# Dry Bulk Density of Soil

Dry bulk density of soil, abbreviated as \(Y_{dry}\), is the ratio between the total mass of soil and the total volume of soil.

## Dry bulk density of soil formulas

\(\large{ Y_{dry} = \frac { M_s} {V_t } }\) | |

\(\large{ Y_{dry} = \frac{ G_s }{ 1 \;+\; e } \; \rho_w }\) | |

\(\large{ Y_{dry} = \frac{ G_s \; \rho_w }{ 1 \;+\; e } }\) | |

\(\large{ Y_{dry} = \frac{ G_s }{ 1 \;+\; w \; G_s } \; \rho_w }\) | |

\(\large{ Y_{dry} = \frac{ G_s \; \left( 1 \;-\; A \right) }{ 1 \;+\; w \; G_s } \; \rho_w }\) |

### Where:

\(\large{ Y_{dry} }\) = dry bulk density of soil

\(\large{ A }\) = air content

\(\large{ \rho_w }\) (Greek symbol rho) = density of water

\(\large{ M_s }\) = mass of soil

\(\large{ G_s }\) = specific gravity of soil

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

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

\(\large{ w }\) = water content

Tags: Equations for Density Equations for Soil Equations for Geotechnical