Centimeters to Inches Converter
Formula
To convert centimeters to inches, divide the centimeter value by 2.54. One inch is defined as exactly 2.54 centimeters, making this one of the simplest unit conversions.
How to use
- Enter the Length in Centimeters.
- The inches value updates automatically.
- Read the converted length in inches.
Example
10 cm converts to 3.94 inches (10 ÷ 2.54), since one inch is exactly 2.54 cm.
Frequently Asked Questions
How many inches is 10 cm?
How many inches is 1 cm?
What is the exact conversion factor?
How many inches is 30 cm?
How do I convert inches back to centimeters?
Centimetres to inches
One inch is defined as exactly 2.54 centimetres, so converting centimetres to inches means dividing by 2.54. That exact definition has been the international standard since 1959, which makes the relationship precise — though most converted figures still need rounding: 25 cm is 9.84252 inches.
This is the everyday converter for screen sizes, paper and photo dimensions, fabric, and DIY measurements, where a ruler or spec sheet gives one unit and you need the other.
Handy anchors
Some reference points worth remembering: 2.54 cm = 1 inch, 30.48 cm = 1 foot, and an A4 sheet is 21 cm (8.27 in) wide. A 15-inch laptop screen is about 38 cm on the diagonal. Because the conversion is a single fixed divisor, the same method scales from a 1 cm bead to a 250 cm sofa.