Ideal Weight Calculator
See ideal weight estimates and your healthy BMI range.
Frequently Asked Questions
Why do the formulas give different answers?
Each formula was fitted to different population data. Devine (1974) came from drug dosing, Robinson (1983) and Miller (1983) refined it. Treat them as a range to aim within, not a single magic number.
What is the healthiest way to use this?
Use the healthy BMI range as the main guide and the formulas as cross-checks. Muscle mass, frame size and age all shift what is right for an individual, so discuss personal targets with a clinician.
Do these formulas work for children?
No. They were designed for adults over about 152 cm (5 feet). Children and teenagers are assessed with age- and sex-specific BMI percentiles instead of fixed adult formulas.
Is the Ideal Weight Calculator free, and is my data private?
Yes. It is completely free and every calculation runs locally in your browser, so the numbers and dates you enter are never uploaded, stored, or shared with anyone.
Related Tools
BMI Calculator
Calculate Body Mass Index and understand your health status.
Body Fat Calculator
Estimate body fat percentage with the US Navy tape measure method using neck, waist, hip and height measurements, plus fat mass and lean mass results.
Calorie Calculator
Calculate daily calorie needs with the Mifflin-St Jeor equation, activity multipliers and goal targets for losing, maintaining or gaining weight.
Water Intake Calculator
Calculate your recommended daily water intake from body weight, exercise time and climate, shown in litres, millilitres and glasses per day easily.