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Water Intake Calculator
Daily water needs from body weight and activity
Runs locally in your browser
Parameters
Results
- Daily water
- 2.65 L (90 fl oz)
- Cups (8 oz)
- 11.2
- Per hour (awake ~16h)
- 166 ml
General guidance only — not medical advice. Needs vary with health conditions and medications.
How it works
Estimates daily water needs from body weight, activity level, and climate.
Who it's for: Anyone building a hydration habit or training in heat.
Starts from ~33 ml per kg body weight.
Applies multipliers for activity and hot climates.
How to use
- Enter Weight and select Activity and Climate.
- Read Daily water in liters and fluid ounces.
Good to know
- This is general guidance, not medical advice.
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