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Ideal Weight Calculator - 2026 Edition

Use clinical formulas like Devine and Robinson to determine your ideal health target. Understand the difference between "ideal weight" and a "healthy weight range" for your specific height.

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* Disclaimer: Ideal weight formulas are for clinical reference. Genetic factors and muscle mass influence individual targets.

Standards: Devine, Robinson, Miller, Hamwi Formulas

Updated: Jan 2026 | Build v2.1.0

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⚖️BMI Hub📊Body Fat %🍎Calorie Goal📏WHR Risk

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Enter your height and weight parameters to generate
a personalized ideal health weight profile.

Did You Know?

#1Ideal weight formulas were originally created for drug dosage (Devine 1974).

#2Muscle is 15-20% denser than fat, which these clinical formulas do not account for.

#3Robinson and Miller formulas were created to improve accuracy over the original Devine method.

#4'Healthy weight' is a broad range (BMI 18.5-24.9), whereas 'Ideal weight' is a single clinical target.

#5Body frame size and genetics play a major role in your actual ideal weight.

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BMI HubBody Fat %Calorie GoalWHR Risk

What is Ideal Body Weight (IBW)?

Ideal Body Weight is a clinical estimate of how much an individual should weigh based on their height and gender. While it doesn't account for muscle mass or bone density perfectly, it provides a crucial baseline for dosage calculations in medicine and general health goal setting.

The Four Main Formulas

  • Devine Formula: The clinical gold standard for medical dosing and lung protection.
  • Robinson Formula: An improved version of Devine for better accuracy in modern populations.
  • Miller Formula: Often provides the most conservative "lean" estimates.
  • Hamwi Formula: Popular among nutritionists for its simplicity and frame-size flexibility.

Why a Healthy Range Matters

Health professionals usually look at the "Healthy Weight Range" corresponding to a **BMI of 18.5 to 24.9**. This allows for natural variations in:

Bone Structure

Heavier bones can add 2-4kg to your frame without increasing fat mass.

Muscle Density

Muscle is more compact than fat; active users may weigh more but be metabolically leaner.

Clinical Limitations

Ideal body weight formulas are primarily height-based. They do not distinguish between lean muscle mass and adipose tissue (fat). Consequently, these formulas may categorize athletes or bodybuilders as being "above ideal weight" despite having very low body fat and excellent metabolic health.

↗ Cross-Reference

For a more holistic health assessment, use:

📊 BMI Calculator📉 Body Fat %⚡ BMR Baseline

Frequently Asked Questions

No. Formulas primarily use height and gender. Athletes with high muscle mass will often weigh significantly more than their 'ideal' clinical weight while remaining healthy.
The Devine formula is the medical gold standard, while Robinson and Miller often provide better estimates for modern general populations.
These formulas don't account for age directly, but since BMR drops with age, maintaining a weight near the lower end of the IBW range becomes progressively harder.
Yes. Bone structure can vary weights by 5-10%. The Hamwi formula is often used by practitioners to adjust for frame size by adding or subtracting 10% from the result.

Clinical Reference

Standardized Clinical Formulas: Devine (1974), Robinson (1983)

Editorial Status

Last Updated: January 2026 | Reviewed for Clinical Consistency