Ideal Weight Calculator
Find your ideal body weight (Robinson, Devine, Hamwi).
✓ Professional standard Uses internationally recognised clinical formulas — WHO, NHS, CDC, the U.S. Navy method and Mifflin-St Jeor — for screening-grade estimates.
Ideal Weight Calculator is a free online medical & health tool from Toolinza. Find your ideal body weight (Robinson, Devine, Hamwi). It runs entirely in your browser — your data is never uploaded — needs no signup, and works on any device. Toolinza offers 293+ free tools used by people across the UK, USA, Canada, Australia, the EU, India, Pakistan, the Middle East and worldwide.
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About the Ideal Weight Calculator
"What should I weigh?" is one of the most common health questions, and there is no single answer — which is exactly why several respected formulas exist. Seeing them side by side gives you a sensible target range rather than one arbitrary number.
This Ideal Weight Calculator shows your ideal body weight using the Robinson, Devine and Hamwi formulas, based on your height and sex, so you get a realistic range to aim for.
How to use the Ideal Weight Calculator
- Select your sex.
- Enter your height.
- Choose metric or imperial units.
- See your ideal weight across the Robinson, Devine and Hamwi formulas.
Key features of the Ideal Weight Calculator
- Robinson, Devine and Hamwi formulas
- Gives a realistic target range, not one number
- Based on height and sex
- Metric and imperial units
- Private — calculated in your browser
How the Ideal Weight Calculator works
This calculator applies standard, peer-reviewed formulas used by health professionals and public-health bodies worldwide. Depending on the metric, that includes the World Health Organization (WHO) classification, NHS and CDC guidance, the Mifflin-St Jeor equation for metabolic rate, and the U.S. Navy method for body composition. Inputs are converted between metric and imperial units using exact factors so results are consistent whichever system you use.
All calculations are performed in your browser, so the health information you enter is never sent anywhere.
Tips & best practices
- Treat the result as a range, not a hard target — the formulas differ, and a healthy weight depends on build and muscle too.
- Read it alongside BMI and body composition rather than chasing a single figure.
- For a personalised goal, a healthcare professional can factor in your frame, muscle mass and health history.
Standards & accuracy
Uses internationally recognised clinical formulas — WHO, NHS, CDC, the U.S. Navy method and Mifflin-St Jeor — for screening-grade estimates.
Important: these tools provide screening-grade estimates for general information and education only. They are not a medical diagnosis and do not replace professional advice. Always consult a qualified healthcare provider before making health decisions.
Who uses the Ideal Weight Calculator?
- Setting a realistic weight goal
- Comparing common ideal-weight formulas
- A reference point alongside BMI
- Health and fitness planning
Privacy & security
The Ideal Weight Calculator runs entirely inside your web browser. Your data — whether that is a file, figures or text — is processed on your own device and is never uploaded to a server, stored or shared. There is no signup and no account, so you can use it as often as you like while keeping full control of your information. This makes it a safe choice even for confidential and sensitive work.
Why choose Toolinza?
- 100% free — no hidden charges, watermarks or usage caps.
- Private & secure — your data stays on your device.
- Standards-compliant — accurate results suitable for the UK, USA, Canada, Australia, EU, India, Pakistan, the Middle East and worldwide.
- Works everywhere — desktop, tablet and mobile.
Frequently asked questions
No single formula is definitively best — that is why the calculator shows Robinson, Devine and Hamwi together, giving you a sensible range rather than one arbitrary figure.
Not exactly. Ideal-weight formulas give a reference based on height and sex, but a healthy weight also depends on your build, muscle and overall health, so use it as a guide.
No. Aim for the range and combine it with how you feel, your BMI and body composition. For a personalised target, consult a professional.
Yes. The Ideal Weight Calculator is completely free with no signup, no watermarks and no usage limits. Toolinza is supported by unobtrusive advertising so every tool stays free.
Absolutely. This tool runs entirely in your browser — your data and files are never uploaded to any server, so everything stays private on your own device.
No. The Ideal Weight Calculator works instantly in any modern web browser on desktop, tablet and mobile — Windows, macOS, Linux, Android and iOS.