How to convert Centimeters to inches
inches = centimeters ÷ 2.54
Divide centimeters by 2.54. Do not round the factor to 2.5 for a precise conversion: that shortcut changes the result. Round the final number to the detail your task requires.
Worked examples
30 cm ≈ 11.81102362 in
30 ÷ 2.54 ≈ 11.81102362
A 30-centimeter ruler is about 11.81102 inches long, slightly shorter than a 12-inch ruler.
2.54 cm ≈ 1 in
2.54 ÷ 2.54 ≈ 1
Exactly 2.54 centimeters makes one international inch.
Frequently asked questions
Is one centimeter half an inch?
No. One centimeter is approximately 0.3937007874 inches. Half an inch is 1.27 centimeters.
Can I read the decimal as a ruler fraction?
A decimal inch must be converted to the fraction marked on your ruler. For example, 0.5 inch is 1/2 inch and 0.25 inch is 1/4 inch. The converter displays decimals rather than automatically rounding to ruler marks.