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
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1 cm² = 100 mm²
Show this value in all 25 area units
- Square kilometers km² 1e-10
- Square hectometers hm² 1e-8
- Square decameters dam² 0.000 001
- Square meters m² 0.0001
- Square decimeters dm² 0.01
- Square centimeters cm² 1
- Square millimeters mm² 100
- Square micrometers µm² 100 000 000
- Square nanometers nm² 100 000 000 000 000
- Hectares ha 1e-8
- Ares a 0.000 001
- Decares daa 0.000 000 1
- Square inches in² 0.155 000 310 001
- Square feet ft² 0.001 076 391 041 67
- Square yards yd² 0.000 119 599 004 63
- Square miles mi² 3.86102158542e-11
- Acres ac 2.47105381467e-8
- Roods ro 9.88421525869e-8
- Square rods rd² 0.000 003 953 686 103 47
- Sections section 3.86102158542e-11
- Townships twp 1.07250599595e-12
- Roofing squares sq 0.000 010 763 910 416 7
- Circular mils cmil 197 352.524 139
- Barns b 1e+24
- Tsubos 坪 0.000 030 25
Every row is Square centimeter (cm²) converted through the square meter, in exact rational arithmetic.
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.