At a Glance
VLDL (very-low-density lipoprotein) is a particle made by your liver that carries mostly triglycerides through the blood. VLDL cholesterol, or VLDL-C, is the cholesterol carried inside those particles.
"Cal" on your lab report means calculated. Your VLDL-C was not measured in a laboratory instrument. It was worked out by arithmetic from other numbers on the same report.
Which arithmetic depends on your laboratory, and this matters more than it sounds. LOINC 13458-5, the code that identifies this result, names two routes:
- Friedewald route — VLDL-C ≈ triglycerides ÷ 5
- Residual route — VLDL-C = total cholesterol − HDL-C − LDL-C
Which one produced your number follows from how your laboratory calculated LDL-C. Labcorp's panel reports LDL Chol Calc (NIH), so a Labcorp VLDL line is not a simple ÷ 5 estimate.
Where the divisor of 5 is used, it is an average rather than a fact about you. The Martin-Hopkins method, developed from triglyceride-to-VLDL-C ratios in more than 1.3 million people and described by Quest Diagnostics, replaces the fixed 5 with a table factor ranging from 3.1 to 11.9, set by the person's triglyceride and non-HDL cholesterol levels. One divisor cannot be right for everyone.
Above 400 mg/dL of triglycerides, the ÷ 5 estimate is not considered accurate. MedlinePlus and Testing.com both say so. The rule for LDL-C is different — Labcorp reports its calculated LDL-C up to 800 mg/dL — so the two lines on one panel carry two different limits.
Published reference ranges for VLDL disagree, and this page's band is one of the higher ones. The band plotted on this page is 5 - 40 mg/dL, the interval Labcorp prints beside VLDL Cholesterol Cal on its lipid panel. MedlinePlus publishes 2 to 30 mg/dL. Cleveland Clinic publishes below 30 mg/dL. The sources disagree at both ends — this page's band starts higher and ends higher — so a result of 3 is flagged Low here and sits inside MedlinePlus's interval, and a result of 35 is flagged Normal here and sits above theirs. The disagreement is real, it is not a typo, and the sections below say where each figure comes from rather than pretending it away.
Reference intervals differ between laboratories and methods, and a single value is interpreted alongside the rest of your lipid panel and your clinical history.
How to read your result
| Your VLDL-C | If the ÷ 5 method was used, roughly what triglycerides | What it means |
|---|---|---|
| Below 5 mg/dL | Below about 25 mg/dL | Below the band plotted on this page, so your graph flags it Low. MedlinePlus's published interval starts at 2 mg/dL, so a result of 2 to 4 is flagged here and inside theirs. Low VLDL is not a target anyone treats toward, but a persistent value here is worth reading alongside the rest of your lipid panel — see the low-result section. |
| 5 - 29 mg/dL | About 25 - 145 mg/dL | Inside every published range, including the narrowest. No interpretive tension. |
| 30 - 40 mg/dL | About 150 - 200 mg/dL | The disputed band. Inside this page's plotted range, and at or above the level MedlinePlus and Cleveland Clinic call elevated. On the ÷ 5 method this is triglycerides of roughly 150 to 200 mg/dL: NCEP ATP III classes 150 - 199 borderline high and 200 high, so this band straddles a threshold rather than sitting inside one. Read this as borderline rather than as either "normal" or "high". |
| 41 - 79 mg/dL | About 205 - 395 mg/dL | Above every published range. On the ÷ 5 method this is triglycerides of roughly 205 to 395 mg/dL, which NCEP ATP III classes high. The calculation is still inside the window where it is reported, though a fixed divisor of 5 tends to overstate VLDL-C as triglycerides rise. The triglyceride result is the finding. |
| 80 - 99 mg/dL | About 400 - 500 mg/dL | At or above the point where the ÷ 5 estimate is not considered accurate. The triglyceride result is the finding, and a non-fasting result in this territory is repeated after fasting before conclusions are drawn. |
| 100 mg/dL and above | Above about 500 mg/dL | Triglycerides in this territory carry a risk of acute pancreatitis alongside the cardiovascular concern, and are treated more urgently — NCEP ATP III classes 500 mg/dL and above very high. Contact your clinician rather than waiting for a routine follow-up. Where the ÷ 5 method was used, the VLDL figure is above the point at which that estimate is considered accurate and should not be read as precise. |
Use the triglyceride figure printed on your own report, not the middle column. That column shows how tightly the two lines are coupled if your laboratory used the ÷ 5 method — not a way to work backwards to a number you already have. Under that method the VLDL line adds little your triglycerides did not already carry. Where VLDL-C is instead derived as total cholesterol − HDL-C − LDL-C, the two numbers will not divide neatly by five.
