Water Intake Calculator
A simple estimate of how much water you should drink per day.
How to use
Enter weight (kg) and activity level.
Formula
~33 ml/kg + extra for activity.
Examples
- 70kg, moderate → ~2.7 L/day
Important notes
Estimate; needs vary with climate, health and sweat rate.
Frequently asked questions
Does coffee count?
Caffeinated drinks count partially; water is best.