Ideal Weight Calculator
Calculate your Healthy weight range in seconds with the free Ideal Weight Calculator. No registration needed.
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Ideal weight
What is an Ideal Weight Calculator?
An Ideal Weight Calculator estimates a healthy weight range for your height using multiple established formulas. It provides both a single-number estimate (Devine) and a healthy BMI-based range for a more complete picture.
How to calculate ideal weight manually (the formula)
Devine formula: Men: 50 kg + 2.3 kg per inch over 5 ft. Women: 45.5 kg + 2.3 kg per inch over 5 ft. BMI-based: weight = BMI × height(m)². Healthy range uses BMI 18.5 to 24.9.
Example calculation
A 175 cm (5 ft 9 in) man using Devine: base 50 kg, plus 9 inches over 5 ft × 2.3 = 20.7 kg. Ideal weight = 50 + 20.7 = 70.7 kg. BMI midpoint (21.7): 21.7 × (1.75 × 1.75) = 66.5 kg.
Common mistakes
- Treating a single number as a target — Ideal weight formulas give estimates, not exact targets. The healthy BMI range is a more practical and flexible goal.
- Using the wrong formula for your body type — The Devine formula was developed for medication dosing and may not suit all body types. The BMI-based method is more universally applicable.
- Ignoring body composition — Two people at the same height and weight can look very different based on muscle vs fat. Use body fat percentage alongside weight for a fuller assessment.
Frequently asked questions
What is ideal body weight?
Ideal body weight is an estimate of a healthy weight for your height. Several formulas exist including Devine, Miller, and the BMI-based healthy range.
How is ideal weight calculated?
The Devine formula for men: 50 kg + 2.3 kg per inch over 5 feet. For women: 45.5 kg + 2.3 kg per inch over 5 feet. BMI-based method uses the healthy BMI range of 18.5 to 24.9.
Which ideal weight formula is most accurate?
The BMI-based healthy weight range is considered most useful for most people, as it provides a range rather than a single number. Different formulas suit different body types.
Does ideal weight account for muscle mass?
No, standard ideal weight formulas do not account for muscle mass. Athletes and muscular individuals may appear overweight by formula but have low body fat.
Can I use ideal weight for weight loss goals?
Yes, ideal weight can serve as a reference point, but a healthy BMI range is a more flexible and realistic target than a single ideal number.