1 cm to Inches
1 cm is 0.3937 inches.
1 cm = 0.3937 in
Type in either box. Inches also take fractions and feet: 1 1/2, 3/4, 5'7", 5 ft 7 in.
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Inches, as a fraction
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Feet and inches
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Millimetres
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Metres
How to convert 1 cm to inches
Divide by 2.54, the exact number of centimetres in an inch:
1 cm ÷ 2.54 = 0.3937 in
On a tape measure marked in sixteenths, that is about 3/8".
One centimetre is 10 mm, and 0.3937 of an inch — a little over ⅜". Going the other way, an inch is 2.54 cm, so roughly two and a half centimetres make an inch.
1 cm in other units
| Inches | 0.3937 in |
| Inches, as a fraction | about 3/8" |
| Millimetres | 10 mm |
| Metres | 0.01 m |
Centimetres to inches near 1
Need a different value? Type it into the converter above, or go back to the full cm to inches converter.
Frequently asked questions
How many inches is 1 cm?
1 cm is 0.3937 inches. Divide the centimetres by 2.54, the exact length of one inch in centimetres.
How do I estimate 1 cm in inches without a calculator?
Multiply by 4 and divide by 10: 1 × 0.4 = 0.4 in. The exact answer of 0.39 in is 1.6% lower, so knock a little off.