Water Intake Calculator

Daily hydration estimate.

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Private by design: This tool runs in your browser — your data is not uploaded.

For information only — not medical advice.

How to use Water Intake Calculator

At 70 kg with light exercise, many guidelines suggest roughly 2.5 liters (85 oz) of water per day — adjust for your weight and activity.

Step-by-step

  1. Enter weight in kilograms.
  2. Optionally add exercise hours per day.
  3. See recommended daily intake in ml, liters, and oz.

Common questions

Does this count coffee and tea?
This is a general hydration estimate; individual needs vary.
Is this medical advice?
No. Use as a rough guide only.

Last updated: 2026-06-05