Water Intake Calculator
Find how much water you should drink daily based on weight and activity.
🔄 Updated October 13, 2026
About the Water Intake Calculator
The Water Intake Calculator helps you track an important health number in seconds. Find how much water you should drink daily based on weight and activity. Results are estimates for awareness and planning — always consult a qualified professional for medical advice. You may also like the BMI Calculator and TDEE Calculator.
How to use this calculator
- Enter your numbers in the fields above.
- Results update instantly — no button to press, no page reload.
- Adjust the inputs to compare scenarios with the Water Intake Calculator.
Keep exploring: BMI Calculator · Calorie (BMR) Calculator · Age Calculator · Pregnancy Calculator
Frequently asked questions
Is 8 glasses a day correct?
Needs vary by body size, climate and activity — this calculator personalizes it.
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