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Convert Square Centimeters to Square Inches

Convert square centimeters to square inches instantly (Square Centimeters to Square Inches). 1 cm² = 0.15500031 in².

Converter

square centimeter (cm²)
square inch (in²)

cm² to in² conversion table

Square centimetersSquare inches
1 cm²0.15500031 in²
2 cm²0.31000062 in²
5 cm²0.77500155 in²
10 cm²1.5500031 in²
25 cm²3.8750078 in²
50 cm²7.7500155 in²
100 cm²15.500031 in²
1000 cm²155.00031 in²

Formula

in² = cm² × 0.15500031

Worked example

25 cm² × 0.15500031 = 3.87500775 in²

Popular cm² to in² conversions

Quick answers for common values, each with its own formula and worked steps.

About square centimeters and square inches

Square centimeter (cm²)

A square centimeter is the area of a square 1 cm on each side. It is used for small surfaces, product dimensions and medical measurements.

Square inch (in²)

A square inch is exactly 6.4516 square centimeters. It is used for small areas and for pressure ratings in pounds per square inch.

Both are units of area; the base unit used internally is m².

Notes

cm² to in² FAQs

How do I convert square centimeters to square inches?

Multiply the number of square centimeters by 0.15500031 to get square inches. For example, 25 cm² × 0.15500031 = 3.87501 in².

How many square inches are in one square centimeter?

1 cm² = 0.15500031 in² and 1 in² = 6.4516 cm². To go the other way, use the square inches to square centimeters converter.

How many square inches are in 10 square centimeters?

10 cm² = 1.55 in², rounded to 6 significant digits. Change the value in the converter above for any other amount.

Is the cm² to in² conversion exact?

The ratio is exact by definition, but its decimal form does not end (0.155000310001… to 12 significant digits). The converter keeps full precision internally and rounds only the displayed answer, which you can set from 4 to 12 significant digits.

What is the difference between square centimeters and square inches?

A square centimeter is the area of a square 1 cm on each side. It is used for small surfaces, product dimensions and medical measurements. A square inch is exactly 6.4516 square centimeters. It is used for small areas and for pressure ratings in pounds per square inch.

Why isn't the cm² to in² factor the same as cm to in?

Area scales with the square of length. 1 cm = 0.3937007874 in, so 1 cm² = 0.3937007874² in² = 0.15500031 in².

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