Toolkit ShelfHealth Calculators
Use this ideal weight calculator to compare four published adult reference formulas by height and formula reference, with a separate BMI screening range for context.
Live calculator
Spread across four historical equations; it is context, not one personal target.
Separate adult BMI 18.5 to 24.9 screening range for this height.
Calculated from 70 in / 177.8 cm and current weight.
Devine, Robinson, Miller, and Hamwi are historical adult equations that use the selected male reference coefficients and height. They do not measure body fat, muscle mass, pregnancy, health status, or an individual target weight.
Published male reference equations shown side by side.
| Formula | Reference estimate | Published equation |
|---|---|---|
| Devine (1974) | 161 lb | 50 kg + 2.3 kg x (inches - 60) |
| Robinson (1983) | 157 lb | 52 kg + 1.9 kg x (inches - 60) |
| Miller (1983) | 155 lb | 56.2 kg + 1.41 kg x (inches - 60) |
| Hamwi (1964) | 166 lb | 106 lb + 6 lb x (inches - 60) |
Use this as a planning estimate, not medical advice. Medical conditions, medication, pregnancy, eating disorder history, or disease-specific nutrition needs should be handled with a qualified professional.
Quick answer
Ideal Weight Calculator calculates formula reference range from height, formula reference, current weight (optional), and unit system. The visible formula is Devine, Robinson, and Miller: base kg + kg per inch x (height in inches - 60); Hamwi: base lb + lb per inch x (height in inches - 60).
Formula
Devine, Robinson, and Miller: base kg + kg per inch x (height in inches - 60); Hamwi: base lb + lb per inch x (height in inches - 60)The calculator shows four published adult equations side by side and separately derives a BMI 18.5 to 24.9 range. Neither is an individualized target or diagnosis.
How to use
Example
Calculator use
Before relying on it
Details
Children and teens use age- and sex-specific growth references, not these adult formula or BMI comparisons.
Devine, Robinson, Miller, and Hamwi were developed in different eras and produce different values at the same height.
The equations use sex-specific coefficients from their source material. They do not define identity, body composition, or a personal health target.
Source notes
Benchmarks
The visible spread is more honest than treating the mean of four historical equations as a personal goal.
BMI provides a different height-and-weight context and does not validate one formula as correct.
For medication, nutrition, ventilation, or other clinical work, follow the protocol and qualified clinician rather than this general reference tool.
Calculator accuracy
Devine, Robinson, and Miller: base kg + kg per inch x (height in inches - 60); Hamwi: base lb + lb per inch x (height in inches - 60)
Height, Formula reference, Current weight (optional), Unit system
Health results are screening or planning estimates. Age, body composition, medication, medical history, pregnancy, and professional guidance can change the right interpretation.
Method and sources checked on July 28, 2026. The documented method, source timing, validity conditions, and reliance limits were checked on this date.
Toolkit Shelf. Ideal Weight Calculator. https://toolkitshelf.com/tools/ideal-weight-calculator
FAQ
This calculator converts the entered height to inches and applies Devine, Robinson, Miller, and Hamwi adult reference equations. It also shows a separate BMI 18.5 to 24.9 range for the same height.
There is no universally best formula for a person. The equations were developed from different historical datasets and purposes, so this tool shows the spread rather than calling one result the answer.
The published equations use different female and male coefficients. That selection only chooses the historical equation variant; it is not a statement about identity or a personalized health recommendation.
BMI divides current weight by height squared and places the result in a broad adult screening category. Ideal body weight equations estimate one height-based reference value per formula, so the two methods can disagree.
No. Some protocols name a specific weight equation, but medication, nutrition, ventilation, pregnancy, and treatment decisions need the applicable protocol and qualified clinical judgment.
No. This page is for adults. Children and teens need age- and sex-specific growth references and clinical interpretation.
Page feedback
A one-click answer helps prioritize corrections and improvements. No calculator input or result is included.
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