How is AIP calculated?

First convert both fasting triglycerides and HDL cholesterol to mmol/L: TG mmol/L = TG mg/dL ÷ 88.57; HDL mmol/L = HDL mg/dL ÷ 38.67. Then compute AIP = log₁₀(TG mmol/L ÷ HDL mmol/L). Example: TG 150 mg/dL (1.69 mmol/L), HDL 50 mg/dL (1.29 mmol/L) → ratio 1.31 → AIP = log₁₀(1.31) = 0.118. You cannot plug mg/dL values directly into the formula—the logarithm requires mmol/L units.

What is a normal or good AIP value?

Per Dobiášová classification: AIP 0.21 indicates high atherogenic risk. Some studies use AIP 0.24 as high risk. Lower AIP values (including negative numbers when TG is low relative to HDL) reflect more favorable lipid profiles.

What does a high AIP mean?

A high AIP (≥ 0.21) indicates elevated atherogenic particle burden—triglyceride-rich lipoproteins relative to protective HDL. This pattern correlates with insulin resistance, metabolic syndrome, small dense LDL particles, and increased coronary artery disease risk in population studies. It is especially common in South Asian populations with normal LDL but unfavorable TG/HDL balance.

How does AIP differ from the triglyceride/HDL ratio?

The TG/HDL ratio is a simple division (TG ÷ HDL in the same units). AIP is the base-10 logarithm of TG/HDL when both are in mmol/L. The log transformation compresses extreme values and improves correlation with LDL particle size and cardiovascular events in research. AIP 0.21 corresponds to TG/HDL (mmol/L) > 1.62.

Can I use mg/dL values for AIP?

You enter values in mg/dL or mmol/L using the unit toggle, but the calculator converts both to mmol/L before computing the logarithm. Using mg/dL directly in log₁₀(TG/HDL) gives an incorrect result because the conversion factors for TG and HDL differ (88.57 vs 38.67). Always ensure mmol/L conversion before applying the AIP formula.

Do I need to fast before measuring AIP?

Yes—a fasting lipid panel (9–12 hours, water only) is recommended for accurate triglycerides, which drive AIP. Non-fasting triglycerides can be 20–30% higher after meals, artificially elevating AIP. HDL is less affected by fasting, but standard practice uses a fasting sample for the full lipid profile.

How does AIP relate to insulin resistance?

Elevated AIP (≥ 0.21 in men, ≥ 0.18 in some studies for women) correlates with insulin resistance, HOMA-IR, and atherogenic dyslipidemia. AIP reflects the same metabolic pattern as the TG/HDL ratio but with improved statistical properties in cardiovascular research. Use our Insulin Resistance (HOMA-IR) Calculator for direct insulin-based assessment.

What are normal triglyceride and HDL levels for AIP?

Per AHA/ACC guidelines: Triglycerides—optimal < 150 mg/dL (< 1.7 mmol/L), borderline 150–199, high 200–499, very high ≥ 500 mg/dL. HDL (higher is better)—optimal ≥ 60 mg/dL; borderline 40–59 mg/dL men / 50–59 women; low < 40 men / < 50 women mg/dL. AIP combines both markers into a single atherogenic index.

Is AIP better than LDL cholesterol for risk prediction?

AIP and LDL measure different aspects of lipid risk. LDL reflects cholesterol in atherogenic particles; AIP reflects the triglyceride/HDL balance linked to small dense LDL and insulin resistance. Some people have normal LDL but elevated AIP—the classic South Asian lipid pattern. Use AIP alongside LDL, non-HDL, and our Cholesterol Level Interpreter for comprehensive assessment.

How can I lower my AIP?

Evidence-based strategies: (1) Reduce refined carbs, sugar, and alcohol—lowers triglycerides fastest; (2) Lose 5–10% body weight if overweight; (3) Exercise 150–300 min/week—aerobic activity raises HDL and lowers TG; (4) Eat fatty fish or omega-3 supplements (2–4 g/day EPA/DHA for high TG); (5) Increase soluble fiber (oats, dal, psyllium); (6) Quit smoking—raises HDL within weeks. Recheck fasting lipids in 8–12 weeks.

Does sex affect AIP interpretation?

The AIP formula is identical for men and women, but HDL reference ranges differ (< 40 mg/dL low for men, < 50 for women). Women typically have higher HDL and lower AIP values. Insulin resistance thresholds may differ slightly by sex. Always interpret AIP in clinical context with waist circumference, glucose, and blood pressure.

What is the South Asian lipid pattern and AIP?

