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

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where is bulk density given in g/cm^{3}, is P-wave velocity given in ft/s, and and are empirically derived constants that depend on the geology. Gardner et al. proposed that one can obtain a good fit by taking and .^{[1]} Assuming this, the equation is reduced to:

- ↑ Gardner, G.H.F.; Gardner L.W. & Gregory A.R. (1974). "Formation velocity and density -- the diagnostic basics for stratigraphic traps".
*Geophysics***39**: 770–780. doi:10.1190/1.1440465.