Ideal Weight Calculator
Calculate your ideal body weight using multiple validated formulas
Formula Results
How to Use the Ideal Weight Calculator
- Select your gender and preferred unit system (metric or imperial)
- Enter your height accurately using the appropriate fields
- Choose your body frame size (small, medium, or large)
- Optionally enter your current weight to see the difference
- View results from multiple validated formulas
- Use the average or range as your target ideal weight
What is Ideal Weight?
Ideal weight is a range of weight that is associated with optimal health outcomes, longevity, and physical well-being. It's calculated using height-based formulas developed through extensive medical research and statistical analysis of healthy populations.
Amazing Weight Facts
Multiple Formulas Exist
There are over 10 different formulas for calculating ideal weight, each developed for specific populations and purposes.
Height Matters Most
All ideal weight formulas are primarily based on height, as it's the strongest predictor of healthy weight range.
Gender Differences
Men typically have higher ideal weights than women of the same height due to differences in muscle mass and bone density.
Medical Origins
Most ideal weight formulas were developed by physicians and researchers studying healthy populations and longevity.
Formulas Explained
Our calculator uses four well-established formulas, each with unique strengths and applications in medical practice.
Robinson Formula (1983)
Most commonly used in clinical practice. Provides reliable estimates for average body frames.
Miller Formula (1983)
Similar to Robinson but with slight modifications. Good for general population estimates.
Devine Formula (1974)
Widely used in pharmacy for drug dosing calculations. Conservative estimates.
Hamwi Formula (1964)
Original formula still used today. Simple calculation method with proven reliability.
Body Frame Size Guide
Your body frame size affects your ideal weight range. Use the wrist test below to determine your frame size.
Small Frame
Narrow shoulders and hips, smaller bone structure, lower ideal weight range.
Medium Frame
Average bone structure and proportions, standard ideal weight calculations.
Large Frame
Broader shoulders and hips, larger bone structure, higher ideal weight range.
Wrist Test for Frame Size
Wrap your thumb and middle finger around your wrist where it bends:
- Fingers overlap = Small frame
- Fingers just touch = Medium frame
- Fingers don't touch = Large frame
Factors Affecting Ideal Weight
Age
Metabolism and muscle mass change with age, potentially affecting ideal weight ranges.
Muscle Mass
Athletic individuals may weigh more than calculated ideal weight due to muscle density.
Bone Density
Heavier bone structure increases healthy weight range beyond standard calculations.
Ethnicity
Different ethnic groups may have varying healthy weight ranges for the same height.
Ideal Weight Tips
Use Range, Not Exact Number
Ideal weight is best viewed as a healthy range rather than a specific target number.
Consider Body Composition
Muscle weighs more than fat, so athletes may exceed ideal weight calculations while being healthy.
Focus on Health Markers
Blood pressure, cholesterol, and energy levels are more important than the number on the scale.
Consult Healthcare Providers
Individual health conditions may affect what constitutes an ideal weight for you specifically.
Achieving Your Ideal Weight
To Lose Weight
- Create a moderate caloric deficit (300-500 calories daily)
- Include both cardiovascular and strength training
- Focus on nutrient-dense, whole foods
- Stay hydrated and get adequate sleep
- Track progress with measurements, not just scale weight
To Gain Weight
- Eat in a slight caloric surplus (300-500 calories daily)
- Focus on strength training to build muscle
- Choose calorie-dense, nutritious foods
- Eat frequent, smaller meals throughout the day
- Include healthy fats and protein with each meal
To Maintain Weight
- Balance calorie intake with energy expenditure
- Maintain regular exercise routine
- Weigh yourself weekly, not daily
- Focus on sustainable lifestyle habits
- Allow for normal weight fluctuations (2-3 lbs)
Frequently Asked Questions
Which formula is most accurate?
The Robinson formula is most commonly used in clinical practice, but using the average of all formulas provides the most reliable estimate.
Should I aim for the exact calculated weight?
No, ideal weight should be viewed as a healthy range. Being within 10-15 pounds of the calculated weight is typically healthy.
Do these formulas work for everyone?
These formulas work best for adults of average build. They may be less accurate for very muscular, elderly, or very short/tall individuals.
How does frame size affect ideal weight?
Small frames may target the lower end of the ideal range, while large frames may target the higher end, typically varying by 10% above or below.
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