters or meters to yards tools.

Miles (mi)

Formula: 1 Miles = 1609.344 Meters
To do the math instantly, use our miles to meters or meters to miles tools.

Furlongs (fur)

Formula: 1 Furlongs = 201.168 Meters
To do the math instantly, use our furlongs to meters or meters to furlongs tools.

Chains (ch)

Formula: 1 Chains = 20.1168 Meters
To do the math instantly, use our chains to meters or meters to chains tools.

Fathoms (fath)

Formula: 1 Fathoms = 1.8288 Meters
To do the math instantly, use our fathoms to meters or meters to fathoms tools.

Nautical Miles (nmi)

Formula: 1 Nautical Miles = 1852 Meters
To do the math instantly, use our nautical miles to meters or meters to nautical miles tools.

Astronomical Units (AU)

Formula: 1 Astronomical Units = 149597870700 Meters
To do the math instantly, use our astronomical units to meters or meters to astronomical units tools.

Light Years (ly)

Formula: 1 Light Years = 9460730472580800 Meters
To do the math instantly, use our light years to meters or meters to light years tools.

Parsecs (pc)

Formula: 1 Parsecs = 30856775800000000 Meters
To do the math instantly, use our parsecs to meters or meters to parsecs tools.

Points (pt)

Formula: 1 Points = 0.000352778 Meters
To do the math instantly, use our points to meters or meters to points tools.

Picas (pica)

Formula: 1 Picas = 0.004233333 Meters
To do the math instantly, use our picas to meters or meters to picas tools.

All Systems

Compare these units against other measurement systems on our homepage.

All Unit Conversion Systems

Access our high-fidelity calculators for other measurement systems and engineering metrics.