Track A Body Shape Index beyond simple measurements. Analyze waist distribution risk using advanced evidence-based calculations precisely. Visualize z-scores, percentiles, and interpretation hints for individuals instantly. Export results as CSV files or printable PDF summaries. Enhance decision making for clinicians, researchers, and proactive users.
Enter your details and calculate to view ABSI, percentile, and risk insights.
Add current result as a row, attach optional notes, then export as CSV or PDF. Table content auto-saves locally for your next visit.
| # | Height (cm) | Weight (kg) | Waist (cm) | ABSI | Percentile | Risk | Reference Set | Note |
|---|---|---|---|---|---|---|---|---|
| 1 | 170 | 70 | 80 | 0.079500 | 48.0% | Average mortality risk | General adult reference | Baseline example |
| 2 | 165 | 85 | 100 | 0.089000 | 90.5% | Very high mortality risk | General adult reference | High central adiposity |
| 3 | 180 | 78 | 85 | 0.081000 | 55.2% | Average mortality risk | General adult reference | Athletic build |
Tip: Compare profiles across visits to visualize central obesity trends.
A Body Shape Index integrates waist size with BMI and height.
Step 1: BMI = weight (kg) / height (m)2.
Step 2: Convert waist to meters for consistent scaling.
Step 3: ABSI = waist / (BMI^(2/3) * height^(1/2))
Step 4: Z-score = (ABSI − mean) / SD; convert to percentile.
Reference constants here are examples; adapt for validated populations when required.
Select the unit system matching your measurements.
Enter height, weight, waist, and optional age and sex.
Choose a reference dataset or define custom mean and SD.
Calculate to view ABSI, percentile, and risk category instantly.
Save multiple profiles, add notes, and export datasets securely when needed.
BMI reflects total body mass but ignores fat distribution. ABSI highlights waist-related risk even when BMI appears normal, improving identification of individuals with elevated cardiometabolic and mortality risk due to central adiposity concentration.
Measure height without footwear, weight on calibrated scales, and waist midway between lowest rib and iliac crest. Use consistent units and repeat measurements when possible to reduce variability and improve reliability of ABSI-based risk interpretation.
ABSI supports stratifying abdominal obesity risk in clinics, wellness programs, and large cohorts. Exported datasets enable longitudinal tracking, outcome correlation, and population-specific calibration alongside traditional markers like BMI, waist-hip ratio, blood pressure, and lipid profiles.
Percentiles below 25% often indicate relatively lower central adiposity burden.
Percentiles between 25% and 75% align with typical population risk.
Values above 90% may highlight substantially increased cardiometabolic and mortality risk.
ABSI evaluates waist size relative to height and BMI, emphasizing central fat distribution. It helps identify risk where BMI alone seems normal but visceral adiposity is disproportionately high.
You may use metric or imperial units. The calculator converts values internally to consistent metric units, ensuring accurate ABSI, z-score, and percentile results for all supported input formats.
Percentiles and risk categories are based on illustrative reference parameters. They provide orientation, not diagnosis. For formal use, calibrate mean and standard deviation against validated, population-specific datasets.
The tool supports risk awareness, counseling, and research discussions. It must complement, never replace, professional medical evaluation, clinical guidelines, diagnostic imaging, or laboratory investigations for cardiometabolic risk.
Measure horizontally at the midpoint between lowest rib and iliac crest, after gentle exhalation. Avoid clothing bulk, keep the tape snug, and record to the nearest millimeter or one decimal inch.
Custom parameters let researchers and advanced users align ABSI z-scores and percentiles with their study population, institutional data, or published region-specific references for more accurate interpretation.
Saved rows remain in the browser using local storage only. No automatic server transmission occurs. For sensitive clinical environments, export anonymized datasets and follow relevant privacy, consent, and governance policies.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.