# Degree of Saturation

Degree of saturation, abbreviated as S, a dimensionless number, is the ratio of volume of water to the volume of voids.

## Degree of Saturation formulas

\(\large{ S = \frac{V_w}{V_v } \; 100 }\) |

\(\large{ S = \frac{w \; SG_s }{ e } }\) |

### Where:

Units |
English |
Metric |

\(\large{ S }\) = degree of saturation (expressed as %) | \(\large{dimensionless}\) | |

\(\large{ SG_s } \) = specific gravity of soil | \(\large{dimensionless}\) | |

\(\large{ e }\) = void ratio | \(\large{dimensionless}\) | |

\(\large{ V_v }\) = volume of voids (air and water) | \(\large{ft^3}\) | \(\large{m^3}\) |

\(\large{ V_w} \) = volume of water | \(\large{ft^3}\) | \(\large{m^3}\) |

Tags: Volume Equations Soil Equations Geotechnical Equations