Body shape index calculator
Calculate ABSI from waist circumference, weight, and height.
What this calculator covers
Use this body shape index calculator to turn waist circumference, weight, and height into an ABSI value.
The explanation keeps the BMI step and the final ABSI scaling visible so the 0.07-ish reference context is easier to interpret.
Frequently asked questions
- What does ABSI measure that BMI does not?
- ABSI (A Body Shape Index) isolates waist size relative to what would be expected given a person's height and overall BMI. Two people with the same BMI can have very different waist sizes; ABSI captures that difference where BMI alone cannot.
- What is a typical ABSI value?
- Published research on adult populations places typical values in roughly the 0.07 to 0.08 range, though the distribution varies by sex, age, and population studied. The calculator labels where your result falls relative to that commonly cited band as a rough orientation point.
- Is a higher ABSI value worse?
- Higher ABSI generally corresponds to more abdominal fat relative to overall body size, which research has associated with elevated health risk. However, ABSI is a research metric and should not be used for clinical diagnosis or risk scoring outside of a medical context.
- Why does the formula compute BMI as an intermediate step?
- ABSI is defined as waist circumference divided by (BMI raised to the 2/3 power times the square root of height). BMI serves as the size-normalization factor in the denominator, so the calculator must compute it before solving for ABSI.
Tool
Run the calculation
Result
RESULT · ABSI
â„–222
Primary result
0.07619 ABSI
With a waist of 85.0 cm, weight of 75.0 kg, and height of 175.0 cm, the ABSI comes out to 0.07619 and sits around the often-cited ~0.07 to 0.08 reference band.
- Unit system
- Metric
- BMI used
- 24.49
- ABSI
- 0.07619
- Interpretation
- Around the often-cited ~0.07 to 0.08 reference band
- Reference note
- Often-cited adult male values cluster around the 0.07 to 0.08 band.
Step-by-step solution
- 1.Convert waist and height to meters: 0.8500 m waist and 1.7500 m height.
- 2.Compute BMI first: 75 / 1.7500² = 24.49.
- 3.Apply ABSI = waist_m / (BMI^(2/3) × height_m^(1/2)) to get 0.07619.
Walkthrough
Visual walkthrough
ABSI combines waist size, height, and BMI into a single waist-shape metric instead of using BMI alone.
01
Convert the body measures to meters
0.8500 m waist · 1.7500 m height
The ABSI formula uses waist and height in meters before the scaling exponents are applied.
02
Compute BMI first
75 / 1.7500² = 24.49
BMI is part of the denominator, so waist size is normalized against overall body size first.
03
Read the ABSI value
The result is usually a small decimal; many adult reference values land in the 0.07-something range.
0.07619