Convert centimeters to inches instantly. This free cm to inches converter turns any cm value into inches as a decimal and a ruler-friendly fraction, plus mm, feet and metres.
Centimetres
cm
Enter a length in centimetres to convert it to inches. 1 inch = 2.54 cm exactly, so inches = cm ÷ 2.54.
Inches
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Enter a value in cm
Inches (fraction)
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Feet
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Millimetres
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Metres
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To convert centimetres to inches, divide by 2.54. For example, 30 cm ÷ 2.54 ≈ 11.81 inches. The fraction value rounds to the nearest 1/16 inch, which is handy for rulers and tape measures.
Use this free cm to inches converter to change any length in centimetres into inches instantly. Enter a value in cm to get inches as a decimal and as a ruler-friendly fraction.
How to convert cm to inches
To convert centimetres to inches, divide the number of centimetres by 2.54, because one inch equals exactly 2.54 cm.
inches = cm ÷ 2.54
For example, 30 cm ÷ 2.54 ≈ 11.81 inches, or about 11 13/16 inches on a tape measure.
CM to inches chart
Centimetres
Inches
1 cm
0.39 in
5 cm
1.97 in
10 cm
3.94 in
20 cm
7.87 in
30 cm
11.81 in
50 cm
19.69 in
100 cm
39.37 in
CM and inches explained
The inch is an imperial unit and the centimetre is metric. Since 1 inch = 2.54 cm by definition, the conversion is exact — divide by 2.54 to go from cm to inches, or multiply by 2.54 to go back.
How to use the converter
Type the length in centimetres.
Read the inches as a decimal.
Use the fraction, mm, feet or metres from the breakdown.
CM to Inches FAQ
How do I convert cm to inches?
Divide the number of centimeters by 2.54, since one inch equals exactly 2.54 cm. For example, 30 cm ÷ 2.54 ≈ 11.81 inches.
How many inches is 10 cm?
10 cm is about 3.94 inches.
How many inches is 30 cm?
30 cm is about 11.81 inches, or roughly 11 13/16 inches on a tape measure.
What is the cm to inches formula?
Inches = centimeters ÷ 2.54. To go the other way, multiply inches by 2.54 to get centimeters.
Is 1 inch exactly 2.54 cm?
Yes. The inch is defined as exactly 2.54 centimeters, so the conversion is exact.
Is the cm to inches converter free?
Yes, this converter is completely free, needs no sign-up, and gives instant results in your browser.
