Square Inches to Square Centimeters

1 square inch = 6.4516 square centimeters. To convert square inches (in²) to square centimeters (cm²), multiply by 6.4516.

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How to convert square inches to square centimeters

cm² = in² × 6.4516

Example: convert 8 square inches to square centimeters.
8 in² × 6.4516 = 51.6128 cm²

The same relationship in reverse: 1 square centimeter = 0.15500031 square inches, so you can also divide by 0.15500031. Need the other direction? Use the square centimeters to square inches converter.

You will typically need this conversion for labels, screens and small material samples.

Square Inches to Square Centimeters conversion chart

Square Inches (in²)Square Centimeters (cm²)
1 in²6.4516 cm²
2 in²12.9032 cm²
3 in²19.3548 cm²
4 in²25.8064 cm²
5 in²32.258 cm²
6 in²38.7096 cm²
7 in²45.1612 cm²
8 in²51.6128 cm²
9 in²58.0644 cm²
10 in²64.516 cm²
15 in²96.774 cm²
20 in²129.032 cm²
25 in²161.29 cm²
30 in²193.548 cm²
40 in²258.064 cm²
50 in²322.58 cm²
75 in²483.87 cm²
100 in²645.16 cm²
250 in²1,612.9 cm²
500 in²3,225.8 cm²
1,000 in²6,451.6 cm²

Values rounded to 8 significant figures. The converter above shows up to 12.

About the units

Square Inch (in²)

The area of a square 1 inch on each side, exactly 6.4516 cm². Used for screen areas and pressure (psi).

Square Centimeter (cm²)

The area of a square 1 cm on each side. Used for small surfaces such as skin patches or labels.

Frequently asked questions

How many square centimeters are in a square inch?

1 square inch = 6.4516 square centimeters. Going the other way, 1 square centimeter = 0.15500031 square inches.

How do I convert square inches to square centimeters?

To convert square inches to square centimeters, multiply by 6.4516. The formula is cm² = in² × 6.4516.

What is 8 in² in cm²?

8 square inches is 51.6128 square centimeters (8 in² × 6.4516 = 51.6128 cm²).

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