Convert square millimeters to square centimeters
1 mm² = 0.01 cm² — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.01cm²
As a fraction: 1/100
More converter tools
Readable results
Ranges, ± tolerances, feet/inches and clock durations work in the value field.
Unit picker
Export this result
1 mm² = 0.01 cm²
Show this value in all 25 area units
- Square kilometers km² 1e-12
- Square hectometers hm² 1e-10
- Square decameters dam² 1e-8
- Square meters m² 0.000 001
- Square decimeters dm² 0.0001
- Square centimeters cm² 0.01
- Square millimeters mm² 1
- Square micrometers µm² 1 000 000
- Square nanometers nm² 1 000 000 000 000
- Hectares ha 1e-10
- Ares a 1e-8
- Decares daa 1e-9
- Square inches in² 0.001 550 003 100 01
- Square feet ft² 0.000 010 763 910 416 7
- Square yards yd² 0.000 001 195 990 046 3
- Square miles mi² 3.86102158542e-13
- Acres ac 2.47105381467e-10
- Roods ro 9.88421525869e-10
- Square rods rd² 3.95368610347e-8
- Sections section 3.86102158542e-13
- Townships twp 1.07250599595e-14
- Roofing squares sq 0.000 000 107 639 104 167
- Circular mils cmil 1973.525 241 39
- Barns b 1e+22
- Tsubos 坪 0.000 000 302 5
Every row is Square millimeter (mm²) converted through the square meter, in exact rational arithmetic.
How to convert square millimeters to square centimeters
Multiply the number of square millimeters by 0.01 to get square centimeters.
The exact factor is 0.01 — as a fraction, 1/100.
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 |
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 |
Frequently asked
How many square centimeters are in a square millimeter?
One square millimeter equals 0.01 square centimeters (mm² → cm²). That figure is exact, not rounded.
How do you convert square millimeters to square centimeters?
Multiply the number of square millimeters by 0.01 to get square centimeters.
What is 1 cm² in square millimeters?
One square centimeter is 100 square millimeters.
What is 10 mm² in cm²?
10 mm² = 0.1 cm².