Convert Micrometre squared to Darcy
Convert Micrometre squared (µm²) to Darcy (D) instantly and accurately.
Conversion Formula
D = µm² × 1.01325
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.
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.
Quick Reference Table
| Micrometre squared (µm²) | Darcy (D) |
|---|---|
| 1 µm² | 1.01325 D |
| 2 µm² | 2.0265 D |
| 5 µm² | 5.06625 D |
| 10 µm² | 10.1325 D |
| 25 µm² | 25.3313 D |
| 50 µm² | 50.6625 D |
| 100 µm² | 101.325 D |