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Permeability

Dtoµm²

Convert darcy (D) to square micrometres (permeability) (µm²).

Factor1 D = 0.9869233 µm²

Converter

D

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

Result
0.986923µm²

Rendered to 6 significant figures.

Formula

Formula
µm² = D × 0.9869233

Multiply any value in darcy by 0.9869233 to obtain the value in square micrometres (permeability).

Worked example

Convert 1 D to µm².

  1. 01Start with 1 D.
  2. 02Multiply by the conversion factor: 1 × 0.9869233 = 0.986923 µm².
Result1 D = 0.986923 µm²

Conversion table

Dµm²
10.98692
21.9738
54.9346
109.8692
2019.738
5049.346
10098.692
200197.38
500493.46
1000986.92

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from D to µm²?
1 D equals 0.9869233 µm². To convert, multiply the value in darcy by 0.9869233.
How do I convert 1 D to µm²?
1 D = 0.986923 µm². For any value, multiply by 0.9869233.
How do I convert µm² back to D?
Divide by the same factor — or equivalently, multiply by 1.01325. So 1 µm² = 1.01325 D.
When would I need to convert darcy to square micrometre (permeability)?
Permeability conversions between D and µm² 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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