Water Intake Calculator
Calculate how much water you should drink daily based on your weight, activity level, and climate
Frequently Asked Questions
How much water should I drink per day?▼
The general recommendation is about 8 glasses (64oz) per day, but your actual needs depend on your body weight, activity level, and climate. A more accurate formula is 33ml per kg of body weight, adjusted for activity.
Does coffee count toward water intake?▼
Yes! While coffee is a mild diuretic, the water content more than compensates. Coffee, tea, and other non-alcoholic beverages count toward your daily water intake.
How do I know if I'm drinking enough water?▼
Check your urine color — pale yellow means you're well hydrated. Dark yellow or amber means you need more water. Other signs of dehydration include headaches, fatigue, and dry mouth.
How to Use Water Intake Calculator
- 1Open the Water Intake Calculator tool above - it loads instantly in your browser.
- 2Enter your data or upload your file. Everything is processed locally on your device - nothing is uploaded to any server.
- 3Get your results instantly. Copy, download, or share - completely free with no signup required.
Water Intake Calculatoris part of BriskTool's collection of free online tools. All tools run entirely in your browser for maximum privacy and speed.