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Length converter

Centimeters, inches, feet, meters, miles and more, converted exactly.

Result

≈ 0.3937007874 in

1 centimeter = about 0.393700787402 inches

How we got this

  1. 1 centimeter = about 0.393700787402 inches
  2. Multiply: 1 × 0.393700787402… ≈ 0.3937007874 in
The same value in every unit
millimeters10 mm
centimeters1 cm
meters0.01 m
kilometers0.00001 km
inches≈ 0.3937007874 in
feet≈ 0.03280839895 ft
yards≈ 0.01093613298 yd
miles≈ 0.000006213711922 mi
nautical miles≈ 0.000005399568035 nmi

Worked out on your device. Nothing is sent anywhere.

Common conversions

Centimeters to inches
Centimeters (cm)Inches (in)
1≈ 0.3937007874
2≈ 0.7874015748
5≈ 1.968503937
10≈ 3.937007874
15≈ 5.905511811
20≈ 7.874015748
30≈ 11.81102362
50≈ 19.68503937
100≈ 39.37007874
Inches to centimeters
Inches (in)Centimeters (cm)
12.54
25.08
37.62
410.16
615.24
820.32
1025.4
1230.48
2460.96
Feet to meters
Feet (ft)Meters (m)
10.3048
20.6096
30.9144
51.524
61.8288
103.048
206.096
5015.24
10030.48
Miles to kilometers
Miles (mi)Kilometers (km)
11.609344
23.218688
34.828032
58.04672
1016.09344
13.121.0824064
26.242.1648128
5080.4672
100160.9344

The definitions

Since 1959 the inch has been defined as exactly 2.54 centimeters, which fixes every US length unit in metric terms: a foot (12 inches) is exactly 30.48 cm, a yard (3 feet) is 0.9144 m, and a mile (5,280 feet) is 1,609.344 m. A nautical mile, used at sea and in the air, is exactly 1,852 m.

Because these are exact, conversions here are too: 100 inches is 254 cm with nothing rounded. Going the other way usually isn’t a whole number (1 cm is 0.393700787… inches), so those answers are rounded to 10 significant digits and marked with ≈.

Questions

How many centimeters are in an inch?

Exactly 2.54. To turn inches into centimeters multiply by 2.54; to turn centimeters into inches divide by 2.54 (or multiply by about 0.3937).

How do I convert my height in feet and inches to centimeters?

Turn it into inches first, then multiply by 2.54. 5 ft 9 in is 5 × 12 + 9 = 69 inches, and 69 × 2.54 = 175.26 cm.

How many feet are in a mile?

5,280 feet, or 1,760 yards. A kilometer is about 0.621 miles, so a 5K run is about 3.1 miles.

What happened to the US survey foot?

It was retired at the end of 2022. It was 1200/3937 of a meter, about 2 parts per million longer than the international foot, and mattered only for land surveying. Every foot on this site is the international foot.

Is anything I enter sent anywhere?

No. Conversions are worked out in your browser. The value and units appear in the page address only so you can bookmark or share them.

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