Water Intake Calculator
Fill in the values and the answer updates as you type.
How the Water Intake Calculator works
About 33 ml per kg of body weight, plus 0.35 L for every 30 minutes of exercise.
Inputs and results
The Water Intake Calculator takes 2 inputs and gives 2 results.
What you enter
- Weight (kg) — starts at 68.
- Exercise per day (min) — starts at 30.
What you get
- Daily water (liters)
- Glasses of 250 ml
Example: Water Intake Calculator with the starting values
With weight 68 kg and exercise per day 30 min, the calculator returns:
| Daily water (liters) | 2.6 |
|---|---|
| Glasses of 250 ml | 10 |
Change any value above and the results update straight away.
Water Intake Calculator FAQ
How do I use the Water Intake Calculator?
Enter weight and exercise per day in the fields, then read daily water (liters) and glasses of 250 ml in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Water Intake Calculator calculate?
Daily water target based on weight and exercise. It returns daily water (liters) and glasses of 250 ml from the 2 values you provide.
What values does the Water Intake Calculator start with?
It opens with weight 68 kg and exercise per day 30 min so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Water Intake Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Water Intake Calculator for medical or health decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm medical or health decisions with a qualified professional. See the Disclaimer for more.