Enter your body weight and activity level, and this water intake calculator estimates a personalized daily hydration target, more accurate than the generic “eight glasses a day” rule.
USA Water Intake Calculator
Estimate your personalized daily water consumption goal based on body weight, workout intensity, and environment.
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Daily Water Intake Components
Detailed Hydration Target Breakdown
| Hydration Factor | Fluid Volume | Description / Formula |
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Your needs shift on hot days, during exercise, or when you’re sick. Our article on how much water you should actually be drinking covers how to adjust your target for these situations.
Pair your hydration goal with our BMR calculator and TDEE calculator for a more complete daily nutrition picture.