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Permeability

Dtoft²

Convert darcy (D) to square feet (permeability) (ft²).

Factor1 D = 1.062315e-11 ft²

Converter

D

Accepts numbers or expressions, e.g. 150 + 14.7

Result
1.06232e-11ft²

Rendered to 6 significant figures.

Formula

Formula
ft² = D × 1.062315e-11

Multiply any value in darcy by 1.062315e-11 to obtain the value in square feet (permeability).

Worked example

Convert 1 D to ft².

  1. 01Start with 1 D.
  2. 02Multiply by the conversion factor: 1 × 1.062315e-11 = 1.06232e-11 ft².
Result1 D = 1.06232e-11 ft²

Conversion table

Dft²
11.0623e-11
22.1246e-11
55.3116e-11
101.0623e-10
202.1246e-10
505.3116e-10
1001.0623e-9
2002.1246e-9
5005.3116e-9
10001.0623e-8

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from D to ft²?
1 D equals 1.062315e-11 ft². To convert, multiply the value in darcy by 1.062315e-11.
How do I convert 1 D to ft²?
1 D = 1.06232e-11 ft². For any value, multiply by 1.062315e-11.
How do I convert ft² back to D?
Divide by the same factor — or equivalently, multiply by 9.4134e+10. So 1 ft² = 9.4134e+10 D.
When would I need to convert darcy to square foot (permeability)?
Permeability conversions between D and ft² 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).

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