Permeability
in²tokD
Convert square inches (permeability) (in²) to kilodarcy (kD).
Factor1 in² = 653708.3 kD
Converter
in²
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kD
Rendered to 6 significant figures.
Formula
Formula
kD = in² × 653708.3
Multiply any value in square inches (permeability) by 653708.3 to obtain the value in kilodarcy.
Worked example
Convert 1 in² to kD.
- 01Start with 1 in².
- 02Multiply by the conversion factor: 1 × 653708.3 = 653708 kD.
Result1 in² = 653708 kD
Conversion table
| in² | kD |
|---|---|
| 1 | 6.5371e+5 |
| 2 | 1.3074e+6 |
| 5 | 3.2685e+6 |
| 10 | 6.5371e+6 |
| 20 | 1.3074e+7 |
| 50 | 3.2685e+7 |
| 100 | 6.5371e+7 |
| 200 | 1.3074e+8 |
| 500 | 3.2685e+8 |
| 1000 | 6.5371e+8 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from in² to kD?
1 in² equals 653708.3 kD. To convert, multiply the value in square inches (permeability) by 653708.3.
How do I convert 1 in² to kD?
1 in² = 653708 kD. For any value, multiply by 653708.3.
How do I convert kD back to in²?
Divide by the same factor — or equivalently, multiply by 1.529734e-6. So 1 kD = 1.52973e-6 in².
When would I need to convert square inch (permeability) to kilodarcy?
Permeability conversions between in² and kD 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).