How to convert centimeters to inches
One inch is exactly 2.54 centimeters — that has been the official definition since 1959, so the answer is exact, not a rounded guess. To turn centimeters into inches, divide by 2.54 (or multiply by 0.3937).
Formula: inches = cm ÷ 2.54
Example: 30 cm ÷ 2.54 = 11.81 inches
cm to in table
| Centimeters (cm) | Inches (in) |
|---|---|
| 1 | 0.39 |
| 2 | 0.79 |
| 3 | 1.18 |
| 5 | 1.97 |
| 10 | 3.94 |
| 15 | 5.91 |
| 20 | 7.87 |
| 25 | 9.84 |
| 30 | 11.81 |
| 40 | 15.75 |
| 50 | 19.69 |
| 60 | 23.62 |
| 70 | 27.56 |
| 80 | 31.5 |
| 90 | 35.43 |
| 100 | 39.37 |
| 120 | 47.24 |
| 150 | 59.06 |
| 160 | 62.99 |
| 170 | 66.93 |
| 180 | 70.87 |
| 200 | 78.74 |
Values are rounded to 2 decimal places.
Everyday sizes in inches
- A phone screen of 15.5 cm (corner to corner) is about 6.1 inches
- A ruler of 30 cm is 11.8 inches — just under one foot (12 inches)
- A height of 170 cm is 66.9 inches, which is 5 ft 6.9 in
- A TV of 140 cm across the diagonal is a 55-inch TV
How to use it
- Type a number in the From box — the answer appears straight away
- Click Swap (⇄) to convert the other way, from inches to centimeters
- Change the units or the category to convert anything else — length, weight, temperature, volume, speed and more
Frequently asked questions
How many inches is 1 cm?
1 centimeter is 0.3937 inches. It takes about 2.54 centimeters to make one inch.
How do I convert cm to inches in my head?
Divide by 2.5 for a quick estimate: 50 cm ÷ 2.5 = 20, and the exact answer is 19.69 inches. For a closer answer, multiply by 0.4 and take a little off.
How do I convert my height from cm to feet and inches?
Divide the centimeters by 2.54 to get inches, then divide by 12: the whole number is feet and the rest is inches. 175 cm = 68.9 inches = 5 ft 8.9 in.
Is my data sent anywhere?
No. The conversion runs in your browser, on your own device.
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