BMI calculator
Enter your height and weight; the calculator returns your BMI and its CDC category. The reason BMI appears all over GLP-1 conversations: the Wegovy and Zepbound labels describe use from BMI 30, or from 27 with a weight-related condition. That is a label fact, not an eligibility verdict — the decision belongs to a prescriber.
Calculator
The categories
| BMI | CDC category |
|---|---|
| below 18.5 | Underweight |
| 18.5 – 24.9 | Normal range |
| 25 – 29.9 | Overweight |
| 30 – 34.9 | Obesity, class 1 |
| 35 – 39.9 | Obesity, class 2 |
| 40+ | Obesity, class 3 |
The GLP-1 label thresholds
The Wegovy and Zepbound labels describe use in adults with BMI ≥ 30, or BMI ≥ 27 with at least one weight-related condition (for example hypertension, type 2 diabetes or dyslipidaemia). Insurers and telehealth providers commonly use those same thresholds. Meeting a number on this page is not a prescription — it is one input to a conversation with a prescriber.
What BMI can't tell you
BMI is weight scaled for height, nothing more. It cannot distinguish muscle from fat, it misreads very muscular and very lean-mass-depleted bodies in opposite directions, and it says nothing about where fat sits, which matters metabolically. It persists because it is a fast, free screening number — useful for population thresholds, weak as a personal verdict.
Track the numbers that move
Bo tracks your weight trend, your weight-loss percentage and your goal progress next to your doses — the numbers that actually change week to week.
Educational information only. Bo is a tracking app, not a medical device, and nothing here is medical advice, a dosing recommendation, or a substitute for your prescriber. Half-lives are population averages from the sources cited on each row; individual clearance varies with body weight, kidney and liver function, and other medication.