If you remember only one thing
Your VLDL number was calculated, not measured — and how it was calculated depends on your laboratory. Some derive it as triglycerides ÷ 5; others as total cholesterol minus HDL-C minus LDL-C. VLDL-C is related to your triglycerides — VLDL particles are what carry them — but the VLDL figure alone does not tell you whether your triglyceride result is high or low. Under the ÷ 5 route the two are directly linked; under the other route VLDL-C also depends on your total and HDL cholesterol. Read the triglyceride value printed on your report.
Two people, same result
Two people both have a VLDL Cholesterol Cal of 44 mg/dL.
The first has triglycerides of 220 mg/dL, at a laboratory using the fixed divisor: 220 ÷ 5 = 44.
The second has triglycerides of 260 mg/dL, at a laboratory using Martin-Hopkins, which selects the divisor from a table rather than always using 5. At his triglyceride and non-HDL cholesterol levels it is about 6, so his report also prints 44.
Higher triglycerides, same printed number — because the arithmetic behind the two lines is not the same arithmetic, and LOINC 13458-5 names two formulas laboratories choose between. What decides which situation you are in is not on the VLDL line. It is on the triglyceride line, and in the method your laboratory used.
What this result cannot tell you
- How many VLDL particles you have. VLDL-C is the cholesterol carried in those particles, not a count. Particle counts come from NMR tests such as the VLDL-P and VLDL size panels.
- Whether your VLDL is unusually cholesterol-rich or cholesterol-poor. That is the assumption the fixed divisor makes, and the Martin-Hopkins factor range of 3.1 to 11.9 exists because it does not hold across individuals.
- Much that your triglycerides did not already tell you, where the ÷ 5 route was used. Where the laboratory instead derives VLDL-C from total cholesterol, HDL-C and LDL-C, the line carries more than the triglyceride result alone — and cannot be checked against it by dividing by five.
- Whether you have atherosclerosis. No blood lipid value diagnoses arterial disease; imaging and clinical assessment do that.
Common interpretation mistakes
Treating VLDL as a second, confirming result. Where the ÷ 5 route was used, a raised VLDL alongside raised triglycerides is not two findings pointing the same way — it is one finding, printed twice.
Comparing your number to a range found online without checking which range. Published VLDL intervals differ by more than a third at the upper bound. A VLDL of 35 mg/dL is inside this page's plotted range and above the figure Cleveland Clinic and MedlinePlus publish — both true at once.
Assuming a VLDL line will be on every lipid panel. Many print total cholesterol, HDL-C, calculated LDL-C and triglycerides and no VLDL.
Reading a VLDL derived from very high triglycerides as a precise figure. Above 400 mg/dL the estimate is outside its validated range.
Assuming a low VLDL is automatically good news. A low triglyceride result is not in itself a problem — though a persistently very low VLDL has a short list of causes worth ruling out.
Questions your doctor may ask
- Were you fasting, and for how long? Triglycerides respond to recent meals more than any other routine lipid.
- How much alcohol do you drink, and any in the day or two before the draw?
- Are you taking a corticosteroid, beta blocker, estrogen, retinoid or antiretroviral? Several raise triglycerides.
- Do you have diabetes, prediabetes, an underactive thyroid, or a family history of very high triglycerides or pancreatitis?
- What did your previous lipid panels show? The direction of travel is more useful than one value.
Read together with
- Triglycerides — read the two together; the triglyceride value is the finding.
- Non-HDL cholesterol — total cholesterol minus HDL-C. It captures the cholesterol in LDL, VLDL and their remnants in one figure, and is a guideline-recognized treatment target in a way VLDL-C is not.
- LDL-C — the two lines are linked, and which way round depends on the method. Under Friedewald, the triglycerides ÷ 5 step inside the LDL-C calculation is the VLDL-C estimate. Under a newer equation such as the NIH one Labcorp reports, LDL-C is calculated first and VLDL-C is what is left after subtracting it and HDL-C from total cholesterol.
- Apolipoprotein B — one apoB molecule per atherogenic particle, so it counts particles rather than their cholesterol.
