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Lorentz Ideal Body Weight Calculator

Lorentz ideal body weight: 68.8 kg

This result is for information only. Historical formulas do not replace an individual assessment by a doctor or dietitian.

What do these numbers mean?
  • Result for the settings above: 68.8 kg. It updates as soon as any field changes.
  • We compute it from the formula shown below — not from a prediction model and not from draw history.

These are historical data. Each draw is independent of previous draws, so these numbers do not tell us what will be drawn next.

How do I use this page?
  1. Fill in the fields in the form above — the result recomputes at once, with no page reload.
  2. Under the result you will find the interpretation scale, if the calculator has one: it says which range your value fell into.
  3. The formula we use is shown lower on this page — you can check the arithmetic yourself.
  4. To compute the same for another game or variant, change it in the select field — prices and pools update automatically.

Further reading

Formula

men: H − 100 − (H − 150) / 4 women: H − 100 − (H − 150) / 2.5
H is height in centimetres. For 180 cm: man 72.5 kg, woman 68 kg.
Theory — what is the Lorentz ideal body weight calculator?

The Lorentz ideal body weight calculator estimates a target weight based on height and sex. The formula was created as a correction to the classic Broca formula, because simply subtracting one hundred from height overestimated ideal weight for tall people, since the body does not widen at the same rate it grows taller. Lorentz additionally subtracts part of the height surplus above 150 cm, which makes it work better for people with atypical body proportions. It remains only an approximate estimate.

Frequently asked questions

How does the Lorentz formula differ from the Broca formula?
Lorentz additionally subtracts part of the height surplus above 150 cm, which Broca does not do. This makes the result lower and more realistic for tall people. For a man measuring 195 cm, Broca gives 85.5 kg, while Lorentz gives 83.8 kg.
How is ideal body weight calculated for a woman using the Lorentz formula?
The formula for women reads: height − 100 − (height − 150) / 2. A woman 168 cm tall will get 168 − 100 − 9 = 59 kg. The divisor of 2 instead of 4 makes the correction stronger than for men.
Is ideal body weight the same as perfect weight?
No. Ideal body weight is a statistical value calculated from the formula, around which a healthy population of a given height is distributed. A deviation of a few kilograms falls within normal range and requires no action.

See also

BMI Calculator

Calculate your BMI based on body weight and height. See which range you fall into, learn the WHO scale, and fi

Broca Formula Ideal Weight Calculator

Calculate your ideal body weight using the Broca formula based on height and sex. Learn the history of this 18

Harris-Benedict BMR Calculator

Calculate your basal metabolic rate using the Harris-Benedict equation. Enter weight, height, age and gender t

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