Permeability (Porous Media) Converter
Convert between 5 permeability units instantly. Enter a value, pick your units and get the result with the formula, a full conversion table and worked examples.
1 D in all permeability units
Updates live as you type. Click a row to set it as the target unit.
| Unit | Symbol | Value |
|---|---|---|
| Millidarcy | mD | 1,000 |
| Darcy | D | 1 |
| Sq centimetre | cm² | 9.86923 × 10−9 |
| Sq foot | ft² | 1.06232 × 10−11 |
| Sq metre | m² | 9.86923 × 10−13 |
How to Convert Permeability Units
Permeability measures how easily a fluid flows through a porous material such as rock, soil or a filter. The SI unit is the square metre (m²); petroleum engineering uses the darcy and millidarcy.
Every unit on this page is stored as a fixed factor relative to one reference unit, the sq metre (m²). Converting is a two step multiply and divide:
- Multiply your value by the factor of the source unit to get the value in m².
- Divide that result by the factor of the target unit.
Darcy to Sq metre conversion table
| Darcy (D) | Sq metre (m²) |
|---|---|
| 1 D | 9.86923 × 10−13 m² |
| 2 D | 1.97385 × 10−12 m² |
| 3 D | 2.96077 × 10−12 m² |
| 4 D | 3.94769 × 10−12 m² |
| 5 D | 4.93462 × 10−12 m² |
| 6 D | 5.92154 × 10−12 m² |
| 7 D | 6.90846 × 10−12 m² |
| 8 D | 7.89539 × 10−12 m² |
| 9 D | 8.88231 × 10−12 m² |
| 10 D | 9.86923 × 10−12 m² |
| 15 D | 1.48038 × 10−11 m² |
| 20 D | 1.97385 × 10−11 m² |
| 25 D | 2.46731 × 10−11 m² |
| 30 D | 2.96077 × 10−11 m² |
| 40 D | 3.94769 × 10−11 m² |
| 50 D | 4.93462 × 10−11 m² |
| 75 D | 7.40192 × 10−11 m² |
| 100 D | 9.86923 × 10−11 m² |
| 250 D | 2.46731 × 10−10 m² |
| 500 D | 4.93462 × 10−10 m² |
| 1,000 D | 9.86923 × 10−10 m² |
Permeability Units and Conversion Factors
Value of one unit expressed in m².
| Unit | Symbol | In m² |
|---|---|---|
| Millidarcy | mD | 9.869233 × 10−16 |
| Darcy | D | 9.869233 × 10−13 |
| Sq centimetre | cm² | 0.0001 |
| Sq foot | ft² | 0.09290304 |
| Sq metre | m² | 1 |
Frequently Asked Questions
What is the SI unit of permeability?
The SI unit of permeability is the sq metre (m²). Permeability measures how easily a fluid flows through a porous material such as rock, soil or a filter.
How do I convert darcy to m²?
To convert darcy (D) to sq metre (m²), multiply the value in darcy by 9.86923 × 10−13. For example, 1 D = 9.86923 × 10−13 m².
How do I convert mD to darcy?
To convert millidarcy (mD) to darcy (D), multiply the value in mD by 0.001. For example, 1 mD = 0.001 D.
How do I convert m² to mD?
To convert sq metre (m²) to millidarcy (mD), multiply the value in m² by 1.01325 × 1015. For example, 1 m² = 1.01325 × 1015 mD.
Can I see a value in every permeability unit at once?
Yes. Enter a value and choose the source unit; the "all units" table below the converter instantly lists the equivalent in all 5 supported units. Click any row to make it the target unit.
More Fluids Converters
Popular Engineering Converters
Frequently used tools from our full library of 76 unit converters.