How to convert square inches to square centimeters
cm² = in² × 6.4516Multiply the value in square inches by 6.4516. To go the other way, multiply by 0.15500031 (or divide by 6.4516).
A square inch is larger than a square centimeter: one square inch contains 6.4516 square centimeters.
Worked examples
- 1 square inch1 in² × 6.4516 = 6.4516 cm²
- 5 square inches5 in² × 6.4516 = 32.258 cm²
- 10 square inches10 in² × 6.4516 = 64.516 cm²
- 20 square inches20 in² × 6.4516 = 129.032 cm²
- 100 square inches100 in² × 6.4516 = 645.16 cm²
Square inches to square centimeters conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Square inches (in²) | Square centimeters (cm²) |
|---|---|
| 0.1 in² | 0.64516 cm² |
| 0.25 in² | 1.6129 cm² |
| 0.5 in² | 3.2258 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 |
| 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 |
| Square inches (in²) | Square centimeters (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 |
About the units
Square inch (in²)
The square inch (in²) is a unit of area in the US customary system. One square inch equals 0.00064516 square meters (m²).
Square centimeter (cm²)
The square centimeter (cm²) is a unit of area in the International System of Units (SI). One square centimeter equals 0.0001 square meters (m²).
Frequently asked questions
How many square centimeters are in one square inch?
There are 6.4516 square centimeters in one square inch, and this value is exact by definition.
How do I convert square inches to square centimeters?
Multiply the number of square inches by 6.4516. For example, 10 in² × 6.4516 = 64.516 cm².
How many square inches are in one square centimeter?
One square centimeter equals 0.15500031 square inches. That is the reverse factor, 1 ÷ 6.4516.
What is 10 square inches in square centimeters?
10 in² = 64.516 cm².
Is this in² to cm² converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.