Water Intake Calculator — Daily Hydration Goal
Calculate your daily water intake goal based on body weight, activity level, and climate. See your recommended daily hydration in liters, ounces, and cups.
Water Intake Calculator
Daily hydration goal
How to use this tool
1. Enter your input. Use the form above — all processing happens in your browser, no data is sent to any server.
2. View the result. The output appears instantly below the input. Copy any value with one click.
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Frequently Asked Questions
Everything you need to know about this currency pair
The old '8 glasses a day' rule is a rough guideline. More accurately: aim for 0.5-1 oz of water per pound of body weight (30-35 ml per kg). A 150-lb (68 kg) person should drink 75-150 oz (2.2-4.4 liters) per day. Add 12 oz for every 30 minutes of exercise, and more in hot/humid climates.