Overweight Calculator · Practical guide
Overweight vs. Obese BMI: What Is the Difference?
Same scale, different risk: the line between overweight and obese is BMI 30.
At a glance
The Difference in One Number
Both terms describe zones on the same BMI scale. Overweight means a BMI of 25.0–29.9; obese means 30.0 or higher. The line matters because health risks — type 2 diabetes, heart disease, sleep apnea — climb steeply once BMI crosses 30.
Interactive tool
Overweight Calculator
Enter your own values, then compare the result with the examples below.
Results
The Full BMI Scale
| BMI | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5–24.9 | Normal weight |
| 25.0–29.9 | Overweight |
| 30.0 and above | Obese |
What the Line Looks Like in Pounds
At 5 ft 7 in, overweight begins at about 160 lbs (BMI 25) and obesity at about 192 lbs (BMI 30). At 5 ft 9 in, those same lines sit near 169 and 203 lbs. The calculator above marks your exact position on the scale and the distance back to the healthy range.
Moving Between Categories
Because the bands are continuous, a modest loss often changes your category. A person who is 5 ft 7 in and 200 lbs (BMI 31.3) crosses from obese to overweight at 192 lbs and reaches the normal band at 159 lbs — about 8 lbs and 41 lbs respectively.
Frequently Asked Questions
Is a BMI of 29 overweight or obese?
Overweight. The obese category begins at exactly 30.0, so 29.9 is the highest BMI still classified as overweight.
Are there sub-classes within obesity?
Clinically, yes: Class I is BMI 30-34.9, Class II is 35-39.9, and Class III is 40 or higher. This calculator uses a single Obese label for all BMIs of 30 and above.
Why does BMI 30 matter so much?
Large population studies show risks of type 2 diabetes, cardiovascular disease, and joint problems rising sharply past BMI 30, which is why it became the clinical cutoff.
Does waist size matter if my BMI is only 27?
Yes. Carrying weight around the midsection raises risk even within the overweight band. A waist above 35 inches for women or 40 for men signals elevated risk regardless of BMI.