Water Intake Calculator
Find your daily hydration needs
About the Water Intake Calculator
The ToolsVera water intake calculator estimates how much water you should drink daily based on your weight and activity level. Proper hydration helps energy, focus and recovery — and the goal is easier to hit when you know the number.
How to use the Water Intake Calculator
- Enter your weight: Type your weight in kg or lbs.
- Pick activity level: Choose sedentary, moderate or very active.
- Get your goal: See your daily hydration target in litres or ounces.
Why use our Water Intake Calculator?
- Personalized by body weight, not a flat 8-glass rule.
- Accounts for exercise and climate indirectly.
- Free and fast.
- Works on any device.
Frequently Asked Questions
Is this Water Intake Calculator really free?
Yes. Water Intake Calculator on ToolsVera is 100% free to use with no signup, no hidden limits and no watermark added to your output.
Does coffee count toward water intake?
Mostly yes. Non-alcoholic fluids contribute to hydration; aim to get the bulk from plain water.
Should I drink more in hot weather?
Yes. Add 500 ml for each hour of moderate heat or intense sweating.
Can I drink too much water?
Very rarely, but excessive intake in a short time can cause hyponatremia — spread intake through the day.
Is my data safe?
Yes. Files are processed on the server and automatically deleted — we never store your content.