Square Inches to cm²
A square inch is 6.4516 cm², the square of 2.54. It is the denominator in psi (pounds per square inch) and appears in print and film formats.
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Common values
Formula
㎠ = sq in × 6.4516
Lengths scale by 2.54 but areas scale by 6.45. Using the length ratio on an area is off by a factor of two and a half.
Frequently asked questions
Q. How many ㎠ is 1 sq in?
1 sq in is 6.452 ㎠, and 10 sq in is 64.516 ㎠. Type any value in the box above to convert instantly.
Q. And how many sq in is 1 ㎠?
1 ㎠ is 0.155 sq in. This converter works both ways, so typing in the right box updates the left one.
Q. Where is this unit used?
Lengths scale by 2.54 but areas scale by 6.45. Using the length ratio on an area is off by a factor of two and a half.
Other converters
Traditional units (geun, doe, majigi and so on) vary by region and product.