Calculator
This gives a formula-based ideal weight estimate. Formulas like Devine, Robinson, and Hamwi were originally developed for medical dosing purposes and estimate a single reference weight from height and sex, which is why results are usually shown as a range rather than one fixed number. Body composition, frame size, muscle mass, and age all affect what a genuinely healthy weight looks like for a given person, so treat the output as a rough starting point for conversation rather than a target to chase exactly.
✓ Accurate formulas
✓ Save and reload
✓ Free to use
This calculator is for educational use only and does not replace medical advice, diagnosis, or treatment. Check with a qualified clinician before making health, nutrition, training, or pregnancy-related decisions.
Last updated: April 19, 2026
What to do next
- Use the result as rough context only.
- Pair it with body composition, fitness, and health markers.
- Avoid crash diets to chase a formula.
- Focus on sustainable habits.
- Discuss weight goals with a qualified professional if needed.
Frequently Asked Questions
Is there one true ideal weight?
No. Healthy body weight depends on many factors beyond a formula.
Why use a range?
A range is more realistic than pretending one exact number defines health.
Can athletes exceed the estimate?
Absolutely. Muscle mass changes the picture.
Should I chase this exact number?
Not necessarily. Context matters more than perfection.
Why include sex?
Traditional formulas use different constants by sex.
Can this replace medical advice?
No.
About the Ideal Weight Calculator
This gives a formula-based ideal weight estimate. Formulas like Devine, Robinson, and Hamwi were originally developed for medical dosing purposes and. Instead of estimating or hunting for a formula online, Ideal Weight Calculator does the calculation instantly, right in your browser.
You'll enter Height, Sex, Formula estimate, Flexible range and Important note, and the calculator handles the rest.
How to Use It
Getting your number takes just a few steps:
- Enter height.
- Add sex, formula estimate, flexible range, important note.
- Review the result — adjust any field to see it update live.
Who This Is For
People turn to this calculator when they need a fast, dependable number instead of estimating — whether that's for a one-off decision or something they check regularly.
This page also answers common questions like "Is there one true ideal weight?" and "Can this replace medical advice?" — see the FAQ section above for details.
Good to Know
Does it store my information? No. The calculation happens in your browser and nothing you enter is saved or sent anywhere.
Is there a cost to use this? No — every calculator on Zaculators is free, with no account or sign-up needed.
How accurate is this? Results depend on standard, widely used formulas for this kind of calculation — accuracy is only as good as the numbers you put in, so it's worth double-checking your inputs.
A Note on Precision
Small changes in your inputs can shift the result more than you'd expect, so it's worth running the numbers more than once if you're using this for something important. Treat the output as a strong estimate built on the figures you provide, not a substitute for professional advice where real money or decisions are on the line.
Explore More
Zaculators has 250+ free calculators spanning finance, business, health, tax, and everyday planning. Browse the full calculator directory if Ideal Weight isn't quite the tool you're after.