CM to Inches Converter
Convert centimeters to inches (cm to in) with precision. Get decimal inches, fractional ruler inches, feet & inches, step-by-step conversion formulas, and benchmark charts.
Formula: in = cm ÷ 2.54
3 15/16"
0 ft 3.94 in
100.0 mm
0.1000 m
CM to Inches Conversion Chart
Visual measurement chart converting centimeters (cm) directly to inches (in) and common fraction equivalents.
How to Convert Centimeters to Inches
Under the international yard and pound agreement of 1959, one inch is defined as exactly 2.54 centimeters. Therefore, to convert centimeters to inches, you divide by 2.54 (or multiply by approximately 0.393701).
Inches = Centimeters ÷ 2.54
10 cm ÷ 2.54 = 3.9370 inches (approx. 3 15/16 in)
Centimeters to Inches Conversion Table
Comprehensive conversion table covering 1 cm to 100 cm in decimal and fractional ruler inches:
| Centimeters (cm) | Decimal Inches (in) | Fractional Ruler | Feet & Inches |
|---|---|---|---|
| 1 cm | 0.3937 in | 13/33" | 0 ft 0.4 in |
| 2 cm | 0.7874 in | 37/47" | 0 ft 0.8 in |
| 5 cm | 1.9685 in | 1 31/32" | 0 ft 2.0 in |
| 10 cm | 3.9370 in | 3 15/16" | 0 ft 3.9 in |
| 15 cm | 5.9055 in | 5 48/53" | 0 ft 5.9 in |
| 20 cm | 7.8740 in | 7 7/8" | 0 ft 7.9 in |
| 25 cm | 9.8425 in | 9 16/19" | 0 ft 9.8 in |
| 30 cm | 11.8110 in | 11 30/37" | 0 ft 11.8 in |
| 40 cm | 15.7480 in | 15 3/4" | 1 ft 3.7 in |
| 50 cm | 19.6850 in | 19 37/54" | 1 ft 7.7 in |
| 75 cm | 29.5276 in | 29 19/36" | 2 ft 5.5 in |
| 100 cm | 39.3701 in | 39 10/27" | 3 ft 3.4 in |
Frequently Asked Questions
How many inches is 1 centimeter?
1 centimeter equals approximately 0.393701 inches (or about 25/64 of an inch).
What is the shortcut to convert cm to inches in your head?
For a quick mental estimate, multiply the centimeters by 4 and divide by 10 (e.g., 20 cm × 4 = 80 ÷ 10 = 8 inches, very close to the true 7.87 inches).
Is 2.54 cm exactly equal to 1 inch?
Yes, 2.54 cm is an exact international standard definition, not an approximation.
How many centimeters are in a 12-inch standard school ruler?
A standard 12-inch ruler is 30.48 centimeters long (frequently rounded to 30 cm on classroom rulers).
Related Length & Distance Converters
Convert 15 centimeters to inches (5.91 in / 5 29/32 in).
Convert 20 centimeters to inches (7.87 in / 7 7/8 in).
Convert 50 centimeters to inches (19.69 in / 1 ft 7.7 in).
Convert 50 x 70 cm frame and poster sizes to inches (19.69 x 27.56 in).