Convert square centimeters to square millimeters
1 cm² = 100 mm² — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
100mm²
1 cm² = 100 mm²
How to convert square centimeters to square millimeters
Multiply the number of square centimeters by 100 to get square millimeters.
The exact factor is 100 .
Square centimeter to Square millimeter conversion table
| Square centimeters (cm²) | Square millimeters (mm²) |
|---|---|
| 1 cm² | 100 |
| 2 cm² | 200 |
| 3 cm² | 300 |
| 5 cm² | 500 |
| 10 cm² | 1000 |
| 20 cm² | 2000 |
| 25 cm² | 2500 |
| 50 cm² | 5000 |
| 100 cm² | 10 000 |
| 250 cm² | 25 000 |
| 500 cm² | 50 000 |
| 1000 cm² | 100 000 |
Square millimeter to Square centimeter conversion table
| Square millimeters (mm²) | Square centimeters (cm²) |
|---|---|
| 1 mm² | 0.01 |
| 2 mm² | 0.02 |
| 3 mm² | 0.03 |
| 5 mm² | 0.05 |
| 10 mm² | 0.1 |
| 20 mm² | 0.2 |
| 25 mm² | 0.25 |
| 50 mm² | 0.5 |
| 100 mm² | 1 |
| 250 mm² | 2.5 |
| 500 mm² | 5 |
| 1000 mm² | 10 |
Frequently asked
How many square millimeters are in a square centimeter?
One square centimeter equals 100 square millimeters (cm² → mm²). That figure is exact, not rounded.
How do you convert square centimeters to square millimeters?
Multiply the number of square centimeters by 100 to get square millimeters.
What is 1 mm² in square centimeters?
One square millimeter is 0.01 square centimeters.
What is 10 cm² in mm²?
10 cm² = 1000 mm².