Staying properly hydrated supports energy, digestion, skin health and cognitive performance. This calculator estimates your personal daily water target based on body weight, exercise, and climate.
Staying properly hydrated supports energy, digestion, skin health and cognitive performance. This calculator estimates your personal daily water target based on body weight, exercise, and climate. This calculator draws on peer-reviewed, industry-standard formulas used by fitness professionals, dietitians and clinicians worldwide, translated into a fast, easy-to-use browser tool.
Tracking metrics like this over time — rather than relying on a single reading — gives you a much clearer picture of trends in your health and fitness journey. Use this tool regularly alongside our other calculators for a fuller picture of your overall wellbeing.
Yes, in moderation. While caffeine has a mild diuretic effect, moderate consumption of coffee and tea still contributes to overall daily fluid intake.
Yes — you lose fluid through sweat, so add roughly 350-700ml for every 30-60 minutes of exercise, more in hot conditions.
Yes. Excessive water intake in a short period can lead to a dangerous condition called hyponatremia. Spread your intake throughout the day.