CM to Inches Converter
Convert cm to inches instantly. Formula: inches = centimeters ÷ 2.54. Free, no ads walls, runs in your browser.
1 Centimeter (cm)
0.3937007874
Inch (in)
Inch (in) = Centimeter (cm) × 0.3937007874
1 Centimeter (cm) equals
Millimeter (mm)
10
Meter (m)
0.01
Kilometer (km)
0.00001
Inch (in)
0.3937007874
Foot (ft)
0.032808399
Yard (yd)
0.010936133
Mile (mi)
0.0000062137
Convert cm to inches instantly with this free online converter — the units are already selected above, so just type your value and read the result. It's most often needed for converting body height, screen sizes, and sewing or furniture measurements between metric and imperial.
The conversion uses the exact formula inches = centimeters ÷ 2.54. Quick reference: 10 cm = 3.94 in, 30 cm = 11.81 in, 100 cm = 39.37 in, 170 cm = 66.93 in. All math runs locally in your browser with 12-digit precision — nothing is sent to a server, and there's no sign-up or paywall.
How to convert units online
- 1Pick a category tab at the top — Length, Weight, Temperature, Volume, Area, Speed, or Data.
- 2Enter the number you want to convert in the Value field.
- 3Choose your starting unit in the From dropdown and your target unit in the To dropdown — the result updates instantly as you type.
- 4Click the swap button between the dropdowns to reverse the conversion direction.
- 5Check the formula shown under the result, and use the quick-reference grid below to see your value’s equivalent in every other unit of the category.
Frequently asked questions
What is the formula to convert cm to inches?
inches = centimeters ÷ 2.54. The converter above applies it instantly as you type and shows the formula used under the result.
What are some common cm to inches conversions?
10 cm = 3.94 in, 30 cm = 11.81 in, 100 cm = 39.37 in, 170 cm = 66.93 in
Can I convert inches back to cm?
Yes — click the swap button between the two unit selectors to reverse the conversion direction instantly.
Is this converter accurate?
Yes. It uses exact international conversion factors and computes to 12 significant digits, entirely in your browser.
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