FRIEDEWALD Formula to calculate LDL-Cholesterol,        valid only while TGl ≤ 4.6 mmol/l (407 mg/dl) MM Cholest = 38.66 MM TGL        = 88.5 TC - HDL - (TGL /2.2) LDL mmol/l TC - HDL - (TGL /5.0) LDL mg/dl Use "." as decimal separator. The one of the four variables you want to calculate must be void or zero. Click accurate button to calculate mmol/l or mg/dl units.