CM to Inches Converter
Convert centimeters to inches instantly — inches = centimeters ÷ 2.54
1 cm = 0.39 in(inches = centimeters ÷ 2.54)
Centimeters to Inches conversion table
| Centimeters (cm) | Inches (in) |
|---|---|
| 1 | 0.39 |
| 2 | 0.79 |
| 5 | 1.97 |
| 10 | 3.94 |
| 15 | 5.91 |
| 20 | 7.87 |
| 25 | 9.84 |
| 30 | 11.81 |
| 50 | 19.69 |
| 100 | 39.37 |
| 150 | 59.06 |
| 160 | 62.99 |
| 170 | 66.93 |
| 180 | 70.87 |
| 200 | 78.74 |
How it works
Enter a value in centimeters and it is converted to inches using the exact factor: inches = centimeters ÷ 2.54. The conversion also works in reverse — edit either field.
CM to Inches formula
inches = centimeters ÷ 2.54
- cm
- centimeters
- in
- inches
Worked example
- Convert 170 cm to inches
- inches = centimeters ÷ 2.54
170 ÷ 2.54 ≈ 66.93 inches (about 5 ft 7 in)
Good to know
- The conversion factor is exact by definition (international yard and pound agreement, 1959) — rounding only comes from the decimals you keep.
- For the reverse conversion, see the Inches to CM converter below.
Related Calculators
Frequently Asked Questions
How do I convert cm to inches?
Divide the number of centimeters by 2.54. One inch is defined as exactly 2.54 centimeters, so 100 cm ÷ 2.54 ≈ 39.37 inches. To go the other way, multiply inches by 2.54.
How many inches is 1 cm?
1 cm equals about 0.3937 inches — a little under half an inch. The relationship is exact: 1 inch = 2.54 cm by definition.
What is 170 cm in feet and inches?
170 cm is about 66.93 inches. Divide by 12 for feet: 5 feet 6.9 inches, commonly rounded to 5'7".
Is the cm-to-inch factor exact or approximate?
Exact. Since the 1959 international yard agreement, the inch is defined as exactly 2.54 cm, so conversions are precise — any rounding comes only from the decimals you choose to keep.