⚖️ Ideal Weight Calculator

Find your ideal weight using four medically recognised formulas. Metric and imperial supported.

⚖️ Ideal Weight Calculator

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Related Guide
Ideal Weight Formulas Explained (Devine, Robinson, Miller, Hamwi)
Where these formulas came from, and why they're guides, not targets.
Read Article →

What is the Ideal Weight Calculator?

The Ideal Weight Calculator estimates a healthy target weight range from your height and sex using four established clinical formulas: Devine, Robinson, Miller, and Hamwi. Enter your height, sex, and current weight, and it returns each formula's estimate along with an average, so you can compare your current weight to a research-based range instead of a single number.

How to Use It

Enter your height in centimeters, select male or female, and enter your current weight in kilograms, then press Calculate. The results show the ideal weight predicted by each of the four formulas plus the average of all four, alongside your current weight in both kilograms and pounds for easy comparison.

When to Use It

Use it when setting a realistic weight goal, checking how your current weight compares to commonly used clinical reference ranges, or discussing medication dosing benchmarks (several of these formulas were originally developed for that purpose) with a healthcare provider. It's a starting point for conversation, not a diagnosis.

Who Benefits

Anyone starting a weight management plan, athletes and trainers setting benchmarks, and patients preparing questions for a doctor's visit can use it to see a range rather than fixating on one target. Because the four formulas differ, especially for taller or shorter people, use the spread between them as a sanity check.

Formula Reference

FormulaMale Base (5ft/152cm)Per Inch/2.5cm
Devine (1974)50 kg+2.3 kg
Robinson (1983)52 kg+1.9 kg
Miller (1983)56.2 kg+1.41 kg
Hamwi (1964)48 kg+2.7 kg
⚠️ Ideal weight is highly individual. Athletic builds may exceed these ranges while remaining healthy. Consult a healthcare provider for personal advice.

Frequently Asked Questions

This calculator uses four established medical formulas: Devine (1974, commonly used in drug dosing), Robinson (1983), Miller (1983), and Hamwi (1964). Each gives a slightly different result — the range they span gives you a practical target zone.
No. Ideal weight varies based on body frame size, muscle mass, age, and individual health factors. The formulas give estimates based on height and sex. A healthy weight range is more useful than a single target number.
These formulas were designed for adults and don't adjust for age. In practice, some doctors allow for slightly higher weight in older adults, as being slightly overweight can be protective against bone loss and illness recovery.