Ideal Weight Calculator
The Ideal Weight Calculator computes ideal body weight (IBW) ranges based on height, gender, and age. The idea of finding the IBW using a formula has been sought after by many experts for a long time.
Currently, there persist several popular formulas, and our Ideal Weight Calculator provides their results for side-to-side comparisons.
Calculate Your Ideal Weight
Modify the values and click the Calculate button to use
Ages 2 - 80
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What is Ideal Body Weight?
Ideal body weight (IBW) is an estimate of the weight that is considered healthiest for a person based on their height, gender, and sometimes age. This concept was originally developed to help determine appropriate drug dosages but has since been used as a reference point for healthy weight goals.
It's important to note that ideal body weight is a statistical concept and does not take into account factors like body composition, muscle mass, bone density, or individual health conditions. Therefore, it should be used as a general guideline rather than a strict standard.
Ideal Weight Calculation Formulas
Devine Formula (1974)
One of the most widely used IBW formulas in clinical settings, especially for drug dosing calculations.
$$IBW (men) = 50 + 2.3 \times (Height_{in} - 60)$$
$$IBW (women) = 45.5 + 2.3 \times (Height_{in} - 60)$$
Robinson Formula (1983)
A modified version of the ideal weight formula that often gives slightly lower results than Devine's formula.
$$IBW (men) = 52 + 1.9 \times (Height_{in} - 60)$$
$$IBW (women) = 49 + 1.7 \times (Height_{in} - 60)$$
Miller Formula (1983)
A formula that tends to give results between the Devine and Hamwi formulas for most heights.
$$IBW (men) = 56.2 + 1.41 \times (Height_{in} - 60)$$
$$IBW (women) = 53.1 + 1.36 \times (Height_{in} - 60)$$
Hamwi Formula (1964)
One of the earliest IBW formulas, developed by Dr. G.J. Hamwi for use in diabetes management.
$$IBW (men) = 48 + 2.7 \times (Height_{in} - 60)$$
$$IBW (women) = 45.5 + 2.2 \times (Height_{in} - 60)$$
Healthy Weight Range Based on BMI
In addition to the formula-based calculations, a common approach to determining a healthy weight range is using Body Mass Index (BMI). A BMI between 18.5 and 24.9 is generally considered healthy for most adults.
BMI-Based Weight Range
To calculate the healthy weight range based on BMI, we can use the BMI formula rearranged to solve for weight:
$$Weight = BMI \times Height^2$$
How to Use This Calculator
- Select your preferred unit system (Metric or Imperial).
- Enter your age and select your gender.
- Input your height (in centimeters or feet and inches).
- Click the 'Calculate' button to see your ideal weight according to different formulas.
Limitations of Ideal Weight Calculations
Medical Disclaimer
This calculator provides estimates based on statistical formulas and should not be considered medical advice. Consult with healthcare professionals for personalized weight management guidance.
- These formulas do not account for individual body composition, including muscle mass and bone density.
- They don't consider factors like age (except when specifically mentioned), ethnicity, or overall health status.
- Athletes and highly muscular individuals may have a healthy weight that's higher than the calculated ideal weight.
- Older adults may have different healthy weight considerations due to natural changes in body composition with aging.
Healthy Weight Management Tips
Balanced Diet
Focus on whole foods including fruits, vegetables, lean proteins, and whole grains. Limit processed foods, added sugars, and excessive salt intake.
Regular Physical Activity
Aim for at least 150 minutes of moderate aerobic activity or 75 minutes of vigorous activity per week, plus muscle-strengthening activities twice weekly.
Healthy Lifestyle Habits
Maintain adequate sleep, manage stress, stay hydrated, and avoid smoking and excessive alcohol consumption.
Frequently Asked Questions
Why do different formulas give different ideal weight results?
Each formula was developed by different researchers at different times, using varied methodology and subject populations. This leads to variations in the calculated ideal weights, which is why it's helpful to compare multiple formulas.
Is my ideal weight the same as my healthy weight?
Not necessarily. Ideal weight formulas provide statistical estimates that don't account for individual factors like body composition, muscle mass, or specific health conditions. A healthy weight for you should be determined in consultation with healthcare professionals.
How accurate are these ideal weight calculations?
These calculations provide general estimates based on population statistics. Their accuracy varies depending on individual factors not accounted for in the formulas, such as body frame size, muscle mass, and genetic factors.
Should I try to achieve the exact ideal weight calculated?
Rather than focusing on an exact number, it's better to consider a healthy weight range. The BMI-based range (18.5-24.9) provides flexibility that accounts for individual variations. Focus on overall health, including balanced nutrition, regular physical activity, and other healthy lifestyle habits.