Permeability Converter
Permeability measures how easily a fluid flows through a porous material such as rock or soil. It has the dimensions of area; the practical unit is the darcy, about 0.987 square micrometres.
1 Darcy = 1,000 Millidarcy
How to convert Darcy to Millidarcy
One Darcy equals 1,000 Millidarcy, so multiply any value in darcy by 1,000 to get md. To convert back, divide by 1,000 — or multiply by 0.001.
md = darcy × 1,000
Example: 25 darcy × 1,000 = 25,000 md.
Darcy to Millidarcy table
| Darcy (darcy) | Millidarcy (md) |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 4 | 4,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 15 | 15,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 75 | 75,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
| 1,000 | 1,000,000 |
Millidarcy to Darcy table
| Millidarcy (md) | Darcy (darcy) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 10 | 0.01 |
| 15 | 0.015 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 75 | 0.075 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1,000 | 1 |
Permeability units at a glance
All 9 units this converter supports, each expressed in Meter² (m²) and the other way round.
| Unit | Symbol | 1 unit in m² | 1 m² in unit |
|---|---|---|---|
| Meter² | m² | 1 | 1 |
| Square Centimeter | cm² | 0.0001 | 10,000 |
| Darcy | darcy | 9.869233e-13 | 1,013,249,966,000 |
| Millidarcy | md | 9.869233e-16 | 1.013249966e+15 |
| Micrometer² | um² | 1e-12 | 1,000,000,000,000 |
| Square Foot | ft² | 0.09290304 | 10.76391042 |
| Square Inch | in² | 0.00064516 | 1,550.0031 |
| Permeability (oilfield) | perm | 9.869233e-13 | 1,013,249,966,000 |
| Barn | b | 1e-28 | 1e+28 |
Where permeability conversions are used
Oil and gas reservoir engineering, groundwater hydrology, and filtration.
Frequently asked questions
What is 1 Darcy in Millidarcy?
1 Darcy (darcy) is 1,000 Millidarcy (md).
What is 1 Millidarcy in Darcy?
1 Millidarcy (md) is 0.001 Darcy (darcy).
How do I convert Darcy to Millidarcy?
Multiply the value in Darcy by 1,000. For example, 5 darcy × 1,000 = 5,000 md. To go the other way, divide by 1,000.
How many units does the permeability converter support?
It converts between 9 units: Meter², Square Centimeter, Darcy, Millidarcy, Micrometer², Square Foot, Square Inch, Permeability (oilfield), Barn.
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Figures on this page are calculated with the same conversion factors as the converter above and shown to up to 10 significant figures. See our disclaimer before relying on a result in a professional or safety-critical context.