Water Intake Calculator
Calculate recommended daily water intake
Recommended Daily Water Intake
2.7 L
Glasses (250 ml)
10.6
Millilitres (nearest 100)
2,700
General estimate — needs vary with health conditions, pregnancy, and medications. Consult a doctor for personalized guidance.
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About Water Intake Calculator
Estimates a recommended daily water intake based on your body weight and activity level — a more personalized starting point than the generic "eight glasses a day" advice, which doesn't account for body size or how active someone actually is.
Enter your weight and activity level, and a suggested daily water intake is calculated.
Climate and individual sweat rate both affect actual hydration needs meaningfully — treat this as a reasonable baseline to adjust upward on hot days or during more intense exercise, rather than a fixed number that applies regardless of conditions.
Watch: Water Intake Calculator in Action
- Should I drink exactly this amount every day regardless of conditions?
- Treat it as a reasonable baseline to adjust from — climate and individual sweat rate both affect actual hydration needs meaningfully, so you'd typically want more on hot days or during more intense exercise.
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