South Asians often show high triglycerides, low HDL, normal or mildly elevated LDL, and elevated AIP—even at normal BMI. This atherogenic dyslipidemia drives high cardiovascular disease rates in India despite lower average LDL. AIP is especially valuable for detecting hidden metabolic risk in this population.

When should I see a doctor about my AIP?

See your doctor if AIP ≥ 0.21, triglycerides ≥ 200 mg/dL, HDL below sex-specific thresholds, or you have diabetes, hypertension, obesity, or family history of early heart disease. Seek urgent care if triglycerides exceed 500 mg/dL (pancreatitis risk). Do not start or stop lipid medications based solely on calculator results.

Yes. When triglycerides are low relative to HDL (TG/HDL ratio in mmol/L < 1.0), log₁₀ of that ratio is negative. For example, TG 90 mg/dL and HDL 62 mg/dL gives ratio 0.64 mmol/L and AIP ≈ −0.196—indicating very low atherogenic risk. Negative AIP values are clinically favorable.

How does AIP compare to non-HDL cholesterol?

Non-HDL cholesterol (Total − HDL) captures all atherogenic cholesterol particles and is an AHA/ACC treatment target. AIP captures the triglyceride/HDL balance linked to particle size and insulin resistance. High AIP often coincides with elevated non-HDL when VLDL triglyceride particles are elevated. Use both for comprehensive lipid risk assessment.

Does this calculator diagnose heart disease?

No. This tool provides an educational estimate from triglyceride and HDL values using published AIP thresholds. Diagnosis requires clinical correlation, full lipid panel, fasting glucose, HbA1c, blood pressure, and evaluation by a qualified physician. If you have chest pain, stroke symptoms, or severe abdominal pain with very high triglycerides, seek emergency care.

How quickly can lifestyle changes improve AIP?

Triglycerides respond fastest—often dropping 20–30% within 2–4 weeks of strict carb and alcohol reduction, which lowers AIP correspondingly. HDL rises more slowly, typically 5–15% over 8–12 weeks of regular aerobic exercise. Combined lifestyle changes can shift AIP from high (0.25+) to intermediate (0.11–0.21) or low (< 0.11) within 3 months. Recheck fasting lipids at 8–12 weeks.

What advanced tests might my doctor order for high AIP?

If AIP ≥ 0.21 persists despite lifestyle changes: fasting glucose, HbA1c, and HOMA-IR for insulin resistance; ApoB or LDL particle number for atherogenic particle burden; lipoprotein(a) if family history of early heart disease; liver ultrasound for fatty liver; TSH for hypothyroidism; and coronary artery calcium score in selected high-risk adults.

Can medications affect my AIP?

Yes. Statins lower LDL and modestly lower TG while slightly raising HDL—often improving AIP. Fibrates and high-dose omega-3 lower triglycerides significantly, lowering AIP. Beta-blockers, thiazide diuretics, and some HIV/antipsychotic drugs can worsen lipid profiles and raise AIP. Estrogen therapy raises HDL and may lower AIP. Always interpret lab values in context of current medications with your physician.

Atherogenic Index of Plasma (AIP) Calculator

Q: What is the Atherogenic Index of Plasma (AIP)?

The Atherogenic Index of Plasma (AIP) is a logarithmic lipid index: AIP = log₁₀(Triglycerides mmol/L ÷ HDL mmol/L). Developed by Dobiášová and Frohlich, it quantifies the balance between triglyceride-rich atherogenic lipoproteins and protective HDL cholesterol. AIP is widely used in cardiovascular research and clinical lipidology as a marker of atherogenic dyslipidemia and coronary artery disease risk.

Q: Is AIP better than LDL cholesterol for risk prediction?

AIP and LDL measure different aspects of lipid risk. LDL reflects cholesterol in atherogenic particles; AIP reflects the triglyceride/HDL balance linked to small dense LDL and insulin resistance. Some people have normal LDL but elevated AIP—the classic South Asian lipid pattern. Use AIP alongside LDL, non-HDL, and our Cholesterol Level Interpreter for comprehensive assessment.

Calculate the Atherogenic Index of Plasma (AIP) from fasting triglycerides and HDL cholesterol. Enter mg/dL or mmol/L for log-based atherogenic risk, insulin resistance screening, and exportable results.

Enter your details — results appear below after you calculate.

