Water Intake Calculator
Estimates a daily water target from body weight and activity level. Larger bodies and more active ones lose more fluid, so a single figure for everyone was never going to be accurate.
Free, no signupRuns entirely in your browser
Input
Result
- Daily Hydration Target
- 2.31 Liters
- Equates to
- 9 standard cups (250ml)
About
What the Water Intake Calculator does
Treat any such number as a rough guide. Fluid needs vary with climate, illness, pregnancy and diet — food contributes roughly 20% of total intake, and tea, coffee and juice all count toward hydration despite the persistent myth that caffeine cancels itself out. Thirst and pale urine remain better day-to-day indicators than hitting a target.
How it works
Using the Water Intake Calculator
- 1Enter your body weight.
- 2Select your typical activity level.
- 3A baseline requirement is calculated from weight.
- 4An allowance is added for activity.
- 5The daily target is shown in litres and millilitres.
Use cases
What people use it for
- Setting a daily hydration goal
- Planning fluid intake around training
- Adjusting intake in hot weather
- Checking whether your current intake is roughly adequate
FAQ
Frequently asked questions
6 related
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