Ideal Weight

Introduction

The idea of an “ideal weight” is appealing—a single number that tells us we’re where we should be. In reality, health and wellbeing don’t boil down to one number. Ideal weight formulas and ranges are statistical tools that give a rough “healthy” weight range for your height and sometimes age or frame. This article explains what “ideal weight” usually means, how it’s often calculated, what healthy ranges look like, and how to use this information without letting it define your self-worth.

What Is It

“Ideal weight” in a health context usually means a weight range linked to lower risk of weight-related health issues and often derived from height-based formulas or from population data (e.g. weights associated with longest life expectancy). It’s not a personal prescription; it’s a range that fits many people of your height. Factors like body composition, bone density, and where you carry fat aren’t captured by simple formulas. So “ideal” is better thought of as “a commonly used reference range” rather than a target everyone must hit.

How It Is Calculated

Devine (men): 50 kg + 2.3 kg per inch over 5 ftDevine (women): 45.5 kg + 2.3 kg per inch over 5 ftOr: weight from BMI range 18.5–24.9 for your height

Common formulas include the Devine formula (used in some drug dosing): 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. The Robinson formula is similar with slightly different coefficients. Another approach is to use BMI: pick a “healthy” BMI range (e.g. 18.5–24.9) and back-solve for weight given your height. For instance, at 1.70 m, that might be about 53–72 kg. All of these produce a range, not a single number, and they’re based on population averages, not your individual biology.

Healthy Ranges

Healthy weight ranges are usually given as a band for your height (and sometimes sex). For example, a person who is 5’7” might see a range of roughly 121–158 lb (55–72 kg) depending on the formula. Staying within such a range is often associated with lower statistical risk, but being slightly above or below doesn’t automatically mean you’re unhealthy. What matters is your overall health, habits, and how you feel—not hitting one magic number.

Lifestyle Tips

If you want to move toward a weight range that feels right for you, do it with habits, not crash diets. Eat a balanced diet, move in ways you enjoy, sleep well, and manage stress. Small, consistent changes are more sustainable than drastic restrictions. If the “ideal” formulas put you in a range that feels unrealistic or triggering, it’s okay to focus on behaviour and wellbeing instead of a number. A doctor or dietitian can help you set a reasonable, individualised goal.

FAQs

Conclusion

Ideal weight is a height-based reference range, not a personal verdict. Use formulas or BMI-based tools to get a rough range, then prioritise sustainable eating and activity. Your “ideal” is better thought of as a weight you can maintain while feeling well and living a life you enjoy—with professional guidance if you need it.