# Translations:Dictionary:Gardner’s equation/3/en

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where ${\displaystyle \rho }$ is bulk density given in g/cm3, ${\displaystyle V_{p}}$ is P-wave velocity given in ft/s, and ${\displaystyle \alpha }$ and ${\displaystyle \beta }$ are empirically derived constants that depend on the geology. Gardner et al. proposed that one can obtain a good fit by taking ${\displaystyle \alpha =0.23}$ and ${\displaystyle \beta =0.25}$.[1] Assuming this, the equation is reduced to: