Free Ideal Weight Calculator
Enhanced Ideal Weight Calculator
Calculate your ideal weight using multiple medical formulas with personalized insights
"All Formulas" provides the most comprehensive analysis
Helps provide personalized weight management advice
Age-specific considerations for ideal weight
Body frame affects ideal weight by ±5%. Leave blank if unsure.
How to Use the Ideal Weight Calculator
Our ideal weight calculator uses multiple established medical formulas to provide you with the most accurate and comprehensive results. The calculator combines the Robinson, Miller, Devine, and Hamwi formulas along with WHO's healthy BMI range to give you a realistic target weight range. Simply enter your basic information and let our advanced algorithm determine your ideal weight based on scientific research and population studies.
Select your preferred unit system (Metric or Imperial)
💡 Pro Tip
For the most accurate results, use 'All Formulas' option which combines multiple methods and provides a comprehensive weight range rather than a single number.
What the Ideal Weight Calculator Calculates
The Ideal Weight Calculator determines your target weight using five different scientific methods, each with its own strengths and applications. The Robinson Formula (1983) is considered most accurate for general adult populations and is based on extensive research. The Miller Formula (1983) uses large population studies for statistical accuracy. The Devine Formula (1974) is widely used in medical settings for medication dosing and clinical assessments. The Hamwi Formula (1964) is popular among nutritionists and dietitians for meal planning. Finally, the Healthy BMI Range method uses World Health Organization standards to determine weight ranges associated with optimal health outcomes. Our calculator also provides body frame adjustments, health assessments when you enter your current weight, and personalized recommendations based on your individual profile. The results include your primary recommended weight, a healthy range, detailed formula breakdowns, and actionable advice for achieving and maintaining your ideal weight.
Example Calculations
Average Height Woman
Input Values
Ideal Weight Result
For a 165cm woman, the ideal weight averages around 59kg across all formulas, with a healthy range of 54-67kg.
Tall Man Example
Input Values
Ideal Weight Result
Using the Robinson formula, a 185cm man's ideal weight is approximately 79kg, representing optimal weight for health.
Weight Loss Goal
Input Values
Ideal Weight Result
Current weight of 85kg is 22kg above ideal weight of 63kg, suggesting a structured weight loss plan.
💡 Understanding Your Results
These examples show typical scenarios for different heights and genders. Remember that ideal weight is a range, not a single number. Your healthiest weight may vary based on muscle mass, bone density, and individual body composition.
Frequently Asked Questions
Still have questions about BMI calculations?
Try the CalculatorMedical Formulas & Scientific Background
Understanding the different methods used to calculate ideal weight
Formula
Robinson Formula (1983)
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)
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)
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)
Men: 48 kg + 2.7 kg per inch over 5 feet | Women: 45.5 kg + 2.2 kg per inch over 5 feet
Healthy BMI Range
Weight range where BMI = 18.5 to 24.9 kg/m²
Scientific Background
Ideal weight formulas have evolved over decades of medical research. The earlier Hamwi (1964) and Devine (1974) formulas were developed for specific medical applications. The Robinson and Miller formulas (both 1983) incorporated larger datasets and more sophisticated statistical methods. Modern approaches also consider BMI ranges established by the World Health Organization. Each formula has strengths and limitations, which is why our calculator uses multiple methods to provide a comprehensive assessment.
Medical Disclaimer
This ideal weight calculator is for informational purposes only and is not intended to replace professional medical advice, diagnosis, or treatment. Ideal weight calculations are estimates that may not account for individual factors such as muscle mass, bone density, body composition, medical conditions, or genetic factors. Athletes, bodybuilders, and individuals with high muscle mass may have higher healthy weights than calculated. Always consult with qualified healthcare providers before making significant changes to your diet or exercise routine.