cm² to in² Conversion Calculator
Click on the following link if you want to convert square inches to square centimeters – in² to cm²
History
The centimeter (cm) is part of the metric system, introduced in France in the 1790s to unify and simplify measurements.
One centimeter equals one-hundredth of a meter, and squaring it gives the square centimeter (cm²).
The inch (in), however, comes from the older Imperial system and was standardized in 1959 as exactly 2.54 centimeters.
Therefore, when converting areas:
1 cm² = (1 ÷ 2.54)² = 0.1550 in².
Common Usage
- Square centimeters (cm²) are common in engineering, medicine, and product design.
- Square inches (in²) are used in the U.S. and U.K. for construction, printing, and consumer goods.
For example, a tablet display area of 250 cm² equals about 38.75 in².
Conversion Formula
The conversion formula is:
in² = cm² ÷ 6.4516
Example:
Convert 100 cm² to square inches.
100 ÷ 6.4516 = 15.50 in²
So, 100 square centimeters equal 15.5 square inches.
Conversion Table
| Square Centimeters (cm²) | Square Inches (in²) |
|---|---|
| 10 cm² | 1.55 in² |
| 25 cm² | 3.88 in² |
| 50 cm² | 7.75 in² |
| 100 cm² | 15.50 in² |
| 200 cm² | 31.00 in² |
| 300 cm² | 46.51 in² |
| 400 cm² | 62.01 in² |
| 500 cm² | 77.52 in² |
| 1,000 cm² | 155.03 in² |
| 2,000 cm² | 310.06 in² |
Interesting Facts
- 1 square inch equals the area of a square roughly the size of a postage stamp.
- Engineers often convert cm² to in² when working with international design standards.
- The inch is still used in screen specifications worldwide, even when countries use the metric system.
Frequently Asked Questions
1. How many square inches are in a square centimeter?
0.1550 in².
2. How do I convert cm² to in²?
Divide by 6.4516.
3. Is an inch longer or shorter than a centimeter?
An inch is longer (2.54 cm).
4. Where is cm² to in² conversion useful?
In design, architecture, and technology where both metric and imperial units are used.
5. Why does the conversion use squared values?
Because you’re converting area, not linear length.
