Ideal Weight Calculator - Find Your Ideal Body Weight Free Ideal Weight Calculator
Calculate your ideal body weight using four scientific formulas — Devine, Robinson, Miller and Hamwi. Enter your gender and height to see recommended ideal weight range.
Your Details
Your Results
Ideal Weight by Formula Male
| Formula | Ideal Weight (kg) | Ideal Weight (lbs) |
|---|---|---|
| Devine | 68.0 | 149.9 |
| Robinson | 66.5 | 146.6 |
| Miller | 66.1 | 145.7 |
| Hamwi | 68.2 | 150.4 |
Ideal Weight Calculator - Guide
What is Ideal Body Weight?
Ideal Body Weight (IBW) is an estimated weight range based on your height and gender that is associated with the lowest health risk and optimal well-being. Several formulas have been developed over the decades by medical researchers to provide these estimates.
While no single number defines the “perfect” weight, comparing results from multiple formulas gives a reliable recommended range.
Formulas Used
Devine Formula (1974):
Men: IBW = 50 + 2.3 × (height in inches − 60)
Women: IBW = 45.5 + 2.3 × (height in inches − 60)
Robinson Formula (1983):
Men: IBW = 52 + 1.9 × (height in inches − 60)
Women: IBW = 49 + 1.7 × (height in inches − 60)
Miller Formula (1983):
Men: IBW = 56.2 + 1.41 × (height in inches − 60)
Women: IBW = 53.1 + 1.36 × (height in inches − 60)
Hamwi Formula (1964):
Men: IBW = 48.0 + 2.7 × (height in inches − 60)
Women: IBW = 45.5 + 2.2 × (height in inches − 60)
Understanding Your Results
- Recommended Range: The range between the lowest and highest ideal weight across all four formulas. This is a practical target.
- Healthy BMI Range: The weight range that corresponds to a BMI of 18.5–24.9 for your height. This provides additional context.
- Individual Variation: Your actual ideal weight depends on body composition, muscle mass, bone density, and overall health.
Limitations
- No Body Composition: These formulas do not account for muscle mass, body fat, or bone structure.
- Height Constraint: All formulas use 5 feet (60 inches / 152.4 cm) as the baseline. Results below this height are extrapolated and less reliable.
- Not Universal: Formulas were developed using specific populations and may not apply equally across all ethnicities and body types.
- Age Not Considered: Body composition changes with age, but these formulas do not adjust for it.
Use ideal weight as a general guideline and consult a healthcare professional for personalised advice.
Tips for Reaching a Healthy Weight
- Balanced Diet: Focus on whole foods — vegetables, fruits, lean proteins, and whole grains.
- Regular Exercise: Combine cardio and strength training for overall fitness.
- Gradual Changes: Aim for 0.25–0.5 kg per week weight change for sustainable results.
- Stay Hydrated: Drink adequate water throughout the day.
- Monitor Progress: Track using multiple metrics (weight, measurements, body fat, how clothes fit) rather than the scale alone.