Ideal Weight Calculator

Sex

Height Unit

Height (cm)Enter a valid height.

Estimated Ideal Weight

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How to Use This Tool

Select your sex and preferred height unit.
Enter your height.
Click Calculate Ideal Weight for your estimate.

The Devine Formula

Men: Ideal Weight (kg) = 50 + 2.3 × (height in inches over 5 feet)

Women: Ideal Weight (kg) = 45.5 + 2.3 × (height in inches over 5 feet)

Where This Formula Came From

The Devine formula was originally developed in 1974 to help calculate appropriate medication dosages based on body weight, not as a fitness or wellness benchmark. It has since become widely (if somewhat informally) adopted as a general reference for "ideal" body weight.

Important Limitations

This formula considers only height and sex — it doesn't account for body frame size, muscle mass, or individual body composition. A muscular, athletic person will often naturally weigh more than their "ideal weight" by this formula while still being at a healthy body fat percentage. Use this as one general reference point, not a strict target, and consider it alongside other measures like BMI or body fat percentage.

Other Similar Formulas

Other formulas exist (Robinson, Miller, Hamwi) that produce slightly different results using similar height-based logic — none is definitively "more correct" than the others, as ideal weight is inherently an approximation.

Frequently Asked Questions

Is the Devine formula the "correct" ideal weight for me?

It's one commonly used reference point, originally designed for medical dosing purposes, not a definitive fitness target. It doesn't account for muscle mass or body frame, so treat it as a general guideline rather than a strict goal.

Why do different ideal weight formulas give different results?

Formulas like Devine, Robinson, Miller, and Hamwi were developed independently using slightly different height-weight relationships from different data sets — none is universally agreed upon as the single correct method.

This calculator is provided for general informational and estimation purposes only. Results should not be treated as professional financial, tax, legal, medical, or engineering advice. Always verify critical calculations with a qualified professional or official source before making decisions.