1 square inch = 6.4516 square centimeters
Convert square inches to square centimeters.
Both directions on one page — swap the units and the whole thing runs backwards.
Type a value, or “5cm to in”
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The formula
cm² = in² × 6.4516
Worked through with a real value: 10 square inches = 64.516 square centimeters.
Going the other way: in² = cm² × 0.155, so 1 square centimeter = 0.155 square inches.
What each unit is
- square inch in²
- A square inch on each side, used for small areas, engineering drawings and component specifications.
- square centimeter cm²
- A square ten millimetres on each side, used for small areas and architectural drawings.
Where these come from
- 1 square inch = 0.00064516 square meters
- 1 square centimeter = 0.0001 square meters
Every other number on this page is computed from those, and each category is pinned to conversions worked out by hand from the units' primary definitions before it ships.
Conversion tables
| square inches (in²) | square centimeters (cm²) |
|---|---|
| 1 | 6.4516 |
| 2 | 12.9032 |
| 3 | 19.3548 |
| 4 | 25.8064 |
| 5 | 32.258 |
| 6 | 38.7096 |
| 7 | 45.1612 |
| 8 | 51.6128 |
| 9 | 58.0644 |
| 10 | 64.516 |
| 20 | 129.032 |
| 25 | 161.29 |
| 50 | 322.58 |
| 75 | 483.87 |
| 100 | 645.16 |
| square centimeters (cm²) | square inches (in²) |
|---|---|
| 1 | 0.155 |
| 2 | 0.310001 |
| 3 | 0.465001 |
| 4 | 0.620001 |
| 5 | 0.775002 |
| 6 | 0.930002 |
| 7 | 1.085 |
| 8 | 1.24 |
| 9 | 1.395 |
| 10 | 1.55 |
| 20 | 3.10001 |
| 25 | 3.87501 |
| 50 | 7.75002 |
| 75 | 11.625 |
| 100 | 15.5 |
Questions
How many square centimeters are in a square inch?
1 square inch = 6.4516 square centimeters.
How do I convert square inches to square centimeters?
Use cm² = in² × 6.4516. For example, 10 square inches = 64.516 square centimeters.
How many square inches are in one square centimeter?
1 square centimeter = 0.155 square inches.
What is 10 square inches in square centimeters?
10 square inches = 64.516 square centimeters.
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