About the VLDL calculator
Very-low-density lipoprotein (VLDL) is the particle your liver uses to ship newly made triglycerides into the bloodstream. Standard lipid panels rarely measure VLDL cholesterol directly; instead, it is estimated from the triglyceride value using a fixed ratio. This calculator applies that standard estimate — VLDL (mg/dL) = Triglycerides / 5 — and shows how it feeds into the calculated LDL cholesterol most panels also report.
The formula behind the estimate
The VLDL/5 relationship comes from the Friedewald equation, published in 1972, which is also used to back out LDL cholesterol without measuring it directly:
- VLDL (mg/dL) = Triglycerides (mg/dL) / 5 — the core estimate this calculator produces.
- LDL (mg/dL) = Total cholesterol - HDL - VLDL — the same equation most "calculated LDL" results on a lab report come from.
- Non-HDL cholesterol = Total cholesterol - HDL — a simple sum of everything that is not HDL, including VLDL and LDL.
The divide-by-5 factor assumes triglycerides are carried mostly by VLDL particles in a roughly fixed cholesterol-to-triglyceride ratio. That assumption holds reasonably well at typical triglyceride levels but breaks down as triglycerides climb, which is why the equation is considered unreliable above 400 mg/dL.
Why a fasting sample matters
Triglycerides rise sharply for several hours after eating, so a non-fasting draw can inflate the triglyceride number and, with it, the calculated VLDL and LDL. The original Friedewald validation used fasting samples (typically 9-12 hours without food), and most labs still ask for a fasting lipid panel for this reason. Enter your sample type above so the interpretation can flag results that need a fasting recheck.
Putting the result in context
A commonly cited reference range for VLDL cholesterol is about 2 to 30 mg/dL. Because VLDL here is simply triglycerides divided by 5, that range is another way of saying "triglycerides under about 150 mg/dL." Values above roughly 30-40 mg/dL usually mean triglycerides are elevated, which is worth discussing alongside the rest of the lipid panel rather than in isolation.
When to consult a professional
This calculator performs the standard arithmetic used on lab reports; it does not diagnose a lipid disorder or recommend treatment. Elevated triglycerides and VLDL can reflect diet, alcohol intake, uncontrolled diabetes, certain medications, or genetic lipid disorders. Discuss any result outside the expected range, and any decision about testing or treatment, with a healthcare provider who has your full history.