Ideal Weight Calculator
There is no single "ideal weight" — for your height there is a healthy range: the World Health Organization's normal BMI range (18.5–24.9) multiplied by the square of your height. For example, for 1.70 m the healthy range is 53.5–72.0 kg. Enter your height and sex — your range and the classic Devine formula reference are calculated instantly.
Enter your height — your result appears here instantly.
The range is the WHO normal BMI band (18.5–24.9) converted to your height; if your muscle ratio is high, your healthy weight may be above the range.
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Healthy weight ranges by height
| Height | Healthy range (BMI 18.5–24.9) | Devine — Female | Devine — Male |
|---|---|---|---|
| 1.60 m | 47.4 – 63.7 kg | 52.4 kg | 56.9 kg |
| 1.70 m | 53.5 – 72.0 kg | 61.4 kg | 65.9 kg |
| 1.80 m | 59.9 – 80.7 kg | 70.5 kg | 75.0 kg |
| 1.90 m | 66.8 – 89.9 kg | 79.5 kg | 84.0 kg |
Ranges are derived from the WHO normal BMI band and Devine values from the classic formula; both are general references.
For informational purposes only; not medical advice. A personal target should be set with a doctor or dietitian based on age, body composition and health status.
The honest answer to "how much should I weigh for my height?" is not a single number but a range. Two people of the same height can have very different bone structure, muscle ratio and fat distribution; that is why the modern health approach defines a healthy range by converting the World Health Organization's normal BMI band (18.5–24.9) into your height. That range is the main result of the calculator on this page.
The Devine Formula: A Classic Reference
For those who want a single number, the best-known formula is Devine, developed in 1974: it starts at 50 kg for men and 45.5 kg for women, and adds 2.3 kg for every 2.54 cm over 152 cm. It was actually created to standardize drug doses; it is still used today as a practical reference. The result usually landing in the middle of the healthy range is no coincidence — but because the formula doesn't know your muscle ratio, it can be misleading for athletes and larger-framed people.
Where in the Range Should You Aim?
The whole range is considered "healthy"; neither the lower nor the upper end is the right target for everyone. Someone wanting to preserve muscle mass might sit between the middle and the upper end of the range; what matters is that the target is sustainable and how you feel. To see where your current weight sits relative to the range, you can calculate your body mass index.
The Path to Your Target: Calorie Balance
Once a target weight is set, the work comes down to daily calorie balance: calculate your daily calorie needs, set a small deficit or surplus based on your goal, and track what you eat consistently. A gradual change of about 0.25–0.5 kg per week both preserves muscle and makes the habit stick.
Frequently asked
How is ideal weight calculated?
The modern approach gives a healthy range for your height rather than a single number: the World Health Organization's normal BMI range (18.5–24.9) is multiplied by the square of your height. For example, for 1.70 m the healthy range is roughly 53.5–72.0 kg. Classic formulas like Devine produce a single reference value based on height and sex; read together, they give a healthier picture.
What is the Devine formula?
It is a classic reference formula developed in 1974 to calculate drug doses: for men it starts at 50 kg and adds 2.3 kg for every 2.54 cm over 152 cm; for women it starts at 45.5 kg. For example, a man 1.70 m tall gets about 65.9 kg, and a woman of the same height 61.4 kg. It is a practical reference but does not account for body composition.
Why does ideal weight differ by sex?
Men have a higher average proportion of muscle mass; classic formulas reflect this difference with sex-specific starting values. The healthy BMI range, however, is considered the same for both sexes — which is why the range is independent of sex while the Devine value differs by sex.
I'm muscular — do these formulas apply to me?
Only to a limited extent. The formulas know nothing beyond your height and sex; the healthy weight of a very muscular person can be above the formula results. In that case measures like body-fat percentage and waist circumference are more meaningful, and it's best to set the target with a sports physician or dietitian.
How do I reach my ideal weight?
The mechanism is calorie balance: your daily calorie target is set based on where you are relative to the target range, and eating habits are adjusted accordingly. A gradual pace of about 0.25–0.5 kg per week is the most sustainable way to progress while preserving muscle. In cases of chronic illness or pregnancy, the plan should be set with a doctor.
You've picked your target — now track the journey.
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