640.5 darcy = 640,500 mD
| darcy | mD |
|---|---|
| 625.5 darcy | 625,500 |
| 630.5 darcy | 630,500 |
| 635.5 darcy | 635,500 |
| 640.5 | 640,500 |
| 645.5 darcy | 645,500 |
| 650.5 darcy | 650,500 |
| 655.5 darcy | 655,500 |
640.5 darcy = 640,500 mD
1 darcy = 1,000 millidarcy (mD) · 1 mD = 1,000 microdarcy (μD) · 1 darcy ≈ 9.869×10⁻¹³ m²