Water Intake Calculator
Calculate your daily water intake recommendation based on weight and activity.
How to use this tool
1
Open Water Intake Calculator
The tool is already loaded above — no download or account needed.
2
Enter your data
Paste or type your input. Results appear instantly.
3
Copy or download
Export your result with one click — ready to use anywhere.
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Why use this tool
100% in-browser
Your data never leaves your device — fully private.
No signup needed
Use any tool instantly without creating an account.
Always free
Every tool is free with no daily limits or paywalls.
Copy & download
Export results in one click, ready to paste anywhere.
FAQ
Is the "8 glasses a day" rule accurate?
It's a rough approximation. Individual needs vary significantly based on body weight, activity level, climate, and diet. The calculator gives a more personalised estimate.
Does coffee and tea count towards water intake?
Yes — caffeinated drinks contribute to hydration despite mild diuretic effects. Plain water is best, but all fluids count.
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