Darcy to millidarcy
Type a value in D to get it in mD instantly.
100,000mD
That's 1,000× as permeable as reservoir sandstone, while clean gravel is 10× higher. For water that is a hydraulic conductivity of about 9.66 cm/s.
Convert the other way: mD to D
What it means
How well does it flow?
Hydraulic conductivity assumes water at 20 °C. For oil or gas the same rock gives a different figure.
The math
How to convert D to mD
To convert darcy to millidarcy, multiply by 1,000.
Example: 100 D × 1,000 = 100,000 mD.
In the other direction, 1 mD = 0.001 D.
Every unit
Your permeability in every unit
Tables
D to mD conversion table
| D | mD |
|---|---|
| 0.01 D | 10 mD |
| 0.1 D | 100 mD |
| 1 D | 1,000 mD |
| 5 D | 5,000 mD |
| 10 D | 10,000 mD |
| 50 D | 50,000 mD |
| 100 D | 100,000 mD |
| 250 D | 250,000 mD |
| 500 D | 500,000 mD |
| 1,000 D | 1,000,000 mD |
| 5,000 D | 5,000,000 mD |
mD to D conversion table
| mD | D |
|---|---|
| 0.01 mD | 1×10⁻⁵ D |
| 0.1 mD | 0.0001 D |
| 1 mD | 0.001 D |
| 5 mD | 0.005 D |
| 10 mD | 0.01 D |
| 50 mD | 0.05 D |
| 100 mD | 0.1 D |
| 250 mD | 0.25 D |
| 500 mD | 0.5 D |
| 1,000 mD | 1 D |
| 5,000 mD | 5 D |
Quick answers
Quick answers
- How many mD is 1 D?
- 1 D is 1,000 mD.
- How many mD is 10 D?
- 10 D is 10,000 mD.
- How many mD is 100 D?
- 100 D is 100,000 mD.
The units
About these units
Darcy (D)
The standard unit of permeability, named after Henry Darcy.
Millidarcy (mD)
A thousandth of a darcy, the working unit of oil and gas reservoirs.
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