Goodfolk Health Utilities
Water Intake Calculator
Estimate daily water intake based on weight, activity, weather, and caffeine or alcohol intake.
This is a general hydration estimate. Needs vary based on sweat rate, climate, medications, medical conditions, pregnancy, and diet.
Water intake estimate
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Frequently Asked Questions
How much water should I drink per day?
A common starting estimate is about half your body weight in ounces per day, then adjusting for activity, weather, caffeine, alcohol, and personal needs.
Does exercise change how much water I need?
Yes. More activity usually increases fluid needs because you lose more water through sweat and breathing, especially during long or intense workouts.
Is this water intake calculator medical advice?
No. This calculator is for general planning only. People with fluid restrictions, kidney disease, heart conditions, pregnancy, or medication concerns should follow professional medical guidance.