Water Intake
Enter your weight and daily activity to get a science-based daily water target in litres, 250 ml glasses and standard bottles — adjusted for exercise and hot weather.
FAQ
How is daily water need calculated?
A common baseline is 30–35 ml per kg of body weight, plus roughly 400–600 ml per hour of exercise, more in hot climates. This calculator applies those ranges to your inputs.
Does coffee and tea count?
Yes — all fluids count toward your daily total. Food typically adds another 20 %, so you rarely need to drink the full calculated amount on top of meals.
Can I drink too much water?
Yes, in extreme cases (several litres in a short time) — spread your intake through the day and drink more when you sweat heavily.