- HbA1c or fasting glucose — raised triglycerides and insulin resistance travel together.
Clinical pearls
- The Friedewald equation is where the fixed divisor lives. LDL-C = total cholesterol − HDL-C − (triglycerides ÷ 5). The subtracted term is the VLDL-C estimate, so where Friedewald is used your calculated LDL-C and your VLDL-C are two outputs of one calculation. Laboratories using Martin-Hopkins or the NIH equation carry no fixed ÷ 5 term at all, and LOINC 13458-5 names both routes for this result.
- Martin-Hopkins replaced the constant with a lookup. Its adjustable factor spans 3.1 to 11.9 and was derived from more than 1.3 million people; it is more accurate at high triglycerides and at low LDL-C, particularly below 70 mg/dL.
- 5 - 40 mg/dL is the band plotted on this page and the interval Labcorp prints on its lipid panel; 2 - 30 mg/dL is what MedlinePlus publishes. MedlinePlus notes that ranges vary between laboratories. Why the two cutoffs differ is not something either source explains, so this page states the difference without assigning a reason.
- On the ÷ 5 method, a VLDL-C of 30 mg/dL corresponds to triglycerides of about 150 mg/dL — the point at which NCEP ATP III classes triglycerides borderline high (150 - 199; 200 and above is high).
Clinical Takeaway
VLDL Cholesterol Cal is a calculated value, not a measurement — and which calculation produced it depends on your laboratory. LOINC 13458-5 names two routes: triglycerides divided by five, or total cholesterol minus HDL-C minus LDL-C. Where the ÷ 5 route was used the line adds little beyond the triglyceride result behind it, and above 400 mg/dL of triglycerides it is not considered accurate. Published reference ranges genuinely disagree — this page plots 5 - 40 mg/dL, the interval Labcorp prints on its lipid panel, while MedlinePlus publishes 2 - 30 and Cleveland Clinic below 30 — so a result between 30 and 40 is borderline rather than clearly normal or clearly high, and a result between 2 and 4 is flagged Low here while sitting inside MedlinePlus's interval. The number to act on is the triglyceride figure printed on your own report, which this line tracks but does not replace.
In one sentence
Your VLDL Cholesterol Cal was calculated rather than measured, by one of two formulas depending on your laboratory, and the triglyceride result printed on the same report is the one that carries the meaning.
Bottom line
If your report says VLDL Cholesterol Cal, the "Cal" is telling you the number was calculated rather than measured. Which calculation depends on the laboratory: LOINC 13458-5 names both triglycerides ÷ 5 and total cholesterol − HDL-C − LDL-C, and Labcorp's panel, which prints this label, calculates LDL-C by the NIH equation rather than by Friedewald. Where the fixed divisor is used it is a population average — a method built from more than 1.3 million people replaces it with a factor ranging from about 3.1 to 11.9 depending on the rest of your lipid panel — and above 400 mg/dL of triglycerides the estimate is not considered accurate. Published normal ranges also disagree: this page plots 5 - 40 mg/dL, MedlinePlus publishes 2 - 30 mg/dL, and Cleveland Clinic calls 30 or above elevated, so a value in the thirties sits in genuinely contested territory. Look at the triglycerides line printed on your own report rather than working backwards from this one; that is where any change would have to start.
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Start with my report →Frequently Asked Questions
What is VLDL cholesterol in a blood test?
What does "Cal" mean in VLDL Cholesterol Cal?
What is a normal VLDL cholesterol range?
Why do lab reports show 5-40 mg/dL when other sites say 30?
How is VLDL cholesterol calculated?
Why doesn't my VLDL equal my triglycerides divided by 5?
Is the divide-by-5 rule accurate?
When is the VLDL calculation not valid?
What does a VLDL cholesterol of 10, 13, or 24 mean?
What does a VLDL cholesterol of 14 or 15 mean?
What does a VLDL cholesterol of 30 mean?
What does a VLDL cholesterol of 40 mean?
What does a VLDL cholesterol of 42 or 47 mean?
Is high VLDL cholesterol dangerous?
What does it mean if my VLDL is calculated high?
Should I worry about a low VLDL cholesterol?
Why is there no VLDL on my lipid panel?
What is the difference between VLDL and LDL?
How do I lower my VLDL cholesterol?
Is VLDL cholesterol the same as non-HDL cholesterol?
Does VLDL cholesterol need to be measured fasting?
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