FitorexHow much water, really
Neither two litres for everyone nor a magic formula: the base is your weight and sex, plus whatever you sweat out today.
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This calculator runs entirely in your browser and needs JavaScript enabled. No data is sent to any server — which is precisely why the maths has to happen here.
Counted up to 2 hours.
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What this is and is not
These are population equations with a typical individual error of ±10–15%. They are a starting point, not a measurement: what settles it is what happens on the scale, the tape measure and the mirror over two or three weeks. They do not replace advice from a health professional, nor are they suitable for prescribing a therapeutic diet.
Never type it again
In Fitorex these come from your profile and update themselves with every session and every weigh-in.
Free. No account required. Works offline from the first launch.