Find Your Ideal Body Weight Using Multiple Scientific Formulas
Ideal body weight is calculated using various formulas based on height, gender, and frame size. The most common formulas include: Devine (men: 50kg + 2.3kg per inch over 5ft; women: 45.5kg + 2.3kg per inch over 5ft), Robinson, Miller, and Hamwi formulas. For example, a 5'8" (173cm) man has an ideal weight range of approximately 68-75kg (150-165 lbs) depending on the formula used. Remember these are guidelines - healthy weight varies by individual.
This calculator uses multiple scientifically-validated formulas to provide a healthy weight range based on your height, gender, and body frame.
This Ideal Weight Calculator calculates ideal body weight using multiple established formulas including Devine, Robinson, Miller, and Hamwi. It provides a healthy weight range rather than a single number, following Health Canada guidelines and international medical standards for body weight assessment.
Standards: Devine Formula, Robinson Formula, Miller Formula, Hamwi Formula, Health Canada Weight Guidelines
Uses 4 different scientific formulas for comprehensive results
View healthy weight ranges based on scientific formulas and BMI
Calculations aligned with Health Canada and WHO guidelines
Set realistic weight goals based on your ideal weight range
Get immediate calculations with detailed breakdowns
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The Devine formula estimates an adult reference weight based on height above 152 cm (5 feet).
Does not account for frame size, muscle mass, or body composition; use as a reference only.
Devine, Robinson, Miller, and Hamwi Formulas
Ideal body weight is an estimated weight range based on your height, gender, and body frame. Unlike single-point calculations, modern approaches recognize that healthy weight exists within a range that varies by individual factors.
Multiple scientific formulas exist (Devine, Robinson, Miller, Hamwi), each developed for specific medical contexts. Our calculator presents results from all major formulas to give you a comprehensive view of your healthy weight range based on current medical standards.
Calculate your ideal body weight range with these simple steps:
Input your height in either metric (cm) or imperial (feet/inches) units
Different formulas apply based on biological sex due to body composition differences
Select small, medium, or large frame to refine your ideal weight range
See results from multiple formulas and your personalized healthy weight range
Different formulas were developed for specific medical and clinical purposes:
Most commonly used for medication dosing. Men: 50kg + 2.3kg per inch over 5ft. Women: 45.5kg + 2.3kg per inch over 5ft.
Updated Devine formula. Men: 52kg + 1.9kg per inch over 5ft. Women: 49kg + 1.7kg per inch over 5ft.
Alternative approach. Men: 56.2kg + 1.41kg per inch over 5ft. Women: 53.1kg + 1.36kg per inch over 5ft.
Quick calculation method. Men: 48kg + 2.7kg per inch over 5ft. Women: 45.5kg + 2.2kg per inch over 5ft.
Athletes and bodybuilders may weigh more due to muscle mass, which is healthy and expected
These formulas were developed for adults 20-65; children and older adults need different assessments
These formulas were developed primarily for Caucasian populations; other ethnicities may have different healthy ranges
Focus on overall health markers (blood pressure, cholesterol, fitness) rather than just weight
Aim for gradual weight loss of 0.5-1 kg (1-2 lbs) per week. Sustainable lifestyle changes are more effective than crash diets.
Focus on vegetables, fruits, whole grains, and protein foods. Choose plant-based proteins more often and limit highly processed foods.
Aim for 150 minutes of moderate aerobic activity per week, plus muscle-strengthening activities at least twice weekly, as recommended by the Canadian Society for Exercise Physiology.
Track your weight weekly, not daily. Look for trends over time rather than day-to-day fluctuations. Consider also tracking measurements and how clothes fit.
Drink plenty of water throughout the day. Canadian climate variations mean hydration needs change with seasons.
Aim for 7-9 hours of quality sleep. Poor sleep disrupts hunger hormones (ghrelin and leptin) and can affect metabolism.
A scientifically calculated weight range considered optimal for health based on your height, gender, and body frame. Multiple formulas exist to estimate ideal weight.
A measure of body fat based on height and weight. A BMI between 18.5 and 24.9 is considered healthy for most adults.
A weight range where health risks are lowest, typically based on BMI standards. Individual healthy weight can vary based on muscle mass, bone density, and body composition.
The size of your skeletal structure (small, medium, or large), which affects your ideal weight. Frame size can be estimated by measuring wrist circumference.
The span between minimum and maximum healthy weights for your height. This range accounts for individual variations in body composition and frame size.
Important Medical Disclaimer
This ideal weight calculator provides population-based estimates using the Devine, Robinson, Miller, and Hamwi formulas. These are not personalized medical targets. The formulas do not account for body composition, muscle mass, bone density, or individual health factors.
Always consult with a qualified Canadian healthcare provider for personalized weight management advice. A healthy weight is individual and depends on many factors beyond height and gender.
Consult a Canadian Healthcare Professional If:
Ideal weight formulas were developed decades ago from specific population samples. Understanding their limitations helps you use the results appropriately:
Formulas use only height and gender, ignoring muscle-to-fat ratio. Athletes and highly muscular individuals will consistently exceed formula estimates while being perfectly healthy.
Body frame size and optimal weight vary across ethnic backgrounds. Formulas were primarily developed from Western population data and may not apply equally to all demographics.
Body composition naturally shifts with aging — muscle mass decreases while fat distribution changes. A healthy weight at 25 may differ from a healthy weight at 65.
Genetics play a significant role in determining healthy weight. Some individuals are naturally healthy at weights above or below formula estimates.
Canadian Health Guidelines: Obesity Canada and Health Canada provide evidence-based guidelines for weight assessment that go beyond simple formulas. A comprehensive evaluation by a healthcare provider considers BMI, waist circumference, metabolic markers, and overall health status.
This calculator is based on the following authoritative sources and research:
Important Note: Ideal weight calculations provide general guidelines based on height and gender. Actual healthy weight varies based on muscle mass, bone density, body composition, and individual health factors. Consult with a healthcare provider for personalized weight management advice.
Common questions about ideal weight and weight management
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