# Compare a Weight with an Adult BMI Reference

> Show the arithmetic difference from the tool’s stated adult BMI reference, without prescribing weight change.

Page: https://askcalculators.com/health/overweight/
Definition: https://askcalculators.com/health/overweight/definition.json
JSON Schema: https://askcalculators.com/health/overweight/schema.json
Version: 20.13.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/health/overweight/?heightFt=5&heightIn=8&weight=185

## Inputs
- heightFt: Height (ft); type=number; optional; default=5
- heightIn: Height (in); type=number; optional; default=10
- weight: Weight (lbs); type=number; optional; default=200

## Outputs
- bmi: Adult BMI screening value; format=number; primary
- referenceWeight: Weight at the 24.9 screening boundary (lb); format=number
- aboveReference: Amount above this boundary, not a target (lb); format=number

## Formula
BMI = 703 × pounds / inches²; reference pounds = 24.9 × inches² / 703.

Use this only as an explanation of a screening formula. It does not measure body composition, diagnose a condition or prescribe weight loss. Seek qualified guidance for personal health decisions.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.