Winters's formula

Winters's formula, named after R. W. Winters, is a formula used to evaluate respiratory compensation when analyzing acid-base disorders in the presence of metabolic acidosis. It can be given as:

${\displaystyle P_{{\ce {CO2}}}=(1.5\times \left[{\ce {HCO3^-}}\right])+8\pm 2}$,

where HCO₃⁻ is given in units of mEq/L and P_CO2 will be in units of mmHg.