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Converters
CM to Inches
One centimetre equals 0.393701 inches. Divide any centimetre length by 2.54 and you have the international inch value used in science, shipping, and product specs.
1 cm = 0.3937 in
How to use it
- Type a value in centimetres. The inches result updates immediately.
- Read the full factor under the result if you need to check the math by hand.
- Use the table for the values people look up most often.
- Open the reverse converter when you already have inches.
Formula
inches = centimetres ÷ 2.54
The international inch has been exactly 25.4 millimetres since 1959. Dividing centimetres by 2.54 is the definition, not a rounded estimate.
Height written for a US form
180 centimetres ÷ 2.54 = 70.866 inches, which is 5 feet 10.9 inches. Many forms want feet and inches separately: 70.866 ÷ 12 is 5 feet with a remainder of 10.866 inches.
People convert centimetres to inches for screen sizes, height, furniture, fabric, and parcel dimensions. A 180 cm person is 70.866 inches tall. A 91.44 cm length is exactly 3 feet, because the foot is exactly 30.48 centimetres. The converter above multiplies by the full factor and rounds only the displayed digits, so a workshop measurement and a school worksheet stay in agreement.
Common cm to inches values
| centimetres | inches |
|---|---|
| 1 cm | 0.3937 in |
| 2.54 cm | 1 in |
| 10 cm | 3.937 in |
| 30 cm | 11.811 in |
| 91.44 cm | 36 in |
| 180 cm | 70.8661 in |
Questions
How do I convert centimetres to inches?
Use inches = centimetres ÷ 2.54. The converter applies that factor at full precision and rounds only what it displays.
Is this cm to inches factor exact?
The international inch has been exactly 25.4 millimetres since 1959. Dividing centimetres by 2.54 is the definition, not a rounded estimate.
How many inches is 180 cm?
180 centimetres is 70.866 inches, or about 5 feet 11 inches. The exact value is 180 ÷ 2.54.
Does ProHacks store the number I type?
No. The conversion runs in your browser. The value is not uploaded with the calculation.