cm to inches converter
Type any centimeter value and get inches instantly - divide by 2.54, every time
12 centimeters =4.72 inches
12 cm ÷ 2.54 = 4.72 in
Common cm to inches conversions
| cm | inches | cm | inches |
|---|---|---|---|
| 1 cm | 0.39 in | 30 cm | 11.81 in |
| 2 cm | 0.79 in | 40 cm | 15.75 in |
| 5 cm | 1.97 in | 50 cm | 19.69 in |
| 10 cm | 3.94 in | 60 cm | 23.62 in |
| 12 cm | 4.72 in | 80 cm | 31.50 in |
| 15 cm | 5.91 in | 100 cm | 39.37 in |
| 20 cm | 7.87 in | 200 cm | 78.74 in |
Looking for the reverse? Use the inches to cm converter, or see the full1-100 cm conversion table.
The formula
inches = centimeters ÷ 2.54. The inch is defined as exactly 2.54 centimeters, so the division is the exact inverse - results only drift when you round them. As a decimal, 1 cm = 0.393701 in, which is why the “4 tenths per centimeter” estimate works in a pinch.
To go the other way, multiply by 2.54: 12 in × 2.54 = 30.48 cm. Theinches to cm converter does that direction.
FAQ
How do I convert cm to inches?
Divide the centimeter value by 2.54. One inch is exactly 2.54 cm, so 12 cm / 2.54 = 4.72 in and 30 cm / 2.54 = 11.81 in. To convert the other way, multiply inches by 2.54.
What is 12 cm in inches?
12 cm equals 4.72 inches (12 / 2.54 = 4.7244, rounded). A standard 12 cm ruler is just under 5 inches long.
What is 30 cm in inches?
30 cm equals 11.81 inches, because 30 / 2.54 = 11.811. A 30 cm ruler is slightly shorter than a 12-inch ruler, which measures 30.48 cm.
How many inches is 1 cm?
One centimeter equals 0.3937 inches - just over 3/8 of an inch. For quick estimates, use 0.4 in per cm and round down slightly.
Convert while you measure
Measuring something on screen? The online ruler draws cm, mm, and inch scales on the same edge, calibrated to your display - both numbers, no conversion step. On paper, use theprintable 12-inch and 30-cm rulers.