Calculator inputs
Large screens show three columns, smaller screens collapse to two and one.
Formula used
The calculator focuses on the Atherogenic Index of Plasma and also derives related lipid ratios when optional fields are supplied.
AIP = log10[(Triglycerides in mmol/L) / (HDL-C in mmol/L)]
Non-HDL-C = Total Cholesterol − HDL-C
CRI-I = Total Cholesterol / HDL-C
CRI-II = LDL-C / HDL-C
AC = (Total Cholesterol − HDL-C) / HDL-C
If you enter mg/dL, the script converts triglycerides and HDL-C to mmol/L before calculating AIP. It then places the AIP result into a common low, intermediate, or high band.
How to use this calculator
Choose your unit system first. Enter triglycerides and HDL cholesterol, because those two values are required for AIP.
Add total cholesterol if you want non-HDL-C, atherogenic coefficient, and Castelli Risk Index I. Add LDL cholesterol if you want Castelli Risk Index II.
Press Calculate. The result will appear below the header and above the form, along with a risk band, summary table, and Plotly charts. Use the export buttons to save your result as CSV or PDF.
For the most meaningful interpretation, use accurate laboratory values and review the result with a qualified clinician, especially if you already have cardiovascular risk factors or treatment plans.
Example data table
Example values below use mg/dL inputs and standard AIP conversion.
| Profile | Total Cholesterol | LDL-C | HDL-C | Triglycerides | AIP | Band |
|---|---|---|---|---|---|---|
| Case A | 180.00 mg/dL | 100.00 mg/dL | 55.00 mg/dL | 120.00 mg/dL | -0.021 | Low |
| Case B | 210.00 mg/dL | 135.00 mg/dL | 45.00 mg/dL | 160.00 mg/dL | 0.191 | Intermediate |
| Case C | 240.00 mg/dL | 155.00 mg/dL | 38.00 mg/dL | 220.00 mg/dL | 0.403 | High |
| Case D | 170.00 mg/dL | 88.00 mg/dL | 65.00 mg/dL | 95.00 mg/dL | -0.195 | Low |
Important note
This tool is for education and quick screening support. It does not diagnose heart disease, replace clinical guidelines, or substitute for medical advice, examination, or treatment.
FAQs
1) What does AIP measure?
AIP summarizes the balance between triglycerides and HDL cholesterol after logarithmic conversion. It is commonly used as a compact marker related to atherogenic lipid patterns and cardiometabolic risk.
2) Why are triglycerides and HDL-C required?
Those two lab values are the direct ingredients of the AIP formula. Without both inputs, the calculator cannot compute the index or assign the result to a common band.
3) Why can I enter total cholesterol and LDL-C?
They are optional advanced fields. When present, the page also calculates non-HDL cholesterol, Castelli Risk Index I, Castelli Risk Index II, and the atherogenic coefficient.
4) Do mg/dL and mmol/L give the same AIP?
Yes, if the conversion is handled correctly. This page converts mg/dL inputs to mmol/L before computing AIP, so the final index stays consistent across supported unit systems.
5) Is a higher AIP always dangerous?
A higher AIP generally points toward a more atherogenic lipid pattern, but interpretation still depends on the full clinical picture, medicines, medical history, and other cardiovascular risk factors.
6) Can I use non-fasting values?
You can enter them, but triglycerides may change with recent meals. For consistent tracking, compare values collected under similar conditions and follow the testing instructions given by your clinician or lab.
7) What does the Plotly graph show?
The first graph shows your AIP on a gauge with common bands. The second graph displays the submitted lipid profile values so you can visually compare the entered numbers.
8) Are the export buttons saving my whole page?
The CSV and PDF buttons export the current calculation summary, not the full webpage. That keeps the file focused on the numbers and interpretation shown in your result panel.