What is the Ideal Weight Calculator?
Estimate ideal body weight with the Devine, Robinson, Miller and Hamwi formulas. The Devine, Robinson, Miller and Hamwi formulas were created for clinical use, such as medication dosing, so they give rough reference points rather than personal goals.
How to use the Ideal Weight Calculator
- Enter your sex, your height.
- Results update automatically as you type; you can also press Calculate.
- Read the output: devine, robinson, miller, hamwi.
- Use the 📊 chart to see the result visually, then copy or share it.
Formula and method
Worked example
With sex = Male, height = 175 cm, the Ideal Weight Calculator returns devine: 70.5 kg; robinson: 68.9 kg; miller: 68.7 kg.
Where the Ideal Weight Calculator helps in real life
You want a general idea of a healthy weight range for your height. Comparing four formulas side by side shows how much the estimates differ, which is a reminder that there is no single ideal number.
A nurse mentions ideal body weight when discussing a medication dose. This tool shows how that figure is calculated from height and sex.
Common mistakes to avoid
- Treating one formula’s result as a strict target.
- Ignoring muscle mass and frame size.
- Using the formulas for children or teenagers.
- Expecting the four formulas to agree.
💡 Practical tip: These formulas were designed for clinical calculations, so use them as rough references, not as personal targets.
Tips for better results
- Look at the spread across formulas rather than a single number.
- Use alongside BMI and waist measurements.
- Set personal goals with a healthcare professional.
⚠️ This tool provides general information and is not medical advice. It is not a substitute for diagnosis or treatment by a qualified healthcare professional.
Frequently asked questions
What does the Ideal Weight Calculator do?
Estimate ideal body weight with the Devine, Robinson, Miller and Hamwi formulas.
How is it calculated?
The Ideal Weight Calculator uses this method: Devine: 50 kg (men) / 45.5 kg (women) + 2.3 kg per inch over 5 ft.
Can you show an example?
With sex = Male, height = 175 cm, the Ideal Weight Calculator returns devine: 70.5 kg; robinson: 68.9 kg; miller: 68.7 kg.
Is the Ideal Weight Calculator accurate?
It uses standard published formulas and is tested against known values, but results are estimates for guidance. This tool provides general information and is not medical advice. It is not a substitute for diagnosis or treatment by a qualified healthcare professional.
Is this tool free and private?
Yes — the Ideal Weight Calculator is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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