Permeability
Dtoin²
Convert darcy (D) to square inches (permeability) (in²).
Factor1 D = 1.529734e-9 in²
Converter
D
Accepts numbers or expressions, e.g. 150 + 14.7
Result
in²
Rendered to 6 significant figures.
Formula
Formula
in² = D × 1.529734e-9
Multiply any value in darcy by 1.529734e-9 to obtain the value in square inches (permeability).
Worked example
Convert 1 D to in².
- 01Start with 1 D.
- 02Multiply by the conversion factor: 1 × 1.529734e-9 = 1.52973e-9 in².
Result1 D = 1.52973e-9 in²
Conversion table
| D | in² |
|---|---|
| 1 | 1.5297e-9 |
| 2 | 3.0595e-9 |
| 5 | 7.6487e-9 |
| 10 | 1.5297e-8 |
| 20 | 3.0595e-8 |
| 50 | 7.6487e-8 |
| 100 | 1.5297e-7 |
| 200 | 3.0595e-7 |
| 500 | 7.6487e-7 |
| 1000 | 1.5297e-6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from D to in²?
1 D equals 1.529734e-9 in². To convert, multiply the value in darcy by 1.529734e-9.
How do I convert 1 D to in²?
1 D = 1.52973e-9 in². For any value, multiply by 1.529734e-9.
How do I convert in² back to D?
Divide by the same factor — or equivalently, multiply by 6.537083e+8. So 1 in² = 6.53708e+8 D.
When would I need to convert darcy to square inch (permeability)?
Permeability conversions between D and in² 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).