Water Intake Calculator
Water (L) = Weight (kg) × 0.033 + (Exercise min ÷ 30) × 0.3570×0.033 + 1×0.35 = 2.31 + 0.35 = 2.66 L
Free online tool
Water Intake Calculator
Enter your weight and activity to find out how much water you should drink each day.
Instant calculation
Calculate Daily Water Intake
Enter your weight and activity level.
Your result
Calculation
Your numbers stay in this browser. Nothing is uploaded or saved.
Three clear steps
How to use this calculator
- 01
Enter your weight
Type your body weight in kilograms.
- 02
Enter exercise duration
Type your average daily exercise in minutes.
- 03
See recommendation
Calculate to see your recommended daily water intake in liters and cups.
The formula
How this calculation works
Base recommendation: 33 mL per kg of body weight. Add 350 mL for every 30 minutes of exercise.
Check the method
Worked examples
Each example follows the same formula used by the calculator.
How much water for 70 kg with 30 min exercise?
70×0.033 + 1×0.35 = 2.31 + 0.35 = 2.66 L≈ 2.7 liters per dayCommon questions
Questions about this calculation
What is the Water Intake Calculator?
The Water Intake Calculator helps you calculate your recommended daily water intake based on weight and activity level. Enter your values and select Calculate to get an instant result.
How is the result calculated?
Base recommendation: 33 mL per kg of body weight. Add 350 mL for every 30 minutes of exercise.
Can you show an example?
Example: How much water for 70 kg with 30 min exercise? — ≈ 2.7 liters per day.
Is my data saved when I use the Water Intake Calculator?
No. All calculations run locally in your browser. Your inputs and results are never uploaded, stored or shared with anyone.
Is the Water Intake Calculator free to use?
Yes. The Water Intake Calculator is completely free. No account, sign-up or payment is required. It works on mobile, tablet and desktop.
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