Daily Water Intake Calculator
Calculate your recommended daily water intake based on weight, activity, and climate.
Calculation Inputs
Calculation Results
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Enter inputs on the left and click Calculate to view results.
Formula & Methodology
Base = Weight × 0.033L; +0.5L per 30min exercise; +0.5L in hot climate
Adequate hydration supports metabolism, cognitive function, and physical performance. Most adults need 2-3.5 liters per day.
Frequently Asked Questions
Does coffee count toward daily water intake?
Yes, caffeinated beverages do hydrate, though slightly less than water due to mild diuretic effects. Water and herbal teas are best.