API gravity

Input(s)

$SG_{o}$: Specific Gravity of Oil Phase (fraction)

Output(s)

API: API Gravity (dimensionless)

Formula(s)

$$ A P I=\frac{141.5}{S G_{o}}-131.5 $$

Notes: $SG_{o}=\frac{\rho_{\text {oil }}}{\rho_{\text {water }}}$ at $60 \mathrm{~F}$.

Reference(s)

Wikipedia.org.