Ideal Weight Calculator
Calculate your ideal body weight using multiple scientifically-validated formulas
Your Information
Example: 70 inches (5'10")
About These Formulas
These formulas were developed by medical researchers to estimate ideal body weight. Results may vary based on body composition, frame size, and muscle mass.
Your Ideal Weight
0
lbs
Healthy Range
0 - 0 lbs
Formula Breakdown
Robinson Formula
Most commonly used
Miller Formula
1983 study
Devine Formula
Drug dosing standard
Hamwi Formula
Nutrition planning
Important Factors
- • Body frame size affects ideal weight
- • Muscle weighs more than fat
- • Age can influence healthy weight
- • Consider body composition over weight alone
Understanding Ideal Body Weight Formulas
The Four Formulas
Robinson Formula (1983)
Most commonly cited in medical literature. Based on actuarial data.
Men: 52 kg + 1.9 kg per inch over 5 feet
Women: 49 kg + 1.7 kg per inch over 5 feet
Miller Formula (1983)
Based on body volume and density studies.
Men: 56.2 kg + 1.41 kg per inch over 5 feet
Women: 53.1 kg + 1.36 kg per inch over 5 feet
Devine Formula (1974)
Widely used in medicine for drug dosing calculations.
Men: 50 kg + 2.3 kg per inch over 5 feet
Women: 45.5 kg + 2.3 kg per inch over 5 feet
Hamwi Formula (1964)
Originally developed for nutrition planning.
Men: 48 kg + 2.7 kg per inch over 5 feet
Women: 45.5 kg + 2.2 kg per inch over 5 feet
Limitations & Considerations
Body Frame Size
These formulas don't account for small, medium, or large frames. Adjust ±10% based on your frame.
Muscle Mass
Athletes and bodybuilders may exceed these weights due to muscle mass, which is healthy.
Age Considerations
These formulas were developed for adults. Not accurate for children, adolescents, or elderly.
Better Metrics
Body fat percentage, waist circumference, and overall fitness are better health indicators than weight alone.
Individual Variation
Ethnicity, bone density, and genetics affect healthy weight ranges. Use these as guidelines, not absolutes.
Determining Your Frame
Wrap your thumb and middle finger around your opposite wrist:
- • Fingers overlap: Small frame (-10% from ideal)
- • Fingers just touch: Medium frame (use ideal weight)
- • Fingers don't touch: Large frame (+10% to ideal)
When to Use These Formulas
Good For:
- ✓ General health reference point
- ✓ Setting initial weight loss/gain goals
- ✓ Medical dosing calculations
- ✓ Insurance and health screening
Less Accurate For:
- ✗ Athletes with high muscle mass
- ✗ Pregnant or breastfeeding women
- ✗ Children and adolescents
- ✗ Elderly individuals
Important Reminders
✓ These are estimates: Use as a general guideline, not an absolute target.
✓ Health over numbers: Focus on healthy habits rather than hitting a specific weight.
✓ Body composition matters: Muscle mass, bone density, and body fat % are more important than weight.
✓ Individual factors: Age, ethnicity, genetics, and lifestyle affect healthy weight.
✓ Consult professionals: Work with doctors or dietitians for personalized advice.
✓ Sustainable approach: Gradual, healthy changes beat quick fixes every time.
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