BAI calculator with BMI comparison
This is an interesting real-life application of graphs of functions. For background on this calculator, see New measure of obesity – body adiposity index (BAI).
Enter your age, gender, height, weight, and hip circumference ("at the level of the maximum extension of the buttocks posteriorly in a horizontal plane") below. (Some typical values are given.)
[If you still think in feet, pounds and inches, you can convert your measurements to metric here.]
BMI Result
At 1.75 m tall and 80 kg your BMI is:
BMI = 26.1 kg/m2
| Weight Status | BMI |
|---|---|
| Underweight | Below 18.5 |
| Normal | 18.5 – 24.9 |
| Overweight | 25.0 – 29.9 |
| Obese | 30.0 and Above |
Your BMI weight status:
BAI Result
At 1.75 m tall and hip 100 cm, and being male, your BAI is:
BAI = 25.2% body fat
| Status | BAI Male 20 to 40 |
BAI Female 20 to 40 |
|---|---|---|
| Underweight | < 8% | < 21% |
| Healthy | 8 to 19% | 21 to 33% |
| Overweight | 19 to 25% | 33 to 39% |
| Obese | > 25% | > 39% |
Your BAI weight status:
Formula for BMI
`\text{BMI}` `=\frac{\text{weight in kg}}{\text{(height in m)}^2}`
Formula for BAI
`\text{BAI}` `=\frac{\text{hip in cm}}{\text{(height in m)}^{1.5}}` `-18`
Points to Note and Disclaimer
The above cut-off values for the BAI (% body fat) are based on this table.
Determining your body fat from height, weight and hip measurements (and your health status) is certainly not an exact science! Go to your doctor and get proper body fat measurements done before acting on anything above.
Graphs of BMI and BAI
The following graph shows the BMI for various weights (40 kg in green, 60 kg in blue, 80 kg in red and 100 kg in magenta).
I'm sorry, Dave. I'm afraid I can't do that.
Something messed up. :-(