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.