Convert Millidarcy to Darcy
Live bidirectional calculator for Millidarcies (mD) and Darcies (D) with verified formula and conversion charts.
Permeability6 units
How the Calculation Works (Linear Scaling)
Since 1 Darcy = 1000 Millidarcies, divide the value in Millidarcies by 1000.
Millidarcy to Darcy Conversion Table
Precomputed values for quick reference and printing.
| Millidarcy | Darcy |
|---|---|
| 1 mD | 0.001 D |
| 2 mD | 0.002 D |
| 3 mD | 0.003 D |
| 4 mD | 0.004 D |
| 5 mD | 0.005 D |
| 6 mD | 0.006 D |
| 7 mD | 0.007 D |
| 8 mD | 0.008 D |
| 9 mD | 0.009 D |
| 10 mD | 0.01 D |
| 15 mD | 0.015 D |
| 20 mD | 0.02 D |
| 25 mD | 0.025 D |
| 30 mD | 0.03 D |
| 40 mD | 0.04 D |
| 50 mD | 0.05 D |
| 75 mD | 0.075 D |
| 100 mD | 0.1 D |
| Darcy | Millidarcy |
|---|---|
| 1 D | 1000 mD |
| 2 D | 2000 mD |
| 3 D | 3000 mD |
| 4 D | 4000 mD |
| 5 D | 5000 mD |
| 6 D | 6000 mD |
| 7 D | 7000 mD |
| 8 D | 8000 mD |
| 9 D | 9000 mD |
| 10 D | 10000 mD |
| 15 D | 15000 mD |
| 20 D | 20000 mD |
| 25 D | 25000 mD |
| 30 D | 30000 mD |
| 40 D | 40000 mD |
| 50 D | 50000 mD |
| 75 D | 75000 mD |
| 100 D | 100000 mD |
๐ Standard Benchmark Reference Values
Petroleum core plug permeability metric submultiple.
Exact RatioAbout Millidarcy (mD)
One thousandth of a darcy, equal to approximately 9.869233 ร 10โปยนโถ mยฒ (~0.9869233 ฮผmยฒ).
History: The most commonly encountered unit in routine petroleum core analysis and tight-gas reservoir engineering.
Common Uses: Hydrocarbon core plug permeability measurements (typical reservoir rocks range from 0.1 mD to several hundred mD).
About Darcy (D)
The standard petroleum engineering and hydrology unit of intrinsic permeability, defined as the permeability of a porous medium that allows a flow of 1 cmยณ/s of fluid with 1 cP viscosity through a 1 cmยฒ cross-section under a pressure gradient of 1 atm/cm (exact definition: 9.869233 ร 10โปยนยณ mยฒ).
History: Named in honor of French hydraulic engineer Henry Darcy (1803โ1858) following his pioneering 1856 study "Les Fontaines Publiques de la Ville de Dijon".
Common Uses: Petroleum reservoir rock permeability ratings (prolific sandstone reservoirs exhibit ~1 D permeability), groundwater aquifer characterization.
โ Frequently Asked Questions
How many Darcies are in 1 Millidarcy?
There are exactly 0.001 Darcies in 1 Millidarcy (1 mD = 0.001 D).
What is the formula to convert Millidarcy to Darcy?
The formula is: Darcy = Millidarcy / 1000. Since 1 Darcy = 1000 Millidarcies, divide the value in Millidarcies by 1000.
How do I convert 1 mD to D manually?
To convert 1 mD to D: apply the formula Darcy = Millidarcy / 1000. Substituting gives: 1 / 1000 = 0.001 D.