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Water Intake Calculator

Enter your weight and today's exercise to see your water target in litres and glasses.

35 ml/kgFree

Your details

How it is calculated

Baseline need is about 35 ml per kg (2.6 L at 75 kg); water in food is not counted and covers roughly 20% of intake. Add 400–600 ml per 30 minutes of exercise, and 10% more in hot, humid weather. Coffee and tea count; pale yellow urine means you are fine.

With kidney or heart conditions, fluid targets come from your doctor. FitCi sets your water goal from your weight and reminds you.

Water tracking is free in FitCi

Weight-based goal, one-tap glasses, reminders and Apple Health sync.