Health calculators: body mass index, daily calorie needs, water intake, heart-rate zones, pregnancy due date, alcohol units and sleep timing. Each uses a published formula that the page cites — none of them contains a coefficient we invented, and none of them gives medical advice.
These calculators cite a formula rather than a law. The distinction matters: a tax rate changes value every year and needs a verification date, while the Mifflin–St Jeor equation and the definition of BMI do not move. So here you will see a source, but not a dated “verified” mark.
No number in this section is a diagnosis. BMI knows nothing about muscle mass, and a calorie figure is an estimate built on averages. They are useful as a starting point for a conversation with a doctor, not as a substitute for one.
No. They compute widely accepted formulas — body mass index, the Mifflin equation for calories, heart rate zones — and give a bearing, not a diagnosis. None of them accounts for illness, medication or pregnancy, so health decisions belong with a doctor.
It is a population measure, not a measurement of body composition. The World Health Organization's thresholds suit an average adult, but a muscular person reads too high and an older person too low. Waist circumference says more about risk than BMI alone.
Because they use different formulas — Mifflin, Harris–Benedict or Katch–McArdle — and different activity factors. The spread between them reaches two hundred calories a day, and none is a measurement: they are all statistical estimates.
No. Every calculation runs in the browser, and no weight, height, age or amount of alcohol is sent anywhere or stored. The site keeps no IP address, no analytics cookie, no session identifier and no device identifier.
Page updated 20/08/2026