BMI Goal Weight Calculator
Find your target weight for any BMI goal.
Enter your height to see the exact weight range for underweight, healthy, overweight, and obese BMI thresholds.
If you know your target BMI, you can work backward to calculate the goal weight required to achieve it. This is more goal-oriented than calculating your current BMI — it gives you a concrete weight target to work toward.
Formula: Goal Weight = Target BMI × Height² (in meters)
In imperial units: Goal Weight (lbs) = Target BMI × Height² (in inches) ÷ 703
Standard BMI categories (WHO):
- Underweight: BMI < 18.5
- Normal weight: BMI 18.5–24.9
- Overweight: BMI 25.0–29.9
- Obese Class I: BMI 30.0–34.9
- Obese Class II: BMI 35.0–39.9
- Obese Class III: BMI ≥ 40.0
Worked example: Person is 5'8" (68 inches / 1.727 m) and wants to reach a BMI of 22 (mid-normal range).
Metric: Goal Weight = 22 × 1.727² = 22 × 2.982 = 65.6 kg Imperial: Goal Weight = 22 × 68² ÷ 703 = 22 × 4,624 ÷ 703 = 144.6 lbs
For a range (BMI 18.5 to 24.9):
- Lower bound: 18.5 × 2.982 = 55.2 kg (121.7 lbs)
- Upper bound: 24.9 × 2.982 = 74.3 kg (163.7 lbs)
This person’s healthy weight range is 122–164 lbs.
Important limitations: BMI is a screening tool, not a diagnostic one. It doesn’t account for muscle mass, bone density, body fat distribution, age, or ethnicity. Athletes often have “overweight” BMIs despite excellent health. Always use BMI alongside other metrics (waist circumference, body fat %, blood work) when setting health goals.