CM to Inches Converter
Exact conversion both ways — with the feet-and-inches form heights need.
Type in either field — the other updates instantly.
CM to Inches chart
| Centimeters | Inches | Feet & inches |
|---|---|---|
| 1 cm | 0.39 in | — |
| 2 cm | 0.79 in | — |
| 5 cm | 1.97 in | — |
| 10 cm | 3.94 in | — |
| 15 cm | 5.91 in | — |
| 20 cm | 7.87 in | — |
| 25 cm | 9.84 in | — |
| 30 cm | 11.81 in | — |
| 40 cm | 15.75 in | 1 ft 3.7 in |
| 50 cm | 19.69 in | 1 ft 7.7 in |
| 75 cm | 29.53 in | 2 ft 5.5 in |
| 100 cm | 39.37 in | 3 ft 3.4 in |
| 150 cm | 59.06 in | 4 ft 11.1 in |
| 160 cm | 62.99 in | 5 ft 3 in |
| 170 cm | 66.93 in | 5 ft 6.9 in |
| 180 cm | 70.87 in | 5 ft 10.9 in |
| 190 cm | 74.8 in | 6 ft 2.8 in |
| 200 cm | 78.74 in | 6 ft 6.7 in |
How this is calculated
inches = cm ÷ 2.54 (exact — the inch is defined as 25.4 mm)
Because the definition is exact, so is the conversion: 170 cm = 66.9291 in = 5 ft 6.9 in. Height is the everyday case, which is why the result panel always shows the feet-and-inches split alongside the decimal inches.
The inch has been defined as exactly 25.4 mm since the 1959 international agreement, so this conversion carries no measurement error — only display rounding, and we round at four decimals.
Frequently asked questions
How many inches is 1 cm?
Exactly 0.3937 inches (to four decimals). The inch is defined as exactly 2.54 cm, so cm → inches is always a division by 2.54 — this converter uses that exact definition, not a rounded factor.
What is the formula for cm to inches?
inches = centimeters ÷ 2.54. In the other direction, centimeters = inches × 2.54. Example: 170 cm ÷ 2.54 = 66.93 inches (5 ft 6.9 in).
How do I convert cm to feet and inches for height?
Divide by 2.54 to get total inches, then split by 12: 175 cm = 68.9 in = 5 ft 8.9 in. The converter shows the feet-and-inches form automatically because height is what most people are converting.
Is this converter exact?
Yes — the inch is defined as exactly 25.4 mm, so the conversion has no measurement error, only the rounding you choose to display. We show four decimals and round only at display time.