Overweight Calculator
Check if you're underweight, healthy weight, overweight, or obese using BMI. Understand your weight category and see how much weight to reach a healthy range.
BMI Categories Explained
| BMI Range | Category | Health Implications |
|---|---|---|
| < 18.5 | Underweight | May indicate malnutrition; increased risk of osteoporosis |
| 18.5 – 24.9 | Healthy Weight | Generally associated with lowest health risks |
| 25.0 – 29.9 | Overweight | Increased risk for cardiovascular disease, type 2 diabetes |
| 30.0 – 34.9 | Obesity Class I | High risk for obesity-related conditions |
| 35.0 – 39.9 | Obesity Class II | Very high risk for health complications |
| ≥ 40 | Obesity Class III | Severe/morbid obesity; highest health risks |
BMI Formula
BMI = 85 ÷ (1.70)² = 85 ÷ 2.89 = 29.4 (Overweight)
Healthy upper weight at BMI 24.9 = 24.9 × 2.89 = 72.0 kg
Weight to lose = 85 − 72 = 13 kg
Frequently Asked Questions
A BMI of 25.0 to 29.9 is classified as overweight according to WHO standards.
BMI has limitations. It doesn't account for muscle mass, bone density, age, or fat distribution. Athletes and elderly individuals may be misclassified.
The healthy BMI range is 18.5 to 24.9. This range is associated with the lowest risk of weight-related health issues for most adults.
If overweight, even modest weight loss (5-10% of body weight) can improve health markers. The calculator shows weight needed to reach BMI 24.9.
Children use BMI-for-age percentiles, not the adult categories. This calculator is for adults 18+ only.