Square Centimeters to Square Inches Converter
Unit ConversionConvert square centimeters to square inches. 1 square centimeter is about 0.155 square inches, with a conversion table, worked examples and the reverse conversion.
Square Inches
Equivalent area in square inches
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SponsoredThis converter turns square centimeters into square inches (cm2 to in2). Enter a value and the result updates as you type. 1 square centimeter is about 0.155 square inches.
A square centimeter is about 0.155 square inches, since a square inch is 6.4516 square centimeters. Product sizes, sensors and prints given in square centimeters often need to be compared with US listings in square inches, and the same factor works for both directions.
The result is rounded to 4 decimal places, but the factor behind it never is, so long chains of conversions stay accurate. You can type decimals, thousands separators or fractions such as 2 1/2, and the conversion table below lists common values.
How to Convert Square Centimeters to Square Inches
To convert square centimeters to square inches, divide by 6.4516. For example, 100 square centimeters is about 15.5 square inches.
To go from square inches back to square centimeters, multiply by 6.4516. For example, 10 square inches equals exactly 64.516 square centimeters.
Square Centimeters to Square Inches Conversion Table
Common values in square centimeters converted to square inches, rounded to 4 decimal places.
| Square Centimeters | Square Inches |
|---|---|
| 1 cm² | 0.155 in² |
| 5 cm² | 0.775 in² |
| 6.4516 cm² | 1 in² |
| 10 cm² | 1.55 in² |
| 25 cm² | 3.875 in² |
| 50 cm² | 7.75 in² |
| 100 cm² | 15.5 in² |
| 250 cm² | 38.7501 in² |
| 500 cm² | 77.5002 in² |
| 1,000 cm² | 155.0003 in² |
Prints and Screens
A 10 by 15 cm photo is 150 square centimeters, about 23.25 square inches. Multiplying 150 by 0.155 gives 23.25, close enough for most uses. The Pixel to CM Converter relates print size to resolution.
The Centimeters to Inches Converter converts each side first, if you prefer to work in inches from the start.
Frequently Asked Questions
How many square inches is 40 square centimeters?
40 square centimeters is about 6.2 square inches.
How many square inches is 300 square centimeters?
300 square centimeters is about 46.5001 square inches.
How many square inches is a 9 by 13 cm photo?
117 square centimeters is about 18.135 square inches.
Is the square centimeters to square inches factor exact?
The reverse direction is: 1 square inch equals exactly 6.4516 square centimeters, because an inch is exactly 2.54 centimeters, and 2.54 × 2.54 = 6.4516. In this direction the factor has no finite decimal form, so 1 square centimeter is about 0.155 square inches. The calculator divides by the exact value and rounds only the result it shows.
What happens if I enter a negative number?
The result shows a dash. An area is a size, so it is never below zero; a negative value usually means a typing mistake, such as a stray minus sign.
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