Handy Units
Square Inches to Square Centimetersin² → cm²
1 in² = 6.4516 cm² · 1 cm² = 0.155 in²
Formula
cm² = in² × 6.4516
Example: 15 in² = 15 × 6.4516 = 96.774 cm²
These units differ only by a fixed factor: multiply by it to convert, divide to go back. The factors are exact international definitions (for example 1 inch = 2.54 cm exactly); results are rounded only for display.
Square Inches and Square Centimeters chart
| Square Inches (in²) | Square Centimeters (cm²) |
|---|---|
| 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 |
| 10 in² | 64.516 cm² |
| 15 in² | 96.774 cm² |
| 20 in² | 129.032 cm² |
| 25 in² | 161.29 cm² |
| 50 in² | 322.58 cm² |
| 100 in² | 645.16 cm² |
| 500 in² | 3,225.8 cm² |
| 1,000 in² | 6,451.6 cm² |
| Square Centimeters (cm²) | Square Inches (in²) |
|---|---|
| 1 cm² | 0.155 in² |
| 2 cm² | 0.310001 in² |
| 3 cm² | 0.465001 in² |
| 4 cm² | 0.620001 in² |
| 5 cm² | 0.775002 in² |
| 10 cm² | 1.55 in² |
| 15 cm² | 2.325 in² |
| 20 cm² | 3.10001 in² |
| 25 cm² | 3.87501 in² |
| 50 cm² | 7.75002 in² |
| 100 cm² | 15.5 in² |
| 500 cm² | 77.5002 in² |
| 1,000 cm² | 155 in² |
About these units
Square inch (in²)1 sq in = 6.4516 cm² exactly.
Square centimeter (cm²)1 cm² = 0.0001 m², handy for small objects.
Questions
How many Square Centimeters are in 1 Square Inches?
1 in² = 6.4516 cm².
How many Square Inches are in 1 Square Centimeters?
1 cm² = 0.155 in².