Which ideal weight formula is most accurate?

No single formula is universally best. The Devine formula is the oldest and most widely cited in clinical settings. Robinson and Miller provide modest refinements. Hamwi is commonly used in nutrition practice. Using all four together gives a practical range rather than a single fixed number.

What is the BMI healthy weight range?

The BMI healthy weight range corresponds to a Body Mass Index between 18.5 and 24.9. The lower bound is weight (kg) = 18.5 × height² (m²) and the upper bound is weight (kg) = 24.9 × height² (m²).

Do these formulas account for muscle mass or age?

No. The classic formulas (Devine, Robinson, Miller, Hamwi) are based only on height and sex. They do not account for muscle mass, bone density, age, or body frame. Use them as rough estimates and consult a healthcare provider for personalized advice.

What if my height is under 5 feet (152 cm)?

The Devine, Robinson, Miller, and Hamwi formulas were derived from populations with heights at or above 5 feet. Results for shorter individuals may be less reliable. The BMI range remains valid at any height.

Is ideal weight the same as healthy weight?

Not exactly. "Ideal weight" from these formulas is a population-derived estimate. "Healthy weight" typically refers to the BMI 18.5–24.9 range. Both are useful reference points, but individual health depends on many other factors including muscle mass, cardiovascular fitness, and metabolic markers.

Ideal Weight Calculator

Enter your height and sex to see your ideal weight from four medical formulas and the BMI-based healthy range.

Your Measurements

Height

Sex

Male Female

Display unit

Enter your height and sex, then click Calculate.

Results from four medical formulas will appear here.

Summary

Enter your height and sex to see your ideal weight from four medical formulas and the BMI-based healthy range.

How it works

Enter your height in cm or switch to feet and inches.
Select your sex (Male or Female).
Choose whether to display results in kg or lb.
Click Calculate — your ideal weight appears instantly from four formulas and the BMI range.
Click Reset to start over.

Use cases

Set a realistic target weight for a diet or fitness program.
Compare estimates from multiple widely used clinical formulas.
Find the BMI-based healthy weight range for your height.
Cross-check your current weight against ideal-weight benchmarks.

Frequently Asked Questions

Last updated: 2026-09-22 · Reviewed by Nham Vu