Lipids & Cardiovascular Risk Labs
Every lipids & cardiovascular risk labs calculator on CalcEngines — unit converters, derived indices and interpretive tools, each with its formula, a worked example and the reference intervals it is judged against.
30 calculators in this section
- ApoB/ApoA-1 Ratio CalculatorDivide apolipoprotein B by apolipoprotein A-1 for the single most informative number the two tests produce — atherogenic particles against protective ones, on a non-fasting sample, with sex-specific thresholds.
- Apolipoprotein A-1 (ApoA-1) Unit ConverterConvert apolipoprotein A-1 between g/L, mg/dL and mg/L. It is the HDL counterpart of apoB, and it reads the opposite way round: for apoA-1 it is a low result, not a high one, that carries the risk.
- Apolipoprotein B (ApoB) Unit ConverterConvert apolipoprotein B between g/L, mg/dL and mg/L — and read the answer against the right number, because the apoB target and the apoB reference interval are nowhere near each other.
- Atherogenic Index of Plasma (AIP) CalculatorAIP is log₁₀ of triglycerides divided by HDL cholesterol, with both in mmol/L. Enter mg/dL instead and every answer is 0.36 too high — more than three times the width of the whole intermediate band.
- Cholestanol Unit ConverterConvert plasma cholestanol between mg/L, µg/mL, mg/dL and µmol/L. It is cholesterol with one double bond saturated, so its mass is cholesterol's plus two hydrogens — and it is the marker for a treatable disease that is usually diagnosed late.
- Cholesterol Unit ConverterConvert total, LDL and HDL cholesterol between mg/dL, mg/L, g/L and mmol/L — and see why the triglyceride on the same report needs a different factor entirely.
- Dutch Lipid Clinic Network FH Score CalculatorScore the Dutch Lipid Clinic Network criteria for familial hypercholesterolaemia: family history, personal history, examination, untreated LDL cholesterol and a DNA finding, with only the highest item in each group counting. The total sorts the diagnosis into definite, probable, possible or unlikely — and the sources do not agree about what a total of exactly 8 means, so this page tells you both.
- HDL Cholesterol Unit ConverterConvert HDL cholesterol between mg/dL, mmol/L, mg/L and g/L using exactly the same factor as LDL and total cholesterol, because it is exactly the same molecule. Then read the answer against a threshold rather than a target: HDL-C is an input to risk estimation and is not something any guideline asks you to treat.
- hs-CRP Unit ConverterConvert high-sensitivity CRP between mg/L, mg/dL, µg/mL and ng/mL — and see the fact that makes this a separate page from the ordinary CRP converter: hs-CRP is the same molecule, and the whole cardiovascular risk banding at 1 and 3 mg/L sits inside what a standard CRP assay reports as normal.
- Hypertriglyceridaemia Severity InterpreterGrade a triglyceride result as mild, moderate, severe or very severe on the Endocrine Society classification, in mg/dL or mmol/L, and see which bands matter for cardiovascular risk and which one is about pancreatitis. Where other guidelines draw the pancreatitis line somewhere else, the page says so.
- LDL Cholesterol Calculator (Friedewald)Estimate LDL cholesterol from total cholesterol, HDL and triglycerides using the Friedewald equation — and see the four situations in which the estimate should not be reported.
- LDL Cholesterol Calculator (Sampson-NIH)Estimate LDL cholesterol with the NIH equation 2 of Sampson and colleagues — derived against beta-quantification and usable up to a triglyceride of 800 mg/dL, where Friedewald stops at 400.
- LDL Cholesterol Unit ConverterConvert LDL cholesterol between mg/dL, mmol/L, mg/L and g/L — and read the answer against a treatment target rather than a reference interval, because LDL-C does not have one. The target depends on cardiovascular risk, and on most reports the LDL-C itself is a calculated number rather than a measured one.
- LDL Percent Reduction Needed CalculatorWork out the percentage LDL reduction between a current value and a target, and read it against the ACC/AHA statin intensity definitions to see which intensity is the sensible starting point.
