Ideal Weight Calculator — Find Your Healthy Weight Range
Calculate your ideal body weight using multiple scientific formulas including Devine Robinson Miller and Hamwi methods.
Your ideal weight depends on height gender frame size and body composition. Multiple formulas exist because there is no single correct answer. The most commonly used is the Devine formula (used in medicine for drug dosing) but the Robinson and Miller formulas may be more accurate for general health. Rather than targeting a single number aim for the healthy BMI range of 18.5-24.9 for your height.
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BMI Calculator
Key Information
| Parameter | Details |
|---|---|
| Healthy BMI Range | 18.5 - 24.9 |
| Devine Formula (Male) | 50 + 2.3 kg per inch over 5 feet |
| Devine Formula (Female) | 45.5 + 2.3 kg per inch over 5 feet |
| WHO Recommendation | Maintain BMI 18.5-24.9 |
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Use Calculator NowFrequently Asked Questions
How much should I weigh for my height?
For a 170 cm (5 foot 7) male: ideal weight ranges from 58-73 kg depending on the formula used. For a 160 cm (5 foot 3) female: ideal weight ranges from 49-63 kg. These are guidelines not absolutes. A muscular person may weigh more than the ideal range while being perfectly healthy. Use these numbers as a starting reference point.
Is the ideal weight calculator accurate?
No single formula is perfectly accurate for every individual. Body composition (muscle vs fat) frame size (small medium large) age and ethnicity all affect what a healthy weight looks like. The calculator provides a scientifically-based range not a precise target. If you are within 10% of the calculated range and have healthy body composition blood pressure and blood markers your weight is likely fine.
How to reach your ideal weight safely?
Aim to gain or lose no more than 0.5-1 kg per week. This requires a 500-1000 calorie daily deficit for weight loss or surplus for weight gain. Focus on protein intake (1.6-2.2 g per kg bodyweight) to preserve muscle during weight loss or build it during weight gain. Combine dietary changes with both resistance training and cardio for optimal body composition changes.
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Last updated: March 2026