Conversion tool

CM to inches converter

Convert centimeters to inches by dividing by 2.54, or convert inches to centimeters by multiplying by 2.54. Enter a value in either field below for an exact two-way conversion, then use the calibrated online ruler when you need to check an item on screen.

Convert cm and inches

The formula

inches = centimeters ÷ 2.54

The inch is defined as exactly 2.54 cm, so this conversion is exact. To go the other way, multiply inches by 2.54.

CM to inches chart

CentimetersInches (exact)Inches (rounded)
1 cm0.3937 in0.39 in
2 cm0.7874 in0.79 in
3 cm1.1811 in1.18 in
5 cm1.9685 in1.97 in
10 cm3.9370 in3.94 in
15 cm5.9055 in5.91 in
20 cm7.8740 in7.87 in
25 cm9.8425 in9.84 in
30 cm11.8110 in11.81 in
50 cm19.6850 in19.69 in
100 cm39.3701 in39.37 in

CM to inches FAQ

How do you convert cm to inches?+

Divide the centimeter value by 2.54, because one inch equals exactly 2.54 centimeters. For example, 10 cm ÷ 2.54 = 3.94 inches.

How many inches is 1 cm?+

One centimeter equals about 0.3937 inches, which is just under four tenths of an inch.

How many inches is 10 cm?+

10 cm equals about 3.94 inches, a little under 4 inches.

Is 2.54 cm exactly 1 inch?+

Yes. The inch is defined as exactly 2.54 centimeters, so the conversion is exact rather than an approximation.

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