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: P CO 2 = ( 1.5 × [ HCO 3 − ] ) + 8 ± 2 {\displaystyle P_{{\ce {CO2}}}=\left(1.5\times \left[{\ce {HCO3^-}}\right]\right)+8\pm 2} , where HCO−3 is given in units of mEq/L and PCO2 will be in units of mmHg.