Convert Square inches to square centimeters

1 square inch = 6.4516 square centimeters · cm² = in² × 6.4516

in²
Square centimeters
6.4516cm²

1 square inch = 6.4516 square centimeters

When you need this conversion

This conversion goes from square inches, used for small US area measurements, to square centimeters, used for small surface areas and material samples. Both measure the same physical quantity, so the conversion is exact — the difference is which unit your source, tool, or region happens to use.

Square inches to square centimeters conversion table

Conversion table from square inches to square centimeters
Square inches (in²)Square centimeters (cm²)
1 in²6.4516 cm²
2 in²12.9032 cm²
3 in²19.3548 cm²
5 in²32.258 cm²
10 in²64.516 cm²
15 in²96.774 cm²
20 in²129.03 cm²
25 in²161.29 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

The formula

cm² = in² × 6.4516

Because both units measure area, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.

Convert the other way

Square centimeters to square inches →

Related area conversions

All area conversions →

Frequently asked questions

How many square centimeters are in a square inch?
There are 6.4516 square centimeters in 1 square inch. The formula is cm² = in² × 6.4516.
How do you convert square inches to square centimeters?
Use the formula cm² = in² × 6.4516. For example, 10 square inches equals 64.516 square centimeters.
Is the square inches to square centimeters conversion exact?
Yes. Square inches and square centimeters are both units of area, related by an exact defined factor. Displayed results are rounded for readability.
What is in² short for?
in² is the standard symbol for square inch. cm² is the symbol for square centimeter.