CM to Inches Conversion — Chart, Formula & Calculator
Convert centimeters to inches with the exact formula, a quick reference chart, and worked examples. 1 cm = 0.3937 inches. Covers height, screens, and crafts.
Centimeters to inches is one of the most frequently searched conversions, driven by height comparisons, screen sizes, clothing measurements, and craft projects. The CalcHub Length Converter handles it instantly, but the math is straightforward.
The Formula
Inches = Centimeters x 0.3937Or equivalently: Inches = Centimeters / 2.54
The number 2.54 is exact — one inch is defined as exactly 2.54 centimeters.
Worked Example 1 — Height
You are 175 cm tall. What is that in feet and inches?
175 / 2.54 = 68.9 inches. Divide by 12 to get feet: 68.9 / 12 = 5 feet 8.9 inches, or roughly 5 feet 9 inches.
Worked Example 2 — Phone Screen
A phone has a 16.5 cm display. In inches: 16.5 / 2.54 = 6.5 inches — a standard large phone size.
CM to Inches Conversion Chart
| CM | Inches | CM | Inches |
|---|---|---|---|
| 1 | 0.39 | 60 | 23.62 |
| 2 | 0.79 | 70 | 27.56 |
| 5 | 1.97 | 80 | 31.50 |
| 10 | 3.94 | 90 | 35.43 |
| 15 | 5.91 | 100 | 39.37 |
| 20 | 7.87 | 120 | 47.24 |
| 25 | 9.84 | 150 | 59.06 |
| 30 | 11.81 | 160 | 62.99 |
| 40 | 15.75 | 170 | 66.93 |
| 50 | 19.69 | 180 | 70.87 |
Height Conversion Quick Reference
| CM | Feet & Inches |
|---|---|
| 150 | 4'11" |
| 155 | 5'1" |
| 160 | 5'3" |
| 165 | 5'5" |
| 170 | 5'7" |
| 175 | 5'9" |
| 180 | 5'11" |
| 185 | 6'1" |
| 190 | 6'3" |
| 195 | 6'5" |
Practical Use Cases
Online shopping: International clothing sites list measurements in centimeters. A 76 cm waist = 30 inches. A 96 cm chest = 37.8 inches. Home improvement: Furniture from IKEA comes with metric dimensions. A 120 cm shelf = 47.2 inches, which tells you instantly whether it fits a 48-inch space. Art and framing: Photo prints and frames are sold in inches in the US (5x7, 8x10) but in centimeters elsewhere. Knowing 20x25 cm is roughly 8x10 inches saves returns.What is the quick mental math for cm to inches?
Divide by 2.5 for a rough estimate. It will be about 1.6% too high, which is close enough for most purposes. Example: 30 cm / 2.5 = 12 inches (exact: 11.81).
Why is 1 inch exactly 2.54 cm?
In 1959, the US, UK, and other English-speaking countries agreed to define the inch as exactly 25.4 millimeters. This made the conversion factor exact rather than approximate.
How do I convert inches back to centimeters?
Multiply inches by 2.54. For example, 12 inches x 2.54 = 30.48 cm.
Related Calculators
- Screen Size Calculator — diagonal measurements
- Height Calculator — predict adult height
- Square Footage Calculator — area from dimensions
- DPI/PPI Calculator — pixels per inch for prints