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Permeability

mDtoµD

Convert millidarcy (mD) to microdarcy (µD).

Factor1 mD = 1000 µD

Converter

mD

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

Result
1000µD

Rendered to 6 significant figures.

Formula

Formula
µD = mD × 1000

Multiply any value in millidarcy by 1000 to obtain the value in microdarcy.

Worked example

Convert 1 mD to µD.

  1. 01Start with 1 mD.
  2. 02Multiply by the conversion factor: 1 × 1000 = 1000 µD.
Result1 mD = 1000 µD

Conversion table

mDµD
11000
22000
55000
1010000
2020000
5050000
1001.0000e+5
2002.0000e+5
5005.0000e+5
10001.0000e+6

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mD to µD?
1 mD equals 1000 µD. To convert, multiply the value in millidarcy by 1000.
How do I convert 1 mD to µD?
1 mD = 1000 µD. For any value, multiply by 1000.
How do I convert µD back to mD?
Divide by the same factor — or equivalently, multiply by 0.001. So 1 µD = 0.001 mD.
When would I need to convert millidarcy to microdarcy?
Permeability conversions between mD and µD 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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