In 1 centimeters there are 0.393701 inches. Meanwhile in 1 inches there are 2.54 centimeters. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Inches to Centimeters calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert centimeters (cm) to inches (in), use this rule:
Example conversions
For a quick estimate, divide by 2.54:
Divide the length in centimeters by 2.54. The result is the length in inches.
Formula: inches = centimeters ÷ 2.54
Because 1 inch equals exactly 2.54 centimeters. This value is a fixed standard, so it won’t change.
Use a simple rule: 1 cm is about 0.39 inches.
For a rough estimate, divide centimeters by 2.5 to get close.
1 cm = 0.3937 inches (rounded to four decimals).
For quick use, many people round it to 0.39 inches.
1 inch = 2.54 centimeters.
This is an exact conversion, not an estimate.
10 cm ÷ 2.54 = 3.937 inches.
Rounded: 10 cm is about 3.94 inches.
30 cm ÷ 2.54 = 11.811 inches.
Rounded: 30 cm is about 11.81 inches.
50 cm ÷ 2.54 = 19.685 inches.
Rounded: 50 cm is about 19.69 inches.
Convert the full height in centimeters to inches by dividing by 2.54. If you want feet and inches, divide the inches by 12.
Example: 170 cm ÷ 2.54 = 66.93 in
Then 66.93 ÷ 12 = 5 feet with 6.93 inches left.
Measure in centimeters, then convert to inches using cm ÷ 2.54. Many size charts use inches for waist, chest, and inseam. Use the converted number, then match it to the chart.
Screens use inches measured across the diagonal. If the diagonal is in centimeters, divide by 2.54 to get inches.
Example: 80 cm ÷ 2.54 = 31.5 inches (about 32 inches).
100 cm ÷ 2.54 = 39.370 inches.
Rounded: 100 cm is about 39.37 inches.
Centimeters are part of the metric system. Inches are part of the US customary system. Both measure length, but they use different unit sizes.
Round based on what you need. For most daily use, two decimal places works well. For building and shop work, you may need more precision, or you may round to the nearest 1/16 inch.
Yes. The base relationship is exact: 1 inch = 2.54 cm. Any small difference comes from rounding the final number.
Multiply inches by 2.54 to get centimeters.
Formula: centimeters = inches × 2.54
Here are a few quick references (rounded):
The Calculate Box tool to convert centimeters to inches uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a centimeters value in the box and have it instantly converted to inches.