Calculate your ideal weight using multiple scientific formulas
Ideal body weight is an estimate of a healthy weight for a person based on their height and gender. Multiple formulas exist, each developed by different researchers.
The healthy weight range based on BMI (18.5-24.9) is generally considered the most accurate indicator of healthy weight for most adults.
Remember that ideal weight can vary based on factors like muscle mass, bone density, and body composition. These calculators provide estimates and should not replace medical advice.
Compare results from Robinson, Miller, Devine, and Hamwi formulas for comprehensive analysis
See your healthy weight range based on WHO BMI standards (18.5-24.9)
Accurate results tailored for male and female body compositions
Switch between kg/cm and lbs/feet-inches for your convenience
Uses established medical formulas from respected researchers (1964-1983)
Easy-to-read results with prominent healthy weight range and formula comparisons
Ideal body weight (IBW) is an estimate of a healthy weight for a person based primarily on their height and gender. It's calculated using various formulas developed by medical researchers. IBW serves as a reference point for health assessments, medication dosing, and nutrition planning.
No single formula is universally most accurate. The Devine formula is widely used in medical settings for medication dosing. The Robinson and Miller formulas are considered more modern. The BMI-based healthy weight range (18.5-24.9) is recommended by WHO as it accounts for individual variation. Compare multiple formulas for the best perspective.
BMI (Body Mass Index) is a ratio of weight to height that categorizes you as underweight, normal, overweight, or obese. Ideal weight formulas calculate a specific target weight based on your height and gender. BMI gives you a range, while IBW formulas provide a specific number. Both are tools, not absolute measures of health.
No, traditional ideal weight formulas don't account for muscle mass, body composition, bone density, or frame size. Athletes and very muscular individuals may weigh more than their calculated ideal weight and still be healthy. These formulas work best for average body compositions and should be used as general guidelines.
The Devine formula, created in 1974, is widely used in medical settings to calculate medication dosages, particularly for drugs that distribute based on lean body mass. It's also used for nutritional assessments and ventilator settings. For men: 50 kg + 2.3 kg per inch over 5 feet. For women: 45.5 kg + 2.3 kg per inch over 5 feet.
Different formulas can give results that vary by 5-15 pounds (2-7 kg) for the same person. This variation is normal and reflects that ideal weight is a range, not a precise number. The BMI-based healthy weight range typically spans 30-40 pounds (14-18 kg), showing that there's significant healthy variation.
Not necessarily. Ideal weight formulas provide guidelines, not targets you must hit exactly. Being within the healthy BMI range (18.5-24.9) is more important than matching a specific number. Focus on overall health indicators: energy levels, fitness, blood pressure, cholesterol, and how you feel. Consult healthcare providers for personalized advice.
Most ideal weight formulas were developed for average heights (roughly 5'0" to 6'6" or 152-198 cm) and may be less accurate for very short or very tall individuals. They're designed for adults over 18 years old. For children, adolescents, or individuals with extreme heights, specialized growth charts and formulas should be used.