Calculate your ideal body weight using four proven formulas plus your healthy BMI weight range, adjusted for your height, gender and body frame.
Enter your height, gender, age and body frame size.
Instantly calculate your ideal weight using four established formulas.
See your ideal weight, healthy BMI range and a frame-adjusted target.
An Ideal Weight Calculator estimates a healthy target body weight based on your height and gender. This calculator uses four widely referenced formulas, the Devine, Robinson, Miller and Hamwi equations, then averages the results and adjusts for your body frame size to give a practical target range.
Alongside the formula-based estimate, this calculator also shows your healthy BMI weight range, giving you two independent reference points to consider together rather than a single rigid number.
Each formula was developed at a different time for different clinical purposes, most originally for medication dosing, and each produces a slightly different estimate. Averaging them smooths out individual quirks and gives a more balanced target than relying on any single formula alone.
| Formula | Year | Base Calculation |
|---|---|---|
| Devine | 1974 | 50/45.5 kg + 2.3 kg per inch over 5 ft |
| Robinson | 1983 | 52/49 kg + 1.9/1.7 kg per inch over 5 ft |
| Miller | 1983 | 56.2/53.1 kg + 1.41/1.36 kg per inch over 5 ft |
| Hamwi | 1964 | 48/45.5 kg + 2.7/2.2 kg per inch over 5 ft |
This Ideal Weight Calculator provides an estimate based on the information you enter and standard reference formulas. Individual healthy weight ranges can vary due to muscle mass, bone density, genetics and medical conditions. Please consult a qualified healthcare professional before making significant changes to your diet or weight goals.
An Ideal Weight Calculator estimates a healthy target body weight based on your height, gender and body frame using established reference formulas.
No single formula is universally most accurate. Averaging the Devine, Robinson, Miller and Hamwi formulas gives a more balanced estimate than relying on just one.
People with larger bone structure and frame size naturally carry more healthy weight than the base formulas assume, so this calculator adjusts the estimate up or down accordingly.
A BMI calculator classifies your current weight into a category, while this calculator estimates a target weight in kilograms or pounds using height-based formulas alongside the healthy BMI range.
Yes. This calculator is completely free and works on desktop, tablet and mobile devices.
Discover free calculators for calories, TDEE, BMR, BMI, macros, hydration, ideal weight and many more health and fitness planning tools.
Browse All Health Calculators →