Winters's formula

Winters's formula,^[1] named after R. W. Winters,^[2] is a formula used to evaluate respiratory compensation when analyzing acid-base disorders in the presence of metabolic acidosis.^[3][4] It can be given as:

${\displaystyle P_{CO_{2}}=(1.5\times HCO_{\operatorname {sgn} })+8\pm 2}$,

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