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Daily Water Intake Calculator — How Much Water Should You Drink?
Get your personalized daily water intake recommendation based on body weight, activity level, climate, and life stage.
Daily Water Recommendation
106 oz
Per day
13.5 cups
In Cups
3.1 L
In Liters
13 glasses
8oz Glasses
Drink 106 oz (3.1L) of water per day. Tip: drink 13 oz every 2 hours during waking hours to stay consistently hydrated.
Analysis & insights
Your daily water target is 106 oz (about 13 8-oz glasses or 3.1 liters). This accounts for your body size, activity level, and climate. Hit this consistently and your urine should be pale yellow throughout the day. Add ~16 oz per hour for intense exercise; reduce slightly in cool, humid climates.
High intake
Above-average target — appropriate if active, larger-bodied, or in hot climates.
Risk & benchmark gauge
Current band
Standard
106 oz/day target
Industry benchmarks
- Your target106 oz (13.5 cups, 3.1 L)
- 8x8 rule64 oz (8 cups)
- NAS adequate intake (M)125 oz (3.7 L)
- NAS adequate intake (F)91 oz (2.7 L)
Key insights
Food provides ~20% of fluid
Fruits, vegetables, soup, yogurt, and other foods provide roughly 20% of your daily water. The remaining 80% needs to come from drinks (water, tea, coffee, milk all count).
Urine color is the simplest indicator
Pale yellow = well-hydrated. Dark yellow or amber = drink more. Completely clear = you may be slightly overhydrated (usually fine, but unnecessary).
Don't overdo it
Drinking dramatically more than your body needs dilutes electrolytes and rarely improves health. Hyponatremia (low blood sodium) is a real risk for endurance athletes and grazing water-bottle types.
Recommended actions(4)
Front-load water in the morning
High priorityDrink 16-20 oz within an hour of waking — you wake up dehydrated after 6-8 hours without fluid.
Carry a marked bottle
Medium priorityA bottle with hour-markers (or even just a 32 oz bottle you refill 2-3x daily) makes hitting the target nearly automatic.
Add ~16 oz per hour of intense exercise
Medium prioritySweat losses scale with intensity, temperature, and humidity. For workouts longer than 1 hour or in hot conditions, add electrolytes (sodium + potassium).
This tool is for informational purposes only and does not constitute medical advice. Consult a healthcare professional for advice specific to your situation.