Ideal Weight Calculator
Not sure what your target weight should be? Use our Ideal Weight Calculator to find a healthy range based on globally accepted medical formulas and BMI standards.
Your Details
Feet to Centimeter Conversion
Healthy Range: 56.7 - 76.6 kg
Healthy BMI Range
56.7 - 76.6 kg
Based on standard BMI (18.5 - 25.0)
Specific Formula Estimates
Formula Comparison
What is the Ideal Weight Calculator?
The Ideal Weight Calculator is a scientifically developed tool that helps you determine your healthy weight range using internationally recognized medical formulas and BMI (Body Mass Index) standards. By entering your gender, age, and height, this calculator provides an estimated ideal body weight along with a recommended healthy BMI range.
Ideal Body Weight (IBW) is a weight range that is statistically associated with the lowest mortality rate for a given height and gender. It was originally developed by insurance companies to determine premiums but is now used medically to determine dosage for medications.
Maintaining an ideal weight is essential for overall health, disease prevention, and long-term fitness. This calculator combines multiple evidence-based formulas such as Robinson (1983), Miller (1983), Devine (1974), and Hamwi (1964) to offer a well-rounded and realistic healthy weight estimate.
How it Works
The calculator first determines your healthy BMI range (typically between 18.5 and 24.9), which is considered optimal for most adults. Using your height, it calculates the minimum and maximum weight range that falls within a healthy BMI category.
Next, it applies four established ideal body weight formulas that factor in gender and height to provide specific weight estimates:
- Robinson Formula (1983)
- Miller Formula (1983)
- Devine Formula (1974)
- Hamwi Formula (1964)
These formulas were originally developed for clinical and medical assessments and are still widely used in healthcare and fitness planning.
Formula (With Example)
Devine Formula Example:
- Men: 50 kg + 2.3 kg for each inch over 5 feet
- Women: 45.5 kg + 2.3 kg for each inch over 5 feet
Example Calculation:
A male who is 5'10" (70 inches):
Height over 5 feet = 10 inches
Ideal Weight = 50 + (2.3 × 10) = 50 + 23 = 73 kg
Hamwi Formula:
- Men: 48 kg + 2.7 kg per inch over 5 feet
- Women: 45.5 kg + 2.2 kg per inch over 5 feet
Similarly, the Robinson and Miller formulas use slightly different multipliers, providing a healthy weight range rather than a single fixed number. This ensures more flexible and practical weight goals.
Which Formula Should I Trust?
- BMI Range (Best for General Health): The World Health Organization (WHO) defines a healthy BMI as 18.5 to 25. This gives you a "Range" rather than a specific number, which is more realistic for most people.
- Devine Formula (1974): This is the most widely used formula in the medical field, especially for calculating drug dosages (like antibiotics).
- Robinson (1983) & Miller (1983): These are refined versions of the Devine formula, developed to be more accurate for different body types based on newer data.
Limitations
None of these formulas account for body composition (muscle vs fat). A bodybuilder might be "overweight" according to these formulas despite having very low body fat. Always consider these numbers as a guideline, not a strict rule.
Use Cases
- Determine your ideal body weight before starting a fitness program
- Set realistic weight loss or weight gain goals
- Monitor progress toward a healthy BMI range
- Support medical, nutritional, or wellness planning
- Assist personal trainers and healthcare professionals in assessment
Benefits
- Provides a clear and evidence-based healthy weight range
- Uses multiple medically accepted formulas for better accuracy
- Quick and easy calculation based on height and gender
- Helps reduce health risks linked to overweight and obesity
- Supports long-term weight management and overall wellness
- Encourages realistic and sustainable fitness goals
Use this advanced Ideal Weight Calculator to calculate your healthy body weight, understand your BMI category, and take a confident step toward better health, balanced nutrition, and improved fitness.
Frequently Asked Questions
Find clear answers to common questions about this converter, accuracy, usage, and real-world applications.
What does the Ideal Weight Calculator actually show?
The Ideal Weight Calculator estimates your healthy weight range based on your gender, age, and height. It displays your recommended BMI range along with weight estimates calculated using established medical formulas such as Robinson, Miller, Devine, and Hamwi. This gives you both a range and specific reference values.
Is ideal weight the same for everyone of the same height?
No. While height plays a major role, gender, body composition, muscle mass, and age can influence what is considered an ideal or healthy weight. The calculator provides a structured estimate, but individual differences like bone density and fitness level should also be considered.
Why does the calculator use multiple formulas?
Different medical formulas were developed in different clinical settings. Using multiple ideal body weight formulas provides a broader and more realistic weight range rather than relying on a single number. This approach improves accuracy and helps users set flexible, achievable goals.
How does BMI relate to ideal body weight?
Body Mass Index (BMI) is a screening tool that compares your weight to your height. The calculator determines the weight range that falls within a healthy BMI category (18.5–24.9 for most adults). This helps identify whether you are underweight, normal weight, overweight, or obese.
Can athletes rely on this calculator?
Athletes and individuals with high muscle mass may weigh more due to lean tissue rather than body fat. While the calculator provides a useful reference point, highly muscular individuals should also consider body fat percentage and overall performance metrics when evaluating ideal weight.
Should I aim for the exact number shown in the formula?
No. The values shown are estimates, not strict targets. It is better to focus on staying within a healthy weight range while maintaining good energy levels, strength, and overall wellness. Sustainable progress is more important than hitting one exact number.
How often should I check my ideal weight?
You can revisit the calculator if your height measurement changes (for adolescents) or if you want to reassess your weight management goals. For most adults, ideal weight based on height remains stable, but lifestyle and health goals may evolve over time.
Why are there different formulas?
Different formulas were developed over time based on different population data. Devine is widely used for medication dosage. Robinson and Miller are modifications to better fit modern population statistics.
Which weight should I aim for?
The Healthy BMI Range (18.5 - 25) is the most medically accepted target for longevity and health. The specific formulas (like Robinson) usually fall within this range and give you a single "target" number based on averages.
Does age matter for ideal weight?
Technically, the traditional formulas (Devine, etc.) rely only on height. However, as people age, slightly higher muscle/bone density or weight distribution is common. The calculator focuses on height-based standards.
What if I am an athlete?
These calculators do not account for muscle mass. Athletes with high muscle density may weigh more than their "Ideal Weight" but still be very healthy. In such cases, Body Fat Percentage is a better metric.