GFR is calculated as:
GFR (ml/minute per 1.73 m2) = kxheight/serum creatinine GFR (ml/minute per 1.73 m2) = kxweight/serum creatinine GFR (ml/minute per 1.73 m2) = k/weightxcreatinine GFR (ml/minute per 1.73 m2) = k/heightxcreatinine