What is 'ideal' weight?
There is no single perfect weight for a given height — a healthy weight is a range. This calculator gives you two views. The first is the range that corresponds to a normal BMI (18.5 to 24.9) for your height. The second is a single number from the Devine formula, an older clinical estimate originally used for medication dosing that is still a handy reference point.
How to read the result
The BMI-based range is the most useful for everyday purposes: any weight inside it is generally considered healthy for your height. The Devine figure sits within that range and gives you a rough mid-target if you prefer a single number. Neither accounts for muscle mass, frame size or body composition, so treat them as guides rather than strict goals.
Things to keep in mind
- Muscular people may sit above the range while being perfectly healthy.
- Frame size and age shift what's realistic for you.
- Sustainable habits matter more than hitting an exact number.
- For personalised targets, ask a doctor or dietitian.
Frequently asked questions
Why a range, not one number?
Because health spans a band of weights for any height. The BMI range reflects that.
What is the Devine formula?
A clinical estimate of ideal body weight from height and sex, widely used as a reference.
Is my data private?
Yes — everything is calculated in your browser.