How to use this calculator
- Enter the requested measurements or dates.
- Choose the option that best matches your goal or method.
- Click Calculate.
- Review the result card, score, interpretation, and recommendation.
#1419 · Health Tool
Body Mass Index Goal Calculator
Calculate the target body weight required to reach a chosen BMI. This tool shows weight change needed, weekly target, calorie deficit estimate, and goal difficulty.
Calculator
BMI goal inputscm
kg
BMI
weeks
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What the result means
The result is an estimate designed to support practical wellness decisions. Use the score, benchmark, and gap metrics as planning references rather than medical diagnosis.
Target weight = target BMI × height². Weekly change = weight difference ÷ weeks. Daily calorie gap ≈ total kg change × 7,700 ÷ days.
This calculator provides educational wellness estimates only and is not a substitute for professional medical advice, diagnosis, or treatment.
Example calculation
At 170 cm and 80 kg, a target BMI of 23 gives a target weight of about 66.5 kg. Over 24 weeks, that requires about 0.56 kg per week.
Tips for better results
- Use consistent measurements and update results over time.
- Treat the result as a decision-support estimate, not a diagnosis.
- For medical, pregnancy, fertility, or high-intensity training decisions, consult a qualified professional.
FAQ
What BMI should I aim for?
Many adults use the normal BMI range as a reference, but ideal targets vary by person.
How much weight do I need to lose for my target BMI?
The calculator subtracts target BMI weight from current weight to show the required change.
Is BMI a good health indicator?
BMI is useful for screening but does not measure muscle, fat distribution, or health status directly.
How long will it take to reach my BMI goal?
That depends on the selected timeframe and whether the weekly change is sustainable.
Can athletes have a high BMI?
Yes. High muscle mass can raise BMI without the same risk meaning as excess fat.
Related calculators
Result module guide
| Metric | Meaning |
|---|---|
| Main Result | Primary estimate shown in the result card |
| Health Score | 0–100 score for quick interpretation |
| Benchmark | Reference range or category used for interpretation |
| Recommendation | Automatic comment based on the result |
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