Ideal Weight Calculator – Find Your Healthy Weight Range
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What Is Ideal Body Weight?
Ideal body weight (IBW) is an estimated healthy weight based mainly on your height and gender. It's commonly used by healthcare providers as a quick reference point — for example, when calculating medication dosages — rather than as a strict personal target, since it doesn't account for muscle mass or body frame size.
Formula Used (Devine Formula)
Men: IBW = 50 kg + 2.3 kg for each inch over 5 feet
Women: IBW = 45.5 kg + 2.3 kg for each inch over 5 feet
The Devine formula, originally developed for medical dosing calculations, is one of the most widely referenced methods for estimating ideal body weight and works well as a general benchmark for adults of average frame size.
How to Use This Calculator
Select your unit system and gender, enter your height, then click "Calculate Ideal Weight" to see your estimated healthy weight instantly.
Is Ideal Weight the Same for Everyone at a Given Height?
Not exactly — body frame size, muscle mass, and bone density all affect what's truly healthy for an individual. Someone with a larger frame or more muscle mass may naturally weigh more than the Devine estimate while still being perfectly healthy. Pair this result with our BMI Calculator and Body Fat Calculator for a fuller picture.
Frequently Asked Questions
Is the Devine formula accurate for everyone?
It's a solid general estimate for average body frames, but it doesn't account for muscle mass, so athletes and very muscular individuals may exceed it while still being healthy.
Does ideal weight change with age?
The Devine formula doesn't factor in age directly, though body composition naturally shifts as people get older, which can affect what's realistically healthy.
What if my actual weight is different from my ideal weight?
A difference doesn't automatically mean a health problem — it's a reference point, not a diagnosis. Check your BMI and body fat percentage for a more complete view.
Is this calculator suitable for children?
No, the Devine formula is designed for adults. Children require different growth-based reference charts.