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Convert Square Inches to Square Centimeters

Convert square inches to square centimeters instantly (Square Inches to Square Centimeters). 1 in² = 6.4516 cm².

Converter

square inch (in²)
square centimeter (cm²)

in² to cm² conversion table

Square inchesSquare centimeters
1 in²6.4516 cm²
2 in²12.9032 cm²
5 in²32.258 cm²
10 in²64.516 cm²
25 in²161.29 cm²
50 in²322.58 cm²
100 in²645.16 cm²
1000 in²6451.6 cm²

Formula

cm² = in² × 6.4516

Worked example

25 in² × 6.4516 = 161.29 cm²

Popular in² to cm² conversions

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

About square inches and square centimeters

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.

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.

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

Notes

in² to cm² FAQs

How do I convert square inches to square centimeters?

Multiply the number of square inches by 6.4516 to get square centimeters. For example, 25 in² × 6.4516 = 161.29 cm².

How many square centimeters are in one square inch?

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

How many square centimeters are in 10 square inches?

10 in² = 64.516 cm², rounded to 6 significant digits. Change the value in the converter above for any other amount.

Is the in² to cm² conversion exact?

Yes. The factor 6.4516 follows directly from the unit definitions (A square inch is exactly 6.4516 square centimeters; a square centimeter is the area of a square 1 cm on each side), so the only rounding is in the digits you choose to display.

What is the difference between square inches and square centimeters?

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

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

Area scales with the square of length. 1 in = 2.54 cm, so 1 in² = 2.54² cm² = 6.4516 cm².

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