Water Intake Calculator
Calculate how much water you should drink daily based on weight, activity level, and climate.
Daily Water Intake
3.0 L
100 oz / 13 glasses
Milliliters
2,969 mL
Fluid Ounces
100 oz
Cups (8 oz)
12.5 cups
Bottles (16.9 oz)
6 bottles
Suggested Schedule
Wake up15 oz (1.9 cups)
Mid-morning15 oz (1.9 cups)
Lunch15 oz (1.9 cups)
Afternoon20 oz (2.5 cups)
Pre-dinner15 oz (1.9 cups)
Evening20 oz (2.5 cups)
Frequently Asked Questions
How much water should I drink daily?+
A general guideline is about 35ml per kg of body weight (about half your body weight in ounces). Active people and those in hot climates need more. The '8 glasses a day' rule is a rough estimate.
Does coffee count toward water intake?+
Yes, mostly. While caffeine is a mild diuretic, the water in coffee and tea still contributes to hydration. However, pure water is still the best source.
How do I know if I'm hydrated?+
Check your urine color — pale yellow indicates good hydration. Dark yellow means drink more. Other signs of dehydration: thirst, dry mouth, headaches, and fatigue.