Convert Darcy to Micrometre squared
Convert Darcy (D) to Micrometre squared (µm²) instantly and accurately.
Conversion Formula
µm² = D × 0.9869232667
About Darcy
The darcy (D) ≈ 9.869 × 10⁻¹³ m², the oilfield-standard permeability unit defined by Darcy's law: 1 D passes 1 cm³/s of 1 cP fluid through 1 cm² cross-section under a 1 atm/cm gradient. Highly permeable consolidated sandstone: 1-5 D; unconsolidated sand: 5-20 D. 1 D = 1 000 mD ≈ 0.9869 µm².
About Micrometre squared
The micrometre squared (µm²) equals 10⁻¹² m², the SI-consistent permeability unit used in European reservoir standards and ISO documents. 1 µm² ≈ 1.0133 D - numerically close to but distinct from the darcy. Clean gravel: 1-10 µm²; clean sandstone: 10⁻³-0.1 µm². 1 µm² = 10⁶ nm² = 10⁻⁶ mm².
Quick Reference Table
| Darcy (D) | Micrometre squared (µm²) |
|---|---|
| 1 D | 0.986923 µm² |
| 2 D | 1.97385 µm² |
| 5 D | 4.93462 µm² |
| 10 D | 9.86923 µm² |
| 25 D | 24.6731 µm² |
| 50 D | 49.3462 µm² |
| 100 D | 98.6923 µm² |