Ideal Weight Calculator
Calculate your ideal weight range using 4 scientific formulas based on your height and gender.
Your Measurements
⚖️ Your Ideal Weight
Average Across All Formulas
159.6 lbs
160.9
Devine
lbs
156.5
Robinson
lbs
155.0
Miller
lbs
166.0
Hamwi
lbs
📊 Healthy BMI Range (18.5 - 24.9)
128.9 - 173.5 lbs
This range is broader and accounts for individual variation in body composition.
📖 About Each Formula
Devine Formula
Devine (1974) - Originally used for drug dosing calculations. Most widely used in clinical settings.
Result: 160.9 lbs
Robinson Formula
Robinson (1983) - Revised the Devine formula. Common in nutritional assessment.
Result: 156.5 lbs
Miller Formula
Miller (1983) - Generally gives the lowest estimates. Often used for lean framing.
Result: 155.0 lbs
Hamwi Formula
Hamwi (1964) - The oldest formula. Easy to calculate mentally. Common in diabetes care.
Result: 166.0 lbs
⚠️ These formulas don't account for muscle mass. Athletes may weigh 10-30 lbs more than ideal weight predictions while remaining very healthy. Always consult a healthcare provider for personalized guidance.
Frequently Asked Questions
Which ideal weight formula is most accurate?
No single formula is perfect for everyone. The Devine formula (developed for drug dosing) and Robinson formula are widely used in clinical settings. The Hamwi formula is the simplest to calculate mentally. Results typically differ by 5-10 lbs between formulas. The BMI range (18.5-24.9) gives a broader range that accounts for body composition variation.
Why do different formulas give different results?
Each formula was developed in different eras (1960s-1980s) for different purposes - some for pharmacology, some for clinical nutrition. They vary in how they account for height above a baseline and differ slightly in the baseline weight used. None were designed to be universal ideal weight standards for athletes or diverse body types.
Are these formulas accurate for athletes?
No - these formulas don't account for muscle mass. A 6-foot bodybuilder at 220 lbs of mostly muscle would be flagged as 'overweight' by these formulas and by BMI. Athletes and very muscular individuals typically weigh 10-30 lbs more than formula predictions while being healthy. Body fat percentage is a better metric for athletes.
What BMI range is considered healthy?
BMI 18.5-24.9 is considered the healthy range. Underweight is below 18.5, overweight is 25-29.9, and obese is 30+. BMI has limitations - it doesn't distinguish muscle from fat, and may misclassify muscular individuals as overweight or older adults (who lose muscle) as healthy despite high body fat.
How should I use these results?
Use these as a general reference, not a rigid target. Focus on health markers (blood pressure, blood sugar, cholesterol, energy levels) and fitness goals rather than hitting an arbitrary number. Discuss your healthy weight target with a doctor or dietitian who can account for your full health picture.
How to Use
Select your gender and unit system
Results differ by gender. Choose imperial (ft/in/lbs) or metric (cm/kg) for your preferred units.
Enter your height
Enter your height as accurately as possible. These formulas are very sensitive to height input.
Review the 4 formulas
Each formula gives a slightly different result. The average across formulas gives a balanced estimate.
Compare with the BMI range
The healthy BMI range (18.5-24.9) gives a broader reference that may differ from formula-based estimates.