Millidarcies to Darcies (mD to D) Converter

How to convert millidarcies to darcies

FormulaD = mD × 0.001

Multiply the value in millidarcies by 0.001. To go the other way, multiply by 1,000 (or divide by 0.001).

A millidarcy is smaller than a darcy: it takes 1,000 millidarcies to make one darcy.

Worked examples

1 millidarcy1 mD × 0.001 = 0.001 D
5 millidarcies5 mD × 0.001 = 0.005 D
10 millidarcies10 mD × 0.001 = 0.01 D
20 millidarcies20 mD × 0.001 = 0.02 D
100 millidarcies100 mD × 0.001 = 0.1 D

Millidarcies to darcies conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Millidarcies to darcies: 0.1–10 mD
Millidarcies (mD)	Darcies (D)
0.1 mD	0.0001 D
0.25 mD	0.00025 D
0.5 mD	0.0005 D
1 mD	0.001 D
2 mD	0.002 D
3 mD	0.003 D
4 mD	0.004 D
5 mD	0.005 D
6 mD	0.006 D
7 mD	0.007 D
8 mD	0.008 D
9 mD	0.009 D
10 mD	0.01 D

Millidarcies to darcies: 12–1,000 mD
Millidarcies (mD)	Darcies (D)
12 mD	0.012 D
15 mD	0.015 D
20 mD	0.02 D
25 mD	0.025 D
30 mD	0.03 D
40 mD	0.04 D
50 mD	0.05 D
75 mD	0.075 D
100 mD	0.1 D
250 mD	0.25 D
500 mD	0.5 D
1,000 mD	1 D

About the units

Millidarcy (mD)

The millidarcy (mD) is a unit of permeability (porous media). One millidarcy equals 9.869233×10⁻¹⁶ square meters (m²).

Darcy (D)

Defined so that 1 cm³/s of a 1 cP fluid flows through 1 cm² under 1 atm/cm; ≈ 9.869233 × 10⁻¹³ m². One darcy equals 9.869233×10⁻¹³ square meters (m²).

Frequently asked questions

How many darcies are in one millidarcy?

There are 0.001 darcies in one millidarcy.

How do I convert millidarcies to darcies?

Multiply the number of millidarcies by 0.001. For example, 10 mD × 0.001 = 0.01 D.

How many millidarcies are in one darcy?

One darcy equals 1,000 millidarcies. That is the reverse factor, 1 ÷ 0.001.

What is 10 millidarcies in darcies?

10 mD = 0.01 D.

Is this mD to D converter accurate?

The conversion uses the accepted reference value. Results are shown to 12 significant figures by default; adjust precision in the converter.