What are the 4 main clinical formulas for Ideal Body Weight?

The 4 recognized formulas are: Devine (1974), Robinson (1983), Miller (1983), and Hamwi (1964). They establish baseline weights at 5 feet tall and add incremental weight per inch above 5 feet.

How does body frame size influence ideal body weight?

A small frame size reduces ideal weight by ~10%, while a large frame size increases ideal weight by ~10% due to differences in bone density and wrist circumference.

What is the Hamwi formula for ideal body weight?

Men: 106 lbs for first 5 feet + 6 lbs per inch above 5 feet. Women: 100 lbs for first 5 feet + 5 lbs per inch above 5 feet.

Why is ideal body weight a range rather than a single number?

Because human variation in muscle mass, bone structure, and genetics means individuals of identical height can be completely healthy at various weight points within the normal BMI range.

Where is the Devine IBW formula used clinically?

Physicians and pharmacists use Devine IBW to calculate precise pharmaceutical dosages for hydrophilic medications (like aminoglycosides) and mechanical ventilator tidal volumes.

Which clinical formulas are used to estimate Ideal Body Weight (IBW)?

This calculator calculates IBW across the four primary medical benchmarks: Devine (1974), Robinson (1983), Miller (1983), and Hamwi (1964) formulas.

Health & Fitness Cluster

Ideal Body Weight Calculator (Devine, Robinson & Hamwi Formulas)

Calculate clinical ideal body weight (IBW) ranges based on height, gender, and medical formulas.

TL;DR: Ideal Body Weight Calculator computes optimal body weight ranges using 4 recognized medical formulas (Devine, Robinson, Miller, Hamwi) and standard BMI thresholds.

Sex

Height (feet)

Height (inches)

What Is the Devine Formula for Ideal Body Weight (IBW)?

The Devine formula is the most widely used medical standard for calculating Ideal Body Weight (IBW): For Men: IBW (kg) = 50 + 2.3 × (height in inches - 60); For Women: IBW (kg) = 45.5 + 2.3 × (height in inches - 60). It is routinely used in clinical medicine for drug dosing and ventilator settings.

How to Use the Ideal Body Weight Calculator

Our Ideal Body Weight Calculator performs high-precision mathematical operations directly in your browser with zero latency and complete client-side privacy.

Select Gender (Male or Female) and enter your current Age.
Input your exact Height in feet/inches or centimeters.
Optionally select your Body Frame Size (Small, Medium, or Large).
Click 'Calculate Ideal Weight' to compute results across all 4 formulas.
Review the consensus weight range alongside the healthy BMI (18.5–24.9) range.

Mathematical Formula & Equations

Calculates clinically healthy ideal weight ranges using Devine, Robinson, Miller, and Hamwi medical equations.

\[ \text{Devine Formula: Men: } 50\text{kg} + 2.3(H - 60\text{ in}), \quad \text{Women: } 45.5\text{kg} + 2.3(H - 60\text{ in}) \]

Calculation Example

For a 5 ft 10 in (70 inches) male: Devine IBW = $50 + 2.3(10) = 73\text{ kg}$ (161 lbs), with healthy BMI range 130–174 lbs.

100% Client-Side Privacy & Data Security

All calculations, amortization schedules, variables, and sensitive numerical datasets execute 100% locally in your web browser memory. Your financial, medical, and personal values are never transmitted, logged, or uploaded to any external server.

Frequently Asked Questions

: The 4 recognized formulas are: Devine (1974), Robinson (1983), Miller (1983), and Hamwi (1964). They establish baseline weights at 5 feet tall and add incremental weight per inch above 5 feet.
: A small frame size reduces ideal weight by ~10%, while a large frame size increases ideal weight by ~10% due to differences in bone density and wrist circumference.
: Men: 106 lbs for first 5 feet + 6 lbs per inch above 5 feet. Women: 100 lbs for first 5 feet + 5 lbs per inch above 5 feet.
: Because human variation in muscle mass, bone structure, and genetics means individuals of identical height can be completely healthy at various weight points within the normal BMI range.
: Physicians and pharmacists use Devine IBW to calculate precise pharmaceutical dosages for hydrophilic medications (like aminoglycosides) and mechanical ventilator tidal volumes.
: This calculator calculates IBW across the four primary medical benchmarks: Devine (1974), Robinson (1983), Miller (1983), and Hamwi (1964) formulas.

Cite This Calculator

Need to reference this online calculator in a financial proposal, academic paper, blog post, or classroom curriculum? Copy a citation below.

NexLove.org. (2026). Ideal Body Weight Calculator [Online Calculation Tool]. https://nexlove.org/tools/ideal-body-weight-calculator

“Ideal Body Weight Calculator.” NexLove.org, 2026, nexlove.org/tools/ideal-body-weight-calculator.

NexLove.org (2026) Ideal Body Weight Calculator. Available at: https://nexlove.org/tools/ideal-body-weight-calculator (Accessed: 2026).

@misc{nexlove_ideal_body_weight_calculator,
  title = {Ideal Body Weight Calculator},
  author = {{NexLove.org}},
  year = {2026},
  url = {https://nexlove.org/tools/ideal-body-weight-calculator}
}

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