Ideal Weight Calculator
Calculate your ideal weight range based on height and gender using multiple formulas
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Ideal Weight by Formula
Most commonly used formula
Similar to Robinson formula
Original formula for medication dosing
One of the earliest formulas
Recommended Range
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Est. Recommended Range
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How Ideal Weight is Calculated?
Ideal weight is calculated using multiple established medical formulas that have been developed over decades of research. Each formula uses height and gender as primary factors, as these are the most reliable predictors of healthy weight ranges.
Four Medical Formulas Used:
1. Robinson Formula (1983)
Most commonly used in clinical settings, provides balanced estimates for both men and women.
2. Miller Formula (1983)
Similar to Robinson, developed around the same time with slight variations in coefficients.
3. Devine Formula (1974)
Originally developed for medication dosing, widely used in medical practice.
4. Hamwi Formula (1964)
One of the earliest formulas, still referenced in medical literature.
Example:
Let's calculate ideal weight for a 30-year-old man who is 175 cm (5 feet 9 inches) tall.
Given: Height = 175 cm (69 inches), Gender = Male
Step 1: Calculate using Robinson Formula (1983)
Ideal Weight = 52 + 1.9 × (69 - 60) = 52 + 17.1 = 69.1 kg
Step 2: Calculate using Miller Formula (1983)
Ideal Weight = 56.2 + 1.41 × (69 - 60) = 56.2 + 12.69 = 68.89 kg
Step 3: Calculate using Devine Formula (1974)
Ideal Weight = 50 + 2.3 × (69 - 60) = 50 + 20.7 = 70.7 kg
Step 4: Calculate using Hamwi Formula (1964)
Ideal Weight = 48 + 2.7 × (69 - 60) = 48 + 24.3 = 72.3 kg
Step 5: Calculate Average
Average = (69.1 + 68.89 + 70.7 + 72.3) / 4 = 70.25 kg
Step 6: Calculate Range (±10%)
Range = 70.25 × 0.9 to 70.25 × 1.1
Range = 63.2 kg to 77.3 kg
Result: The ideal weight range for this person is approximately 63.2 kg to 77.3 kg, with an average of 70.3 kg.
Our calculator averages all four formulas and provides a ±10% range to account for individual variations in body composition, muscle mass, and frame size. This gives you a comprehensive and realistic ideal weight range.
Use Cases for Ideal Weight Calculator
Weight Goal Setting
Set realistic and healthy weight targets based on your height and gender
Fitness Planning
Determine target weight for athletic performance or body composition goals
Health Assessment
Understand healthy weight ranges for your body frame and build
Progress Tracking
Monitor weight changes relative to your ideal weight range
Weight Management
Plan weight loss or gain programs with specific target ranges
Medical Reference
Used by healthcare professionals for patient assessments
Benefits of Knowing Your Ideal Weight
Realistic Goal Setting
Set achievable weight goals based on medical formulas rather than arbitrary numbers.
Health Optimization
Maintain weight within healthy ranges to reduce risk of weight-related health issues.
Multiple Formula Average
Get a comprehensive estimate by averaging four different medical formulas.
Gender-Specific Ranges
Receive accurate estimates tailored to your gender, as ideal weight differs between men and women.
Flexible Range
Get a ±10% range that accounts for individual body composition and frame size variations.
Medical Foundation
Based on formulas used by healthcare professionals worldwide for decades.
Ideal Weight Calculator FAQs
❓What is ideal weight and how is it different from BMI?
Ideal weight is a target weight range based on your height and gender using medical formulas. BMI (Body Mass Index) is a ratio of weight to height squared. Ideal weight provides a specific weight target, while BMI categorizes you into weight ranges. Both are useful for health assessment.
❓Why are there different ideal weight formulas?
Different formulas were developed at different times and for different purposes (medication dosing, clinical assessment, etc.). Each has slight variations, so averaging multiple formulas provides a more comprehensive and reliable estimate than using a single formula.
❓Is ideal weight the same for everyone of the same height?
No, ideal weight varies by gender and individual factors like body frame size, muscle mass, and bone density. That's why we provide a ±10% range to account for these variations. Men typically have higher ideal weights than women of the same height.
❓What if I'm a bodybuilder or athlete?
Ideal weight formulas are designed for the general population. Athletes and bodybuilders with high muscle mass may weigh more than the "ideal" range but still be healthy. Body fat percentage and body composition are better indicators for athletes than weight alone.
❓Should I aim for the exact average ideal weight?
The ±10% range is provided because individual ideal weight can vary based on body composition, frame size, and muscle mass. Being within the range is more important than hitting the exact average. Focus on overall health and body composition rather than a specific number.
❓Is this ideal weight calculator free?
Yes, our ideal weight calculator is completely free to use with no registration required. You can use it with both metric and imperial units.