# Porosity

Porosity, abbreviated as P, is the ratio between the pore volume of a substance and its total volume. Porosity of a measure of a rocks capacity to store fluids.

### Porosity formula

\(\large{ P = \frac {V_v} {V_t } }\)

Where:

\(\large{ P }\) = porosity

\(\large{ V_t }\) = total volume

\(\large{ V_v }\) = voids volume

Solve for:

\(\large{ V_t = \frac { V_v} { P} }\)

\(\large{ V_v = P \; V_t }\)

Tags: Equations for Volume