Ideal Weight Calculator
Find your ideal body weight range based on height using multiple formulas.
Ideal Weight Calculator
Find your ideal body weight range based on height using multiple formulas.
Body Mass Index (BMI)
ℹ️ Underweight < 18.5 | Normal 18.5–24.9 | Overweight 25–29.9 | Obese ≥ 30
Disclaimer
Results provided by this calculator are for informational and educational purposes only. They are based on the values you enter and standard formulas, and should not be considered financial, medical, legal, or professional advice. Always consult a qualified professional before making important decisions based on these results. Roughtools makes no warranties regarding the accuracy or completeness of these calculations for your specific situation.
Frequently Asked Questions
Pro Tips
BMI does not distinguish between muscle and fat — athletes routinely register as "overweight." Use BMI alongside waist circumference and body fat percentage for a complete picture.
Waist-to-height ratio (waist ÷ height) below 0.5 is a strong predictor of metabolic health — often more useful than BMI for assessing cardiovascular risk.
Asian populations have higher metabolic risk at lower BMI values. Some clinicians use BMI ≥23 as overweight for Asian adults, not the WHO standard of 25.
Track your BMI trend over months, not as a single snapshot. A consistent downward trend matters far more than hitting a specific number on any given day.
When to Use This Calculator
Calculate your BMI as part of your annual health self-assessment alongside blood pressure and cholesterol.
Find the BMI-normal weight range for your height to set a realistic, medically-recognised target weight.
Check whether BMI is in the healthy range before conceiving — optimal range reduces pregnancy complications.
Monitor BMI monthly during a training program — though note athletes may show high BMI despite low body fat.
Calculate your BMI in advance so you can have an informed conversation about your weight with your healthcare provider.
About the Ideal Weight Calculator
This ideal weight calculator presents your target weight range using four established medical formulas — Hamwi (1964), Devine (1974), Robinson (1983), and Miller (1983) — all based on your height and sex. Rather than a single "ideal" number, results show a range that reflects natural variability in healthy body composition. Note that body composition and overall health matter more than hitting any specific scale number.
How to Use the Ideal Weight Calculator
- 1
Select your sex.
- 2
Enter your height in feet/inches or centimeters.
- 3
See ideal weight estimates from all four major medical formulas.
- 4
Review the recommended healthy BMI weight range as a comparison.
- 5
Use as a general reference — actual health goals should account for body composition, not just weight.
Related Calculators
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Lean Body Mass Calculator
Estimate lean body mass (muscle + bone + organs) using height and weight.
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