⚖️ Ideal Weight Calculator

Compare four established height-based ideal-body-weight reference formulas.

Try the calculator

The values below are a working example. Change any field to recalculate instantly in your browser.

ESTIMATED IDEAL WEIGHT70 kg
Devine Formula70.5 kg
Robinson Formula68.9 kg
Miller Formula68.7 kg
Hamwi Formula72 kg

Ideal-weight formulas are broad references, not personal medical targets.

Formula & Mathematical Logic

Base weight + coefficient × inches above 5 feet

Each formula uses a different base weight and coefficient, so the results are best read as a broad reference range. Calculations run locally in your browser.

Worked Example

At 175 cm, the four methods return nearby but different reference weights rather than one medically exact target.

Frequently Asked Questions

How is this result calculated?

The calculator applies the Devine, Robinson, Miller, and Hamwi formulas and displays their average.

Does Calcixa upload my inputs?

No. Inputs and results remain in your browser and are not sent to a Calcixa server.

CALCIXA PRACTICAL GUIDE

How to use the Ideal Weight Calculator

Ideal-weight equations provide reference values based mainly on height and sex. They were developed for specific historical purposes and do not define a uniquely healthy, attractive, or appropriate weight for an individual.

A useful personal range depends on body composition, frame, age, medical history, pregnancy, disability, ethnicity, fitness, and sustainable behaviours. Use the displayed formulas as comparisons, not targets that override professional advice.

Step-by-step

  1. Enter height and the input required by the selected equations.
  2. Calculate the several formula estimates rather than focusing on one.
  3. Notice the spread between results as evidence of model uncertainty.
  4. Discuss weight concerns with a clinician who can consider health markers and personal context.

How to read the result

  • Each formula produces a height-based reference estimate.
  • The average summarizes formulas but does not make them clinically exact.
  • Differences arise because equations were created from different assumptions and populations.

Common mistakes to avoid

  • Treating one number as mandatory.
  • Using adult equations for children or pregnancy.
  • Ignoring muscle mass, health history, and sustainable lifestyle.

Important: This educational estimate is not medical advice or a diagnosis.

More questions about Ideal Weight Calculator

Why are there several answers?

There is no universal ideal-weight formula; each equation uses a different historical model.

Is the average the healthiest weight?

Not necessarily. Health cannot be determined from a height-based average alone.

Can I use this to set a rapid-loss target?

No. Weight-change planning should be safe, gradual, and individualized with professional support when needed.

Sources and methodology

Calcixa explains the model, assumptions, and limitations so you can verify the result. See our calculation and tool methodology for rounding, privacy, testing, and correction practices.

Maintained by the Calcixa product team. This page was last updated on 7 September 2026.