Kozeny-Carman Porous Media Permeability Calculator
Hydrogeology & geotechnical porous flow: Compute absolute permeability ($k$), hydraulic conductivity ($K_H$), specific surface area per unit volume ($S_v$), and tortuosity ($\tau$) from grain size and porosity.
Grain Size Distribution & Porosity
Hazen 10% passing sieve diameter
Pore volume / total volume
Actual path / straight length
Permeability & Hydraulic Conductivity
Absolute Permeability k:
--
Darcys (D)
Hydraulic Conductivity K_H:
--
m / s
Permeability in m²:
--
m² (SI units)
Specific Surface S_v:
--
cm⁻¹
Void Ratio e:
--
e = ϕ / (1 - ϕ)
Hydrogeological Classification
Hydraulic Transmissivity per 10m:
-- m²/day
Pore Throat Hydraulic Radius r_h:
-- μm
Aquifer Transmissivity Class:
--
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