- LDL Target by Risk Category InterpreterPick the cardiovascular risk category, enter the current and untreated LDL cholesterol, and see the ESC/EAS goal, whether it is met, and the percentage reduction still needed — including the rule most calculators leave out, that high and very high risk need a 50% fall from baseline as well as the absolute goal. The 2026 ACC/AHA goals are printed alongside.
- LDL to HDL Ratio CalculatorDivide LDL cholesterol by HDL cholesterol for a unit-independent ratio — widely quoted, useful for explanation, and used by no major guideline as a treatment target.
- Lipoprotein(a) Risk InterpreterRead an Lp(a) result in the unit it was reported in — mg/dL or nmol/L — against the thresholds published in that unit. The two units measure different things and do not convert with a fixed factor, and the guidelines themselves pair 50 mg/dL with both 105 and 125 nmol/L. This page shows where they agree and where they do not.
- Lipoprotein(a) Unit ConverterConvert an Lp(a) in nmol/L to an approximate mg/dL — and see how far the answer moves across the range of conversion factors in use, because no exact conversion exists.
- Lp-PLA2 Activity Unit ConverterConvert lipoprotein-associated phospholipase A2 activity between nmol/min/mL, U/L, nkat/L and µkat/L — and see why there is no conversion to the ng/mL of the old mass assay, which is no longer on the market.
- Non-Esterified Fatty Acids Unit ConverterConvert NEFA — free fatty acids — between mmol/L, µmol/L, mg/dL and mg/L, with the oleic-acid convention the molar figure actually rests on, and why mEq/L and mmol/L are the same number here.
- Non-Fasting Lipid Profile InterpreterCheck a routine lipid profile against the 2016 EAS/EFLM joint consensus: whether a non-fasting sample is acceptable, which results cross its desirable-concentration flags, when a repeat fasting sample is worth taking, and which values are extreme enough to refer at once. Several results can be flagged together, and the page counts and lists them all.
- Non-HDL Cholesterol CalculatorSubtract HDL from total cholesterol to get the cholesterol carried in every atherogenic particle — a measure that needs no fasting sample and no assumption about VLDL.
- Remnant Cholesterol CalculatorSubtract HDL and LDL from total cholesterol to get the cholesterol carried in triglyceride-rich lipoproteins and their remnants — free from any standard lipid panel, with thresholds that are conventional rather than guideline-based.
- Sitosterol Unit ConverterConvert plasma sitosterol between mg/L, µg/mL, mg/dL and µmol/L — and notice the unit before the number, because the sterol panel reports mg/L where the rest of the lipid profile reports mg/dL.
- Small Dense LDL Cholesterol Unit ConverterConvert small dense LDL cholesterol between mg/dL, mmol/L, mg/L and g/L. The factor is cholesterol's own 0.02586, the same as on every other cholesterol page — what differs is what the number means.
- Statin Muscle Symptoms CK InterpreterMuscle aches on a statin? Enter the CK and your laboratory's own upper reference limit, say whether there are symptoms, and see what the European Atherosclerosis Society consensus on statin-associated muscle symptoms advises: continue, continue with monitoring, stop and rechallenge, or stop and assess for rhabdomyolysis.
- Total Cholesterol to HDL Ratio CalculatorDivide total cholesterol by HDL cholesterol to get the Framingham risk ratio, read against sex-specific reference points — a risk marker rather than a treatment target.
- Triglyceride to HDL Ratio CalculatorDivide triglycerides by HDL cholesterol in mg/dL as a surrogate for insulin resistance and small dense LDL — and see why the same thresholds cannot be used in mmol/L.
- Triglyceride Unit ConverterConvert triglycerides between mg/dL, mmol/L, g/L and mg/L — and see why the molar value is a nominal unit conversion rather than a true molar concentration.
- VLDL Cholesterol CalculatorEstimate VLDL cholesterol as a fifth of the triglyceride concentration — the same assumption Friedewald rests on, with the same limits.