Square millimetres to square metres converter
Square metres (m²)
1 square millimetre = 0.000001 square metres
How to convert square millimetres to square metres
m² = mm² × 0.000001
Multiply the number of square millimetres by 0.000001 to get square metres. Going the other way, divide by 0.000001 (or multiply by 1000000).
One square millimetre is exactly defined as 0.000001 square metres (to 12 significant figures), and one square metre is 1000000 square millimetres.
Worked examples
- Convert 5 square millimetres: 5 × 0.000001 = 0.000005 0.000005 square metres.
- Convert 12.5 square millimetres: 12.5 × 0.000001 = 0.0000125 0.0000125 square metres.
- Convert 250 square millimetres: 250 × 0.000001 = 0.00025 0.00025 square metres.
Quick-reference table
| mm² | m² |
|---|---|
| 1 | 0.000001 |
| 2 | 0.000002 |
| 3 | 0.000003 |
| 5 | 0.000005 |
| 10 | 0.00001 |
| 15 | 0.000015 |
| 20 | 0.00002 |
| 25 | 0.000025 |
| 50 | 0.00005 |
| 75 | 0.000075 |
| 100 | 0.0001 |
| 1,000 | 0.001 |
| m² | mm² |
|---|---|
| 1 | 1,000,000 |
| 2 | 2,000,000 |
| 3 | 3,000,000 |
| 5 | 5,000,000 |
| 10 | 10,000,000 |
| 15 | 15,000,000 |
| 20 | 20,000,000 |
| 25 | 25,000,000 |
| 50 | 50,000,000 |
| 75 | 75,000,000 |
| 100 | 100,000,000 |
| 1,000 | 1,000,000,000 |
Related conversions
Frequently asked questions
How many square metres are in 1 square millimetre?
1 square millimetre equals 0.000001 square metres.
What is the formula to convert square millimetres to square metres?
Use m² = mm² × 0.000001. Multiply the number of square millimetres by 0.000001 to get square metres. Going the other way, divide by 0.000001 (or multiply by 1000000).
What is 100 square millimetres in square metres?
100 square millimetres is 0.0001 square metres.