How this calculator works
These height-based equations arose in clinical and population-reference settings and do not measure body composition or health. This comparison is restricted to heights at or above 5 ft, avoiding extrapolation below their usual baseline. Sex-specific coefficients follow the original equations; estimates must not be used to set medication doses.
The formula
Let h = height in inches − 60.
Devine (kg): male 50 + 2.3h; female 45.5 + 2.3h
Robinson (kg): male 52 + 1.9h; female 49 + 1.7h
Miller (kg): male 56.2 + 1.41h; female 53.1 + 1.36h
Hamwi (lb): male 106 + 6h; female 100 + 5h; multiply by 0.45359237 for kg.A quick example
At 5 ft (152.4 cm), the male equations give Devine 50.0 kg, Robinson 52.0 kg, Miller 56.2 kg and Hamwi approximately 48.1 kg.
How to use this calculator
- Enter height of at least 152.4 cm.
- Choose the sex coefficient used by the historical formulas.
- Compare the estimates without treating any value as a personal target.
A few common questions
Which estimate is medically ideal?
None is a universal personal ideal. Health and suitable weight vary with individual circumstances.
Why are the formulas different?
They use different historical assumptions, datasets and coefficients.
Can I use this for children or dosing?
No. This informational comparison is not a pediatric growth assessment or medication-dosing tool.
Reference: Peterson et al. (2016), comparison of reference-weight equations