Centimeters to Inches (cm to in)
1 cm = 0.393701 in
and 1 in = 2.54 cm
How to convert Centimeters to Inches
in = cm ÷ 2.54
To convert, divide the number of centimeters by 2.54. Example: 10 cm ÷ 2.54 = 3.93701 in.
The inch has been defined as exactly 2.54 cm since the 1959 international yard and pound agreement, so 1 cm = 1 ÷ 2.54 in.
You meet this conversion on clothing size charts, screen and luggage dimensions, paper sizes and DIY plans — most tape measures carry both scales.
Mental shortcut: multiply by 0.4 (overestimates by about 1.6%).
Centimeters to Inches conversion chart
| Centimeters | Inches |
|---|---|
| 1 cm | 0.3937 in |
| 2 cm | 0.7874 in |
| 3 cm | 1.18 in |
| 4 cm | 1.57 in |
| 5 cm | 1.97 in |
| 6 cm | 2.36 in |
| 7 cm | 2.76 in |
| 8 cm | 3.15 in |
| 9 cm | 3.54 in |
| 10 cm | 3.94 in |
| 11 cm | 4.33 in |
| 12 cm | 4.72 in |
| 13 cm | 5.12 in |
| 14 cm | 5.51 in |
| 15 cm | 5.91 in |
| 16 cm | 6.3 in |
| 17 cm | 6.69 in |
| 18 cm | 7.09 in |
| 19 cm | 7.48 in |
| 20 cm | 7.87 in |
| 21 cm | 8.27 in |
| 22 cm | 8.66 in |
| 23 cm | 9.06 in |
| 24 cm | 9.45 in |
| 25 cm | 9.84 in |
| 26 cm | 10.24 in |
| 27 cm | 10.63 in |
| Centimeters | Inches |
|---|---|
| 28 cm | 11.02 in |
| 29 cm | 11.42 in |
| 30 cm | 11.81 in |
| 35 cm | 13.78 in |
| 40 cm | 15.75 in |
| 45 cm | 17.72 in |
| 50 cm | 19.69 in |
| 55 cm | 21.65 in |
| 60 cm | 23.62 in |
| 65 cm | 25.59 in |
| 70 cm | 27.56 in |
| 75 cm | 29.53 in |
| 80 cm | 31.5 in |
| 85 cm | 33.46 in |
| 90 cm | 35.43 in |
| 95 cm | 37.4 in |
| 100 cm | 39.37 in |
| 110 cm | 43.31 in |
| 120 cm | 47.24 in |
| 130 cm | 51.18 in |
| 140 cm | 55.12 in |
| 150 cm | 59.06 in |
| 160 cm | 62.99 in |
| 170 cm | 66.93 in |
| 180 cm | 70.87 in |
| 190 cm | 74.8 in |
| 200 cm | 78.74 in |
Values rounded to 2 decimal places (4 below 1). Use the converter above for more precision.
Frequently asked questions
How many inches are in 1 centimeter?
1 centimeter = 0.393701 inches. The inch has been defined as exactly 2.54 cm since the 1959 international yard and pound agreement, so 1 cm = 1 ÷ 2.54 in.
How do I convert centimeters to inches?
Divide the number of centimeters by 2.54. Example: 10 cm ÷ 2.54 = 3.93701 in.
Is there a quick way to estimate cm to in in your head?
Yes — multiply by 0.4. This overestimates by about 1.6%. Use the exact formula (in = cm ÷ 2.54) when precision matters.
How do I convert inches back to centimeters?
Use cm = in × 2.54 — multiply the number of inches by 2.54. See the Inches to Centimeters page for a full chart.