Square Metre (m²)
Intrinsic permeability is a property of the porous medium alone, independent of the fluid, and has the dimension of area. In SI it is in square metres: about 10⁻¹¹ m² for clean sand and 10⁻¹⁸ m² for clay.
Symbol: m² (ASCII: m2)
Quantity: intrinsic permeability of a porous medium
SI relation: m² is the coherent SI unit of intrinsic permeability.
Derivation: Intrinsic permeability k has dimension of area: k = K μ / (ρ g).
Exact: yes, by definition
Typical uses
- Reservoir and porous-media flow
- Relating hydraulic conductivity of water to oil or air
- Filter media and membranes
Convert square metres to other units
| Conversion | 1 m² equals | Reverse |
|---|---|---|
| square metre to darcy | 1013249966000 D | darcy to square metre |
| square metre to millidarcy | 1.013249966 × 10¹⁵ mD | millidarcy to square metre |
| square metre to square micrometre | 1000000000000 µm² | square micrometre to square metre |
| square metre to square centimetre | 10000 cm² | square centimetre to square metre |
Open the Permeability Converter (Darcy, Millidarcy, m²) to convert any value between all units.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units) and Table 8 (non-SI units accepted for use with the SI).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Square Metre (m²). Retrieved October 29, 2026, from https://scientificconverters.com/units/square-meter-permeability/
IEEE
Scientific Converters, "Square Metre (m²)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/units/square-meter-permeability/