Is there really one "ideal" weight?

No, healthy weight varies by frame size, muscle mass, age and overall health, so results should be treated as a general reference range.

Should I use this to set a weight loss goal?

It can be a helpful starting reference, but a doctor or dietitian can give a target accounting for your full health picture.

Ideal Weight Calculator

Q: Why do I get two different numbers?

The Devine formula gives a single reference figure while the BMI-based range shows the full span considered normal for your height.

Estimate a healthy target weight range for your height

Gender

Height

What is the Ideal Weight Calculator?

This calculator estimates a healthy target body weight using two established methods: the Devine formula (widely used in clinical settings, originally to calculate medication dosing) and a healthy weight range based on a normal BMI (18.5–24.9) for your height. Together they give a realistic target range rather than a single "perfect" number.

How to Use the Ideal Weight Calculator

Select your gender and choose metric or imperial units.
Enter your height.
Read both estimates — the Devine formula result and the healthy BMI-based range.

The Devine Formula

Men: Ideal Weight (kg) = 50 + 2.3 × (height in inches − 60)
Women: Ideal Weight (kg) = 45.5 + 2.3 × (height in inches − 60)

This formula was developed in 1974 for medical dosing calculations and has since become a common reference point for a "typical" healthy weight, though it doesn't account for body frame or muscle mass.

Frequently Asked Questions

Not really — healthy weight varies by frame size, muscle mass, age and overall health. Treat both results as a general reference range, not a strict target.

The Devine formula gives a single reference figure, while the BMI-based range shows the full span of weights considered "normal" BMI for your height. Both are estimates — if they differ, the BMI range is generally the more flexible guide.

It can be a helpful starting reference, but a doctor or dietitian can give you a target that accounts for your full health picture, not just height and gender.