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Broca Formula Ideal Weight Calculator

The classic variant is described in the text below. The historical variant is the formula from the former site: men (height − 100) × 0.9 + 0.4 × age, women (height − 104) × 0.85 + 0.4 × age.

Ideal weight per Broca formula: 67.5 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: 67.5 kg. It updates as soon as any field changes.

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

Theory — what is the Broca formula?

The Broca formula is one of the oldest ways to estimate ideal body weight, proposed in 1871 by a French surgeon and anthropologist. In its basic form, ideal weight equals height in centimetres minus 100, while a sex-based version adjusts this result. The calculator derives ideal weight from height and sex. It is a simple historical estimate still used for rough orientation, but it does not account for body frame or muscle mass.

Frequently asked questions

What is the Broca formula?
In the basic version, ideal weight equals height in centimeters minus 100. In the version with a sex coefficient, the result is multiplied by 0.9 for men and by 0.85 for women. A woman 165 cm tall has an ideal weight of (165 − 100) × 0.85 = 55.3 kg.
Is the Broca formula more accurate than BMI?
No. The Broca formula dates back to 1871 and only accounts for height and sex, while BMI relates weight to the square of height, which better describes the relationship between these values. Broca overestimates ideal weight for very tall people and underestimates it for short people.
For whom doesn't the Broca formula work?
The formula gives unreliable results for people under 150 cm and over 195 cm tall, for children, pregnant women, and people who train with weights. It also shouldn't be used for people after amputations or with significant swelling.

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

Harris-Benedict BMR Calculator

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

Lorentz Ideal Body Weight Calculator

Calculate ideal body weight using the Lorentz formula based on height and sex. See how it differs from the Bro

← All calculators

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