Permeability
mDtonD
Convert millidarcy (mD) to nanodarcy (nD).
Factor1 mD = 1000000 nD
Converter
mD
Accepts numbers or expressions, e.g. 150 + 14.7
Result
nD
Rendered to 6 significant figures.
Formula
Formula
nD = mD × 1000000
Multiply any value in millidarcy by 1000000 to obtain the value in nanodarcy.
Worked example
Convert 1 mD to nD.
- 01Start with 1 mD.
- 02Multiply by the conversion factor: 1 × 1000000 = 1.00000e+6 nD.
Result1 mD = 1.00000e+6 nD
Conversion table
| mD | nD |
|---|---|
| 1 | 1.0000e+6 |
| 2 | 2.0000e+6 |
| 5 | 5.0000e+6 |
| 10 | 1e+7 |
| 20 | 2e+7 |
| 50 | 5e+7 |
| 100 | 1e+8 |
| 200 | 2e+8 |
| 500 | 5e+8 |
| 1000 | 1e+9 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mD to nD?
1 mD equals 1000000 nD. To convert, multiply the value in millidarcy by 1000000.
How do I convert 1 mD to nD?
1 mD = 1.00000e+6 nD. For any value, multiply by 1000000.
How do I convert nD back to mD?
Divide by the same factor — or equivalently, multiply by 1e-6. So 1 nD = 1e-6 mD.
When would I need to convert millidarcy to nanodarcy?
Permeability conversions between mD and nD appear in petroleum and reservoir engineering, hydrogeology, geotechnical engineering, packed-bed filtration and porous-materials research. The darcy (D) and its sub-multiples (mD, µD, nD) dominate petroleum-engineering documentation; SI area-equivalent units (m², µm², mm², cm², ft²) appear in geophysics and porous-media research. Intrinsic permeability is a property of the porous medium alone — this category does NOT include hydraulic conductivity (m/s, requires fluid density and viscosity), gas permeability (Klinkenberg slip corrections) or membrane-permeability coefficients, all of which are different physical quantities and require explicit assumptions.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).