Convert Square Inches to Square Centimeters
1 in² = 6.4516 cm². Enter any value below.
Converted to every unit
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Square Inches to Square Centimeters formula
cm² = in² × 6.4516
A square inch is exactly 6.4516 square centimeters. A square centimeter is the area of a 1 cm × 1 cm square.
Worked example
To convert 5 in², multiply by 6.4516: 5 in² × 6.4516 = 32.258 cm².
Square Inches to Square Centimeters conversion table
| Square Inches | Square Centimeters |
|---|---|
| 1 in² | 6.4516 cm² |
| 2 in² | 12.9032 cm² |
| 3 in² | 19.3548 cm² |
| 4 in² | 25.8064 cm² |
| 5 in² | 32.258 cm² |
| 6 in² | 38.7096 cm² |
| 7 in² | 45.1612 cm² |
| 8 in² | 51.6128 cm² |
| 9 in² | 58.0644 cm² |
| 10 in² | 64.516 cm² |
| 12 in² | 77.4192 cm² |
| 15 in² | 96.774 cm² |
| 20 in² | 129.032 cm² |
| 25 in² | 161.29 cm² |
| 30 in² | 193.548 cm² |
| 40 in² | 258.064 cm² |
| 50 in² | 322.58 cm² |
| 75 in² | 483.87 cm² |
| 100 in² | 645.16 cm² |
| 250 in² | 1,612.9 cm² |
| 500 in² | 3,225.8 cm² |
| 1,000 in² | 6,451.6 cm² |
Frequently asked questions
How many square centimeters are in a square inch?
1 in² equals 6.4516 cm².
How do I convert square inches to square centimeters?
Use the formula cm² = in² × 6.4516. For example, 5 in² = 32.258 cm².
Last reviewed: October 2026 · Uses exact, internationally defined conversion factors.