Ideal Weight Calculator

What is Ideal Body Weight?

Ideal body weight (IBW) refers to the optimal weight for a person's height, gender, and body frame. It's a range that suggests what your weight should be to minimize health risks and maximize overall wellness.

There are several scientific formulas developed over the years to estimate ideal body weight, each with its own approach and considerations. Our calculator uses multiple formulas to give you a comprehensive view of your ideal weight range.

Ideal Weight Formulas Explained

Robinson (1983)

The Robinson formula (1983) is a widely used equation that provides a balanced estimate of ideal body weight based on height and gender.

Miller (1983)

The Miller formula (1983) offers similar results to Robinson but with slightly different coefficients, providing an alternative perspective on ideal weight.

Devine (1974)

The Devine formula (1974) is one of the most commonly used formulas in medical settings, particularly for calculating medication dosages.

Hamwi (1964)

The Hamwi formula (1964) is another classic formula that has been used extensively in clinical practice for decades.

BMI Method

The BMI method calculates ideal weight based on a BMI of 22, which is in the middle of the healthy BMI range (18.5-24.9).

Weight = BMI × Height² (using BMI 18.5-24.9 for healthy range)

Understanding Body Frame

Body frame size is an important factor in determining ideal weight. People with different frame sizes can have different ideal weights even at the same height:

• Small Frame: Narrow shoulders and hips, slender wrists and ankles. Typically requires 10% less weight than medium frame.
• Medium Frame: Average bone structure and proportions. This is the baseline for most ideal weight calculations.
• Large Frame: Broad shoulders and hips, larger wrists and ankles. Can typically carry 10% more weight than medium frame.

Factors Affecting Ideal Weight

• Height: Taller individuals typically have higher ideal weights
• Gender: Males generally have higher ideal weights than females at the same height due to greater muscle mass
• Age: Metabolism and body composition change with age, potentially affecting ideal weight
• Body Frame Size: Bone structure plays a significant role in determining healthy weight
• Muscle Mass: People with more muscle mass may weigh more while still being healthy
• Genetics: Family history and genetic factors influence body composition
• Activity Level: Regular exercise and physical activity affect ideal weight and body composition

Important Considerations

• These formulas provide estimates and guidelines, not absolute targets. Individual variations are normal and healthy.
• Ideal weight is not the same as perfect weight. Health is about more than just a number on the scale.
• Athletes and very muscular individuals may have a higher ideal weight due to increased muscle mass.
• Older adults may have a slightly higher healthy weight range than younger adults.
• Body composition (muscle vs. fat) is more important than weight alone for overall health.
• These calculations are not suitable for children, pregnant women, or individuals with certain medical conditions.
• If you have concerns about your weight or health, consult with a healthcare professional.
• Focus on sustainable healthy habits rather than reaching a specific number on the scale.