Centimeters to inches

1 centimeter = 0.393701 inches

Type a value in centimeters (cm) to get inches (in) straight away. A centimeter is smaller than an inch, so the number goes down. Both units belong to length, measured here against the meter.

FromTo0.39370079

1 cm = 0.39370079 in

Formula

in = cm × 0.39370079

One centimeter is 0.39370079 inches, so multiply by that factor. You can also divide by 2.54, the number of centimeters in one inch. Here cm is the value in centimeters and in is the result in inches.

Worked example: 170 centimeters × 0.39370079 = 66.9291 inches.

Centimeters to inches table

centimeters (cm)	inches (in)
1 cm	0.393701 in
2 cm	0.787402 in
3 cm	1.1811 in
4 cm	1.5748 in
5 cm	1.9685 in
6 cm	2.3622 in
7 cm	2.75591 in
8 cm	3.14961 in
9 cm	3.54331 in
10 cm	3.93701 in
15 cm	5.90551 in
20 cm	7.87402 in
25 cm	9.84252 in
30 cm	11.811 in
40 cm	15.748 in
50 cm	19.685 in
60 cm	23.622 in
75 cm	29.5276 in
100 cm	39.3701 in

Everyday centimeters in inches

What it is	cm	in
a postage stamp (about)	2.5 cm	0.984252 in
a school ruler	30 cm	11.811 in
a standard interior door width	90 cm	35.4331 in
5 ft in height	152 cm	59.8425 in
a tall adult	180 cm	70.8661 in

Quick estimate in your head

Multiply by about 0.39. For 170 cm that gives 66.3 in against an exact 66.9291 in, an error of 0.9%.

About the units

Centimeter (cm). One hundredth of a meter. The usual metric unit for height, clothing and small objects.

Inch (in). Exactly 2.54 cm since the 1959 international yard agreement. Common for screens, tyres and pipes.

Going the other way, 1 inch is 2.54 centimeters.

Questions

How many inches are in 1 centimeter?

1 centimeter is 0.393701 inches, and 1 inch is 2.54 centimeters.

How do I convert centimeters to inches?

Use in = cm × 0.39370079. For example, 170 centimeters × 0.39370079 = 66.9291 inches.

Is the centimeter to inch factor exact?

The factor comes from the unit definitions. Results here are rounded to 6 significant digits for display.

How much is a tall adult in inches?

180 cm is 70.8661 in.

Source for the conversion factor: NIST SP 811, Appendix B (conversion factors).

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