Centimeters to Inches Converter (cm to in)
1 inch = 2.54 cm exactly. Convert centimeters to inches or inches to centimeters, see heights in feet and inches, and use the cm and inch charts.
in = cm ÷ 2.54
Centimeter (cm): The centimetre is one hundredth of a metre (0.01 m). It is used for everyday measurements such as body height, clothing and paper sizes, and one inch is exactly 2.54 cm.
Inch (in): The inch is exactly 2.54 centimetres, a value fixed by the 1959 international yard and pound agreement. It is used in the US and UK for screen sizes, tools, pipes and body measurements.
| Centimeter (cm) | Inch (in) |
|---|---|
| 1 | 0.393700787402 |
| 5 | 1.96850393701 |
| 10 | 3.93700787402 |
| 25 | 9.84251968504 |
| 50 | 19.6850393701 |
| 100 | 39.3700787402 |
The inch has been defined as exactly 2.54 centimeters since 1959, so this conversion has no rounding in its definition: divide centimeters by 2.54 for inches, or multiply inches by 2.54 for centimeters.
The centimeter chart also shows feet and inches, the way heights are usually written in the US and UK. Screen sizes, waist and inseam measurements and paper sizes are other common uses.
How to use this tool
- Type a value in the Centimeter box to see it in inches, or type in the Inch box to convert the other way.
- Press ⇄ to swap the two units, or Load example for a typical value.
- Check the charts below for common values; for other units, open the Length converter.
Formula
in = cm ÷ 2.54
cm = in × 2.54
Both factors come from exact definitions: 1 inch = 2.54 centimeters and 1 centimeter = 0.393700787402 inches (shown to 12 significant digits).
Example
Two conversions worked with the same factors the converter uses:
175 cm × 0.393700787402 ≈ 68.8976 in
12 in × 2.54 = 30.48 cm
Centimeter to Inch chart
Common values from centimeters to inches, rounded to four decimal places.
| Centimeter (cm) | Inch (in) | Feet and inches |
|---|---|---|
| 1 | 0.3937 | 0 ft 0.4 in |
| 2 | 0.7874 | 0 ft 0.8 in |
| 3 | 1.1811 | 0 ft 1.2 in |
| 5 | 1.9685 | 0 ft 2.0 in |
| 10 | 3.937 | 0 ft 3.9 in |
| 15 | 5.9055 | 0 ft 5.9 in |
| 20 | 7.874 | 0 ft 7.9 in |
| 25 | 9.8425 | 0 ft 9.8 in |
| 30 | 11.811 | 0 ft 11.8 in |
| 40 | 15.748 | 1 ft 3.7 in |
| 50 | 19.685 | 1 ft 7.7 in |
| 60 | 23.622 | 1 ft 11.6 in |
| 70 | 27.5591 | 2 ft 3.6 in |
| 80 | 31.4961 | 2 ft 7.5 in |
| 90 | 35.4331 | 2 ft 11.4 in |
| 100 | 39.3701 | 3 ft 3.4 in |
| 120 | 47.2441 | 3 ft 11.2 in |
| 150 | 59.0551 | 4 ft 11.1 in |
| 155 | 61.0236 | 5 ft 1.0 in |
| 160 | 62.9921 | 5 ft 3.0 in |
| 165 | 64.9606 | 5 ft 5.0 in |
| 170 | 66.9291 | 5 ft 6.9 in |
| 175 | 68.8976 | 5 ft 8.9 in |
| 180 | 70.8661 | 5 ft 10.9 in |
| 185 | 72.8346 | 6 ft 0.8 in |
| 190 | 74.8031 | 6 ft 2.8 in |
| 200 | 78.7402 | 6 ft 6.7 in |
Inch to Centimeter chart
The reverse direction for values people often look up.
| Inch (in) | Centimeter (cm) |
|---|---|
| 0.25 | 0.635 |
| 0.5 | 1.27 |
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 5 | 12.7 |
| 6 | 15.24 |
| 8 | 20.32 |
| 10 | 25.4 |
| 12 | 30.48 |
| 15 | 38.1 |
| 18 | 45.72 |
| 20 | 50.8 |
| 24 | 60.96 |
| 30 | 76.2 |
| 36 | 91.44 |
| 48 | 121.92 |
| 60 | 152.4 |
| 72 | 182.88 |
Quick mental estimate
Multiply the centimeters by 4 and divide by 10: 50 cm → 20 in. The shortcut uses 0.4 in place of 0.3937, so it reads about 1.6% high.
Use the converter or the charts when the exact figure matters.
The two units
Centimeter (cm): The centimetre is one hundredth of a metre (0.01 m). It is used for everyday measurements such as body height, clothing and paper sizes, and one inch is exactly 2.54 cm.
Inch (in): The inch is exactly 2.54 centimetres, a value fixed by the 1959 international yard and pound agreement. It is used in the US and UK for screen sizes, tools, pipes and body measurements.
Frequently asked questions
How many centimeters are in an inch?
Exactly 2.54 cm. A foot (12 inches) is therefore exactly 30.48 cm, and a yard (36 inches) is 91.44 cm.
How do I convert my height from cm to feet and inches?
Divide the centimeters by 2.54 to get inches, then divide by 12: the whole number is feet and the remainder is inches. The chart on this page shows common heights already split into feet and inches.
Is there a different inch for land surveys?
The US survey foot (1200/3937 m) differed from the international foot by about 2 parts per million. NIST retired it for new work from January 1, 2023. This converter uses the international inch of 2.54 cm.
How precise is the result?
The converter uses the exact definitions above with browser floating-point arithmetic and shows up to 12 significant digits. The charts round to four decimal places for reading.
Sources
Last updated:
Page address with these inputs: https://kakao.mobile/tools/centimeter-to-inch-converter/
Cite or embed this tool
kakaoCalc. (2026, November 2). Centimeters to Inches Converter (cm to in). https://kakao.mobile/tools/centimeter-to-inch-converter/
“Centimeters to Inches Converter (cm to in).” kakaoCalc, 2 Nov. 2026, kakao.mobile/tools/centimeter-to-inch-converter/.
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