What is an ideal weight calculator?
An ideal weight calculator estimates a healthy body weight range based on height and gender using established formulas like the Robinson formula. Ideal weight is a reference point for health and fitness goals, though individual optimal weight varies based on body composition, muscle mass, bone density, and other factors. This calculator provides estimates to help guide weight management decisions and set realistic goals.
Enter your height (in centimeters or inches), select your gender, choose metric or imperial units, then click Get result to see your estimated ideal weight and healthy weight range. No sign-up required. Use it as a reference point for health goals, but remember that ideal weight is just one factor in overall health.
How to use this ideal weight calculator
Select your preferred unit system (metric for centimeters and kilograms, or imperial for inches and pounds). Enter your height accurately—measure without shoes, in the morning for consistency. Select your gender (formulas differ slightly for men and women). Click Get result to see your estimated ideal weight and a healthy weight range (typically ±10% of ideal). The calculator uses the Robinson formula, which is considered more accurate than older formulas like Devine or Hamwi.
Understanding ideal weight formulas
The Robinson formula (1983) is used here because it's more accurate than older formulas. For men: Ideal Weight (lbs) = 52 + 1.9 × (height in inches - 60). For women: Ideal Weight (lbs) = 49 + 1.7 × (height in inches - 60). The formula accounts for the fact that taller people naturally weigh more, and men typically have more muscle mass than women. The healthy range shown is ±10% of ideal weight, accounting for natural variation in body composition.
Ideal weight vs BMI
Ideal weight calculators provide a single number or range, while BMI (Body Mass Index) categorizes weight into ranges (underweight, normal, overweight, obese). Both are screening tools, not diagnostic. BMI is calculated as weight divided by height squared and doesn't account for muscle mass, bone density, or body composition. Ideal weight formulas are simpler but also don't account for these factors. For a complete health assessment, consider both along with body fat percentage, waist circumference, and other health markers.
When ideal weight matters
Ideal weight is useful as a reference point for health goals, weight management planning, or understanding where you fall relative to population averages. However, it's just one factor. A person with high muscle mass might weigh more than "ideal" but be very healthy. Someone with low muscle mass might be at "ideal" weight but have high body fat. Focus on overall health: regular exercise, balanced nutrition, adequate sleep, and stress management matter more than hitting an exact weight number.
Limitations of ideal weight calculators
Ideal weight formulas don't account for muscle mass (athletes may weigh more than ideal but be very healthy), bone density (people with denser bones weigh more), body fat percentage (two people at the same weight can have very different health), age (metabolism and body composition change with age), or medical conditions. The calculator provides estimates based on population averages. Individual optimal weight varies significantly. Use it as a guide, not a strict target.
Tips for healthy weight management
Focus on sustainable habits rather than hitting an exact number: regular physical activity (both cardio and strength training), balanced nutrition (whole foods, appropriate portions), adequate sleep (7-9 hours), stress management, and consistency. If you're significantly above or below ideal weight, consult a healthcare provider or registered dietitian for personalized guidance. Rapid weight loss or gain can be unhealthy. Aim for gradual, sustainable changes. Remember that health is about more than weight—energy levels, strength, flexibility, and overall well-being matter too.
Summary
This ideal weight calculator estimates healthy body weight based on height and gender using the Robinson formula. Enter height, select gender and units, then click Get result to see ideal weight and healthy range. It's free, works in your browser, and requires no account. Use it as a reference for health goals, but remember that ideal weight is just one factor. Individual optimal weight varies based on body composition, muscle mass, and other factors. Focus on overall health habits rather than hitting an exact number.