Water Intake Calculator

Calculate daily water intake needs.

Your Details

Enter your weight and activity level

Activity Level

Daily Water Intake

Cups

Fl oz

8oz Glasses

Enter your weight and activity level to calculate daily water needs.

Step-by-step Solution

Hydration Tips

Drink a glass of water first thing in the morning.

Increase intake during exercise and hot weather.

Coffee, tea, and food count towards total fluid intake.

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About This Calculator

Calculate daily water intake needs.

Everything is worked out in your browser as you type, so your figures never leave your device.

Pro Tips

Results update as you type — change any field to see the effect immediately.

Check that every value uses the same unit before comparing results.

Use the copy button to paste the water intake figures into a note or spreadsheet.

Nothing is sent to a server, so you can use this with private figures.