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Ideal Weight Calculator

Compare Devine, Robinson and Miller adult reference-weight formulas and a separate BMI screening interval without prescribing a target.

Use this result well

Inputs that matter
Adult height at least 5 ft (152.4 cm) and the published male-constant or female-constant historical formula set
Output to expect
Separate Devine, Robinson and Miller estimates, their observed span, and a separately labeled adult BMI screening interval
How it works
Applies each historical height-based formula independently and preserves disagreement; it does not average the equations into an “ideal” or target weight
  • Do not use these values for medication, ventilation, nutrition or other clinical dosing; use the exact protocol and qualified clinician/pharmacist guidance.
  • Body composition, health history, pregnancy, age, disability, athletic build and clinical findings are outside the formulas; use BMI only as one adult screening measure.

Choose your path

Built around the job you need to finish

Compare three historical adult height-based reference-weight formulas and a separate BMI screening interval without prescribing a target, averaging unlike methods or enabling clinical dosing.

Adult comparing historical formula outputs

See formula disagreement instead of one authoritative “ideal.”

Enter adult height and the published constant set, then inspect each estimate and span.

Understands that the range is disagreement among models, not a recommended goal.

Athlete or adult with atypical body composition

Avoid interpreting height-only formulas as body composition or health.

Review the BMI/formula limitations and use qualified assessment if needed.

Does not change weight solely from the calculator.

Clinician, pharmacist or caregiver considering dosing

Avoid applying a generic web equation to medication or ventilation.

Use the exact clinical protocol, current measurements and qualified guidance outside the tool.

Never copies the result into a clinical dose.

Authoritative checks for this tool

Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.

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Reference & details

How it works

Historical formula comparison

Devine, Robinson and Miller use different published constants and coefficients for inches above 5 ft. The calculator shows each result and their span instead of treating one or their average as a personal ideal.

reference kg = published base constant + coefficient × inches above 60

Supported adult height boundary

Published discussions note that many historical formulas are recommended only above 5 ft. The calculator therefore rejects heights below 152.4 cm rather than extrapolating an unsupported line.

Separate BMI screening interval

The 18.5–24.9 adult BMI interval is calculated independently from height. CDC describes BMI as one screening measure to consider with exam, laboratory, behavior and other factors—not a diagnosis or target.

screening weight = BMI × height² (m²)

Updated: August 2026

Example Scenarios

An adult selects the published male constants and records each historical estimate plus the observed span, without turning the span into a target.

An athlete sees that height-only formulas and BMI do not measure muscle, fat, bone, health history or individualized goals and seeks appropriate assessment.

A pharmacist or clinician does not copy a web result into medication or ventilation dosing and instead follows the exact current clinical protocol.

Common Mistakes to Avoid

Averaging different formulas into one recommended goal

Keep Devine, Robinson and Miller separate. Their disagreement demonstrates model dependence and does not define a personal target.

Using the result for medication dosing or as a health diagnosis

Use the exact clinical protocol and qualified guidance for dosing. BMI and height-only formulas do not replace a full health assessment.

FAQ

Devine, Robinson and Miller use different historical constants and coefficients, so they produce different values. The span reports that disagreement; it is not a recommended range.

These linear formulas are written around inches above 5 ft, and published comparisons note that many are recommended only above that point. The tool avoids unsupported downward extrapolation.

It selects the binary male or female constants published in the historical equations. It does not measure gender identity, body composition, hormones or individualized health.

No. CDC describes adult BMI as a screening measure that should be considered with other clinical and health factors. The interval is mathematical context, not individualized advice.

No. Drug and ventilation protocols can require specific weight descriptors, current measurements and clinical judgment. Follow the exact protocol and qualified clinician or pharmacist guidance.

About Ideal Weight Calculator

Compare three historical adult height-based reference formulas and a separately labeled BMI screening interval. The tool preserves model disagreement and does not prescribe an ideal, goal, dose, or diagnosis.