Length converters
Convert between centimeters, meters, inches, feet, and every other length unit. Whether you're sizing a phone, hanging a shelf, or planning a road trip, the math is one tap away.
9 units72 conversions
Length›cm → in
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1 cm=
0.393701in
formula1 cm = 0.393701 in
Popular in length
Centimeters to Inches
1 cm = 0.393701 in
Inches to Centimeters
1 in = 2.54 cm
Meters to Feet
1 m = 3.28084 ft
Feet to Meters
1 ft = 0.3048 m
Kilometers to Miles
1 km = 0.621371 mi
Miles to Kilometers
1 mi = 1.60934 km
Millimeters to Centimeters
1 mm = 0.1 cm
Millimeters to Meters
1 mm = 0.001 m
Millimeters to Kilometers
1 mm = 1.0000e-6 km
Millimeters to Inches
1 mm = 0.0393701 in
All length conversions
72 pairsEvery unit pair in this category. Tap any cell to open that conversion.
| from \ to | mmMillimeters | cmCentimeters | mMeters | kmKilometers | inInches | ftFeet | ydYards | miMiles | nmiNautical Miles |
|---|---|---|---|---|---|---|---|---|---|
| mmMillimeters | — | × 0.1 | × 0.001 | × 1.0000e-6 | × 0.0393701 | × 0.00328084 | × 0.00109361 | × 6.2137e-7 | × 5.3996e-7 |
| cmCentimeters | × 10 | — | × 0.01 | × 1.0000e-5 | × 0.393701 | × 0.0328084 | × 0.0109361 | × 6.2137e-6 | × 5.3996e-6 |
| mMeters | × 1,000 | × 100 | — | × 0.001 | × 39.3701 | × 3.28084 | × 1.09361 | × 0.000621371 | × 0.000539957 |
| kmKilometers | × 1,000,000 | × 100,000 | × 1,000 | — | × 39,370.1 | × 3,280.84 | × 1,093.61 | × 0.621371 | × 0.539957 |
| inInches | × 25.4 | × 2.54 | × 0.0254 | × 2.5400e-5 | — | × 0.0833333 | × 0.0277778 | × 1.5783e-5 | × 1.3715e-5 |
| ftFeet | × 304.8 | × 30.48 | × 0.3048 | × 0.0003048 | × 12 | — | × 0.333333 | × 0.000189394 | × 0.000164579 |
| ydYards | × 914.4 | × 91.44 | × 0.9144 | × 0.0009144 | × 36 | × 3 | — | × 0.000568182 | × 0.000493737 |
| miMiles | × 1,609,340 | × 160,934 | × 1,609.34 | × 1.60934 | × 63,360 | × 5,280 | × 1,760 | — | × 0.868976 |
| nmiNautical Miles | × 1,852,000 | × 185,200 | × 1,852 | × 1.852 | × 72,913.4 | × 6,076.12 | × 2,025.37 | × 1.15078 | — |
Each cell shows the multiplier from row → column. e.g. 1 mm × n = result in column units.
About length units
Common length units
Centimeter (cm)
One hundredth of a meter. The friendliest measure for everyday objects — phones, pencils, fingertips. The metric world’s default for human-scale things.
Meter (m)
The SI base unit of length, originally defined as one ten-millionth of the distance from the equator to the North Pole. Today it’s pegged to the speed of light.
Inch (in)
One twelfth of a foot, or exactly 2.54 cm. Still the standard for screens, lumber, and shipping in the United States.
Foot (ft)
12 inches, or 30.48 cm. Used for human height, ceiling heights, and most US construction.
Kilometer (km)
1,000 meters. The metric road-trip unit — everywhere except the US, UK, and Liberia.
Mile (mi)
5,280 feet, or 1.609 km. The dominant unit on US and UK road signs and odometers.
Metric vs imperial — the short version
The metric system uses powers of ten: a kilometer is 1,000 meters, a centimeter is one hundredth. Conversions are mental math. The imperial system uses historical factors: 12 inches to the foot, 3 feet to the yard, 1,760 yards to the mile. The math is harder, but the units are tuned to body-scale things — a foot is roughly a foot, an inch is roughly a thumb-width.
Frequently asked
How many inches are in a centimeter?
One centimeter equals 0.3937 inches. Conversely, one inch equals exactly 2.54 centimeters.
What is the easiest way to estimate cm to inches?
Divide the number of centimeters by 2.5. It’s about 1% off but close enough for clothing or rough measuring.
Is a meter longer than a yard?
Yes, slightly. One meter is about 1.094 yards, or 3.28 feet.
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