Lipid values

Lipid units

Sex (for HDL reference & IR threshold)

Fasting triglycerides (mg/dL)

Desirable: < 150 mg/dL (< 1.7 mmol/L) after 9–12 h fast

HDL cholesterol (mg/dL)

Protective: ≥ 60 mg/dL; low HDL: < 40 mg/dL (men)

How this Atherogenic Index of Plasma (AIP) calculator works

This tool computes the Atherogenic Index of Plasma (AIP): log₁₀(Triglycerides mmol/L ÷ HDL mmol/L). Developed by Dobiášová and Frohlich, AIP quantifies atherogenic dyslipidemia on a log scale. AIP < 0.11 is low risk; 0.11–0.21 is intermediate; 0.21–0.34 is high; above 0.34 is very high atherogenic risk.

Enter fasting triglycerides and HDL cholesterol in mg/dL or mmol/L exactly as shown on your lipid panel (9–12 hour fast recommended). Select sex for HDL reference ranges and insulin resistance thresholds. The calculator converts both lipids to mmol/L before applying the logarithm—mg/dL values cannot be used directly in the AIP formula.

Results include AIP value, TG/HDL ratio (mmol/L), Dobiášová risk category, individual triglyceride and HDL AHA/ACC status, insulin resistance flag, health score, risk level, clinical interpretation, lifestyle recommendations, and PDF export. Pair with our Triglyceride/HDL Ratio, Cholesterol Level Interpreter, Metabolic Syndrome Risk, and Insulin Resistance (HOMA-IR) calculators for a complete lipid and metabolic picture.

This is an educational screening tool—not a diagnosis. Use fasting labs only. Seek urgent care if triglycerides exceed 500 mg/dL (pancreatitis risk). Never start or stop lipid medications based solely on calculator results. Scroll below for reference tables, worked examples screening guidance, and FAQs.

Atherogenic Index of Plasma (AIP) Calculator – Log-Based Lipid Risk

Millions search "AIP calculator", "atherogenic index of plasma", and "AIP normal range India" each year. The Atherogenic Index of Plasma (AIP) is a logarithmic lipid index developed by Dobiášová and Frohlich: AIP = log₁₀(Triglycerides mmol/L ÷ HDL mmol/L). It quantifies the balance between triglyceride-rich atherogenic lipoproteins and protective HDL cholesterol—capturing atherogenic dyslipidemia in a single number that correlates with LDL particle size, insulin resistance, and cardiovascular disease in clinical research. Our free calculator accepts mg/dL or mmol/L, converts to mmol/L internally, and returns AIP category, TG/HDL ratio, individual lipid status, insulin resistance screening, clinical interpretation, and exportable results.

Pair results with our Triglyceride/HDL Ratio Calculator, Cholesterol Level Interpreter, Metabolic Syndrome Risk Calculator, and Insulin Resistance (HOMA-IR) Calculator for a complete picture of how your lipids affect heart health, diabetes risk, and long-term wellness.

Why Calculate AIP?

The simple TG/HDL ratio predicts cardiovascular risk, but AIP's logarithmic transformation improves correlation with small dense LDL particles and coronary events in epidemiologic studies. AIP compresses extreme ratios and provides a standardized scale: values below 0.11 indicate low atherogenic risk; 0.11–0.21 is intermediate; above 0.21 signals high atherogenic particle burden. This is especially valuable for South Asians with normal LDL but elevated metabolic risk—the "South Asian lipid phenotype" of high TG, low HDL, and hidden atherosclerosis.

1What You Enter

Laboratory Values

Fasting triglycerides — mg/dL or mmol/L
HDL cholesterol — mg/dL or mmol/L
AIP (computed automatically after mmol/L conversion)
Unit toggle — same system for both lipids

Personal Factors

Sex — male or female (HDL cutoff & IR threshold differ)
Fasting status — 9–12 hours recommended for TG
Pair with LDL, glucose, waist for full picture

Example (High risk — man, 48)

TG 220 mg/dL (2.48 mmol/L), HDL 38 mg/dL (0.98 mmol/L) → TG/HDL = 2.53 → AIP = log₁₀(2.53) = 0.403 — very high atherogenic risk. High triglycerides, low HDL, insulin resistance flag. Urgent lifestyle and medical review advised.

Example (Optimal — woman, 32)

TG 90 mg/dL (1.02 mmol/L), HDL 62 mg/dL (1.60 mmol/L) → TG/HDL = 0.64 → AIP = log₁₀(0.64) = −0.196 — low atherogenic risk. Both lipids favorable. Continue heart-healthy habits and routine screening.

2How AIP Is Calculated

Formula

AIP = log₁₀(Triglycerides mmol/L ÷ HDL mmol/L)

Both values must be converted to mmol/L before applying the logarithm. mg/dL values cannot be plugged directly—the conversion factors differ (88.57 for TG vs 38.67 for HDL).

