Convert Foot squared to Millidarcy
Convert Foot squared (ft²) to Millidarcy (mD) instantly and accurately.
Conversion Formula
mD = ft² × 94134005280000
About Foot squared
The square foot (ft²) equals (0.3048 m)² = 9.290 304 × 10⁻² m² ≈ 9.41 × 10¹³ D. An imperial area unit included for unit-conversion completeness; it occasionally appears in US geotechnical reports where flow cross-sections are expressed in square feet. 1 ft² = 144 in² = 9.290 304 × 10⁻² m².
About Millidarcy
The millidarcy (mD) equals 10⁻³ D ≈ 9.869 × 10⁻¹⁶ m², the everyday unit in petroleum reservoir engineering worldwide. Conventional sandstone reservoirs: 1-1 000 mD; carbonate reservoirs: 0.1-100 mD; economic gas recovery typically requires k ≥ 0.1 mD. Permeameter and well-test reports give results in mD. 1 mD = 10⁻³ D = 10³ µD.
Quick Reference Table
| Foot squared (ft²) | Millidarcy (mD) |
|---|---|
| 1 ft² | 9.413 × 1013 mD |
| 2 ft² | 1.883 × 1014 mD |
| 5 ft² | 4.707 × 1014 mD |
| 10 ft² | 9.413 × 1014 mD |
| 25 ft² | 2.353 × 1015 mD |
| 50 ft² | 4.707 × 1015 mD |
| 100 ft² | 9.413 × 1015 mD |