Square Inches to Square Centimeters (in² to cm²)
Free online square inch to square centimeter converter. Type a value, get an instant exact result — plus the formula, a ready-made conversion table, and reverse conversion.
AREA CONVERTER — INSTANT RESULT
Formula: multiply the square inch value by 6.4516 — i.e. cm² = in² × 6.4516
Quick check: 1 in² = 6.4516 cm²
Quick check: 1 in² = 6.4516 cm²
Square Inches to Square Centimeters conversion table
| 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 |
| 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 |
| 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 |
How to convert square inches to square centimeters
To convert square inches to square centimeters, multiply the amount in square inches by 6.4516. For example, 10 in² = 64.516 cm². To convert in the other direction, divide by the same factor, or use the ⇄ swap button above.
Convert between metric and imperial/US land area units, including the acre (43,560 ft² exactly) and hectare (10,000 m²) used worldwide for land measurement.
Frequently asked questions
How many square centimeters are in one square inch?
One square inch is exactly 6.4516 square centimeters.
How do I convert in² to cm²?
Multiply the in² value by 6.4516 to get cm². The converter at the top of this page does this automatically and works in both directions.
How much is 100 square inches in square centimeters?
100 square inches equals 645.16 square centimeters.