Unit conversions used

Triglycerides mmol/L = mg/dL ÷ 88.57
HDL mmol/L = mg/dL ÷ 38.67

Dobiášová risk thresholds

Low risk: AIP < 0.11
Intermediate: AIP 0.11–0.21
High: AIP 0.21–0.34
Very high: AIP > 0.34

AIP Risk Categories

Category	AIP	Risk profile	Typical action
Low	< 0.11	Low atherogenic particle burden	Maintain healthy lifestyle
Intermediate	0.11–0.21	Moderate cardiometabolic risk	Diet, exercise, weight optimization
High	0.21–0.34	Elevated CVD & IR risk	Medical review, lifestyle intervention
Very high	> 0.34	Strong atherogenic dyslipidemia	Prompt evaluation, possible pharmacotherapy

AIP vs TG/HDL Ratio vs Non-HDL

Index	Formula	Best for
AIP	log₁₀(TG mmol/L ÷ HDL mmol/L)	LDL particle size, atherogenic dyslipidemia research
TG/HDL ratio	TG ÷ HDL (same units)	Simple insulin resistance & CVD screening
Non-HDL cholesterol	Total cholesterol − HDL	AHA/ACC treatment target, all atherogenic particles

How to Lower AIP

Diet

Reduce refined carbs, white rice, maida, sweets
Limit alcohol—major TG driver
Add omega-3 (fatty fish, supplements)
Increase soluble fiber (oats, dal, psyllium)

Lifestyle & activity

150–300 min/week aerobic + resistance training
Target 5–10% weight loss if overweight
Quit smoking—raises HDL within weeks
Recheck fasting lipids in 8–12 weeks

Common Mistakes When Using AIP

1. Using mg/dL directly in the log formula

AIP requires mmol/L conversion first. log₁₀(TG mg/dL ÷ HDL mg/dL) gives an incorrect result because TG and HDL have different conversion factors.

2. Non-fasting triglycerides

Post-meal triglycerides can be 20–30% higher, artificially elevating AIP. Always use a 9–12 hour fasting lipid panel.

3. Confusing AIP with TG/HDL ratio or non-HDL:HDL

AIP is log₁₀(TG/HDL in mmol/L)—not the simple TG/HDL ratio and not non-HDL divided by HDL. Each index measures different aspects of lipid risk.

Frequently Asked Questions (FAQs)

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Atherogenic Index of Plasma (AIP) Calculator

Lipid values

How this Atherogenic Index of Plasma (AIP) calculator works

Atherogenic Index of Plasma (AIP) Calculator – Log-Based Lipid Risk

Why Calculate AIP?

1What You Enter

Laboratory Values

Personal Factors

Example (High risk — man, 48)

Example (Optimal — woman, 32)

2How AIP Is Calculated

Formula

Unit conversions used

Dobiášová risk thresholds

AIP Risk Categories

AIP vs TG/HDL Ratio vs Non-HDL

How to Lower AIP

Diet

Lifestyle & activity

Common Mistakes When Using AIP

1. Using mg/dL directly in the log formula

2. Non-fasting triglycerides

3. Confusing AIP with TG/HDL ratio or non-HDL:HDL

Frequently Asked Questions (FAQs)

What is the Atherogenic Index of Plasma (AIP)?

How is AIP calculated?

What is a normal or good AIP value?

What does a high AIP mean?

How does AIP differ from the triglyceride/HDL ratio?

Can I use mg/dL values for AIP?

Do I need to fast before measuring AIP?

How does AIP relate to insulin resistance?

What are normal triglyceride and HDL levels for AIP?

Is AIP better than LDL cholesterol for risk prediction?

How can I lower my AIP?

Does sex affect AIP interpretation?

What is the South Asian lipid pattern and AIP?

When should I see a doctor about my AIP?

Can AIP be negative?

How does AIP compare to non-HDL cholesterol?

Does this calculator diagnose heart disease?

How quickly can lifestyle changes improve AIP?

What advanced tests might my doctor order for high AIP?

Can medications affect my AIP?

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Insulin Resistance (HOMA-IR) Calculator

Type 2 Diabetes Risk Assessment Calculator

Cholesterol Level Interpreter & Heart Risk Calculator

Triglyceride/HDL Ratio Calculator

LDL Cholesterol Calculator (Friedewald)

Non-HDL Cholesterol Calculator

ApoB Heart Risk Calculator

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