Practical measurement guide
How to Convert CM to Inches
Convert centimeters to inches with the exact formula, examples, rounding guidance, and related conversion tools.
Divide centimeters by 2.54 to convert centimeters to inches.
in
Decimals and fractions work, for example 1.5, 1/2, or 1 1/2.
cm
Fractions
25.4 in = 64.516 cm
25.4 in × 2.54 = 64.516 cm
Decimal inches25.4 in
Feet + inches2 ft 1.4 in
Nearest 1/16 inch25 3/8"
Use the exact cm-to-inches formula
To convert centimeters to inches, divide the centimeter value by 2.54. For example, 25.4 cm ÷ 2.54 = 10 inches.
When rounding matters
Centimeter values often convert to long decimal inch results. Use decimal inches for product specifications, and use fractional inches only when the task is tape-measure work or a rough physical estimate.
Related measurement tools
Frequently asked questions
What is the formula for cm to inches?
Divide centimeters by 2.54.
How many inches is 25.4 cm?
25.4 cm equals exactly 10 inches.