Permeability
DtonD
Convert darcy (D) to nanodarcy (nD).
Factor1 D = 1e+9 nD
Converter
D
Accepts numbers or expressions, e.g. 150 + 14.7
Result
nD
Rendered to 6 significant figures.
Formula
Formula
nD = D × 1e+9
Multiply any value in darcy by 1e+9 to obtain the value in nanodarcy.
Worked example
Convert 1 D to nD.
- 01Start with 1 D.
- 02Multiply by the conversion factor: 1 × 1e+9 = 1e+9 nD.
Result1 D = 1e+9 nD
Conversion table
| D | nD |
|---|---|
| 1 | 1e+9 |
| 2 | 2e+9 |
| 5 | 5e+9 |
| 10 | 1e+10 |
| 20 | 2e+10 |
| 50 | 5e+10 |
| 100 | 1e+11 |
| 200 | 2e+11 |
| 500 | 5e+11 |
| 1000 | 1e+12 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from D to nD?
1 D equals 1e+9 nD. To convert, multiply the value in darcy by 1e+9.
How do I convert 1 D to nD?
1 D = 1e+9 nD. For any value, multiply by 1e+9.
How do I convert nD back to D?
Divide by the same factor — or equivalently, multiply by 1e-9. So 1 nD = 1e-9 D.
When would I need to convert darcy to nanodarcy?
Permeability conversions between D 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).