Health
What is your ideal weight for your height?
Estimate your ideal weight with the Lorenz formula and the healthy BMI range (18.5–24.9).
Quick answer
The Lorenz formula gives a single "ideal weight" estimate: for men, height (cm) − 100 − (height − 150) ÷ 4; for women, height − 100 − (height − 150) ÷ 2. A 175 cm man: 175 − 100 − 6.25 = 68.8 kg. The healthy BMI range (18.5–24.9) for the same height is 56.7–76.3 kg — a wider band.
Ideal weight (Lorenz formula)
68.8 kg
- Healthy BMI weight range (18.5–24.9)
- 56.7 – 76.3 kg
Indicative estimate based on statistical formulas: real ideal weight depends on muscle mass, age and body composition. It does not replace professional advice.
How it works
Ideal weight formulas are statistical shortcuts from the early 20th century. Frame size, muscle mass and age all shift what is healthy for you. Treat the Lorenz number as a midpoint, not a target you must hit.
Frequently asked questions
Lorenz vs Devine formula — which is better?+
Both are rough estimates with similar accuracy. Lorenz is common in Italy; Devine (used in medicine for drug dosing) gives slightly different numbers. Neither accounts for body composition — use the BMI range alongside any single-number estimate.
Why is my ideal weight lower than I look healthy at?+
If you carry significant muscle, every formula based on height alone will underestimate your healthy weight. Compare yourself to the BMI range and body-fat percentage rather than a single Lorenz number.
Does ideal weight change with age?+
Standard formulas ignore age. Some research suggests a slightly higher BMI (up to 27) may be protective in adults over 65. Discuss targets with your doctor if you are older or managing chronic conditions.
How much should I weigh to run faster?+
Elite distance runners often have BMI 18–21, but chasing a number can backfire if it means losing muscle or under-fuelling. Performance improves most reliably from training volume, not extreme weight loss.
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