The LDL calculator estimates the amount of Low-Density Lipoproteins – complex particles that carry lipids in the blood. Their concentration is a very important parameter predicting the arteriosclerotic risk, but its direct measurement is not a part of the diagnostic routine. Instead, the patient’s LDL is calculated and presented as LDL-C. It is universally accepted to use Friedewald equation to do so. Read on if you’re curious how to calculate LDL cholesterol.