Convert Millimetre squared to Microdarcy
Convert Millimetre squared (mm²) to Microdarcy (µD) instantly and accurately.
Conversion Formula
µD = mm² × 1013250000000
About Millimetre squared
The millimetre squared (mm²) equals 10⁻⁶ m² ≈ 1.013 × 10⁹ D, representing extremely high permeabilities beyond the range of most geological materials. It appears in geotechnical research for open rock fractures, coarse gravel channel beds, and large-cell open-foam engineered materials. 1 mm² = 10⁶ µm² = 10⁻⁶ m².
About Microdarcy
The microdarcy (µD) equals 10⁻⁶ D ≈ 9.869 × 10⁻¹⁹ m², used for tight gas sands, coalbed methane matrix, and low-permeability carbonates. North Sea tight sandstones: 0.01-1 µD; coalbed methane matrix: 1-100 µD; mudrock caprocks: 0.001-1 µD. 1 µD = 10⁻³ mD = 10³ nD.
Quick Reference Table
| Millimetre squared (mm²) | Microdarcy (µD) |
|---|---|
| 1 mm² | 1.013 × 1012 µD |
| 2 mm² | 2.026 × 1012 µD |
| 5 mm² | 5.066 × 1012 µD |
| 10 mm² | 1.013 × 1013 µD |
| 25 mm² | 2.533 × 1013 µD |
| 50 mm² | 5.066 × 1013 µD |
| 100 mm² | 1.013 × 1014 µD |