ToolNest

💧Water Intake Calculator

Calculate your daily recommended water intake.

🆓 Free🔒 Secure⚡ Instant📱 Mobile-friendly🚫 No signup

Calculate daily water intake online for free. Based on weight and activity level.

Daily Water Intake2.81 L
In Ounces95 fl oz
8-oz Glasses12 glasses

How to Use Water Intake Calculator — Step by Step

  1. 1Enter your weight (kg or lbs) and activity level
  2. 2Optionally enter your climate — hot climates require more hydration
  3. 3Click 'Calculate' — daily water intake recommendation in litres and glasses is shown
  4. 4View how exercise and heat affect your hydration needs

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Frequently Asked Questions

Is this tool completely free?

Yes. All ToolNest tools are 100% free with no signup required, no account, and no watermarks added to output files.

Are my uploaded files secure and private?

All uploads use HTTPS encryption during transfer. Files are processed on secure isolated servers and automatically deleted within 2 hours of upload.

Does this tool work on mobile phones?

Yes. ToolNest works on any modern browser on iPhone, Android, tablet, or desktop — no app download or plugin needed.

Do I need to create an account?

No. Just open the tool, upload your file, and download the result. No email, no signup, no password.