Millidarcy to Darcy (mD to D) Converter & Formula
mD × 0.001 = D
Calculation: 1 mD × 0.001 = 0.001 D
Common Millidarcy to Darcy Calculations
Quick-lookup reference table showing calculated equivalents for standard increments between Millidarcy (mD) and Darcy (D).
| Conversion & Equivalent Value | Scientific Notation |
|---|---|
| 0.001 mD is equal to 1 × 10⁻⁶ D (Darcy) | 1 × 10⁻⁶ |
| 0.01 mD is equal to 1 × 10⁻⁵ D (Darcy) | 1 × 10⁻⁵ |
| 0.1 mD is equal to 0.0001 D (Darcy) | 1 × 10⁻⁴ |
| 0.5 mD is equal to 0.0005 D (Darcy) | 5 × 10⁻⁴ |
| 1 mD is equal to 0.001 D (Darcy) | 1 × 10⁻³ |
| 2 mD is equal to 0.002 D (Darcy) | 2 × 10⁻³ |
| 5 mD is equal to 0.005 D (Darcy) | 5 × 10⁻³ |
| 10 mD is equal to 0.01 D (Darcy) | 1 × 10⁻² |
| 20 mD is equal to 0.02 D (Darcy) | 2 × 10⁻² |
| 25 mD is equal to 0.025 D (Darcy) | 2.5 × 10⁻² |
| 50 mD is equal to 0.05 D (Darcy) | 5 × 10⁻² |
| 100 mD is equal to 0.1 D (Darcy) | 1 × 10⁻¹ |
| 250 mD is equal to 0.25 D (Darcy) | 2.5 × 10⁻¹ |
| 500 mD is equal to 0.5 D (Darcy) | 5 × 10⁻¹ |
| 1000 mD is equal to 1 D (Darcy) | 1 × 10⁰ |
| Reciprocal & Equivalent Value | Scientific Notation |
|---|---|
| 1 D is equal to 1000 mD (Millidarcy) | 1 × 10³ |
| 5 D is equal to 5000 mD (Millidarcy) | 5 × 10³ |
| 10 D is equal to 10000 mD (Millidarcy) | 1 × 10⁴ |
| 50 D is equal to 50000 mD (Millidarcy) | 5 × 10⁴ |
| 100 D is equal to 100000 mD (Millidarcy) | 1 × 10⁵ |
Real-World Context & Everyday Benchmarks
Tap to load into converterTo help contextualize these units in everyday life, science, and engineering, here are verified real-world reference points for Millidarcy (mD) and Darcy (D):
Millidarcy References:
- Shale gas hydraulic fracturing formation permeability target 0.01 mD
- Geothermal fractured crystalline granite reservoir permeability 50 mD
- High-permeability agricultural irrigation sandy soil 5000 mD
Darcy References:
- Highly productive commercial oil and gas sandstone reservoir 1 D
- Moderate commercial oil reservoir sand formation 0.1 D
- Tight gas sandstone requiring hydraulic fracturing stimulation 0.001 D
How to Convert Millidarcy to Darcy
Converting Millidarcy (mD) to Darcy (D) is a core calculation in Geological Intrinsic Permeability, which measures the capacity of a porous rock, sand, or geological formation to transmit fluids under a hydraulic pressure gradient governed by Darcy's Law. Both units reside within the International System of Units (SI) and share an identical physical dimension vector ([L²]), separated strictly by a decimal order-of-magnitude factor (10^-3). Because this shift involves integer powers of 10, the conversion is mathematically exact and free from decimal rounding or irrational fractional loss. Exactly 1 Millidarcy equals 0.001 Darcy.
Mathematical Conversion Derivation via Coherent SI Base Unit
Under the International System of Quantities (ISQ), dimensional conversion between non-SI units is rigorously resolved by bridging through the coherent SI base unit (square meter (m²)) without arbitrary rounding:
1 mD = 9.869233 × 10⁻¹⁶ square meter (m²)1 D = 9.869233 × 10⁻¹³ square meter (m²)V(D) = V(mD) × ( 9.869233 × 10⁻¹⁶ / 9.869233 × 10⁻¹³ ) = V(mD) × 0.001Value in Darcy = Value in Millidarcy × 0.001Direct computational formula applied for standard conversion.To convert 120 Millidarcy (mD) to Darcy (D): multiply 120 by 0.001 to get 0.12 D. At an industrial engineering scale, 480 mD converts to 0.48 D.
Inverse check: 1 D = 1000 mD.Understanding Millidarcy and Darcy
Millidarcy
mDA Millidarcy (mD) is a decimal submultiple of the SI-derived unit for geological intrinsic permeability.
Applications & Practical Context
In practical geological permeability terms, a shale gas hydraulic fracturing formation permeability target equals 0.01 mD, a geothermal fractured crystalline granite reservoir permeability equals 50 mD, a high-permeability agricultural irrigation sandy soil equals 5000 mD.
A physical magnitude of 1 mD corresponds to 9.869233 × 10⁻¹⁶ m² in standard SI measurement.
1 mD = 9.869233 × 10⁻¹⁶ m²Darcy
DA Darcy (D) is a recognized unit for geological intrinsic permeability.
Applications & Practical Context
In practical geological permeability terms, a highly productive commercial oil and gas sandstone reservoir equals 1 D, a moderate commercial oil reservoir sand formation equals 0.1 D, a tight gas sandstone requiring hydraulic fracturing stimulation equals 0.001 D.
A physical magnitude of 1 D corresponds to 9.869233 × 10⁻¹³ m² in standard SI measurement.
1 D = 9.869233 × 10⁻¹³ m²Domain Metrology & Engineering Applications
Darcy's Law of Porous Media Fluid Flow (Q = -kA/μ · ΔP/L)
Rigorously quantified in laboratory and field settings using core flooding Hassler sleeve permeameters, steady-state gas permeameters, and drill stem testing (DST) bottom-hole pressure gauges.
Applied across petroleum reservoir engineering, hydrogeological aquifer modeling, carbon capture and geological sequestration (CCS), and geothermal energy extraction under international metrology standard API RP 40, ISO 80000-4:2019.
Formulas, conversion coefficients, and base definitions on this page strictly adhere to the API RP 40, ISO 80000-4:2019 and the BIPM SI Brochure (9th Edition). Governed by Darcy's Law of Porous Media Fluid Flow (Q = -kA/μ · ΔP/L) under ISO 80000 dimensional vector [L²].
