How much water should I drink a day?

Your needs depend on body size, activity, climate, food and health. This calculator gives a useful starting point, then your thirst and routine help you fine-tune it.

How is my daily water goal calculated?

Your needs depend on body size, activity, climate, food and health. This calculator gives a useful starting point, then your thirst and routine help you fine-tune it.

Do I need more water when I exercise?

Your needs depend on body size, activity, climate, food and health. This calculator gives a useful starting point, then your thirst and routine help you fine-tune it.

Does hot weather change how much water I need?

Your needs depend on body size, activity, climate, food and health. This calculator gives a useful starting point, then your thirst and routine help you fine-tune it.

Does coffee count toward my water intake?

Your needs depend on body size, activity, climate, food and health. This calculator gives a useful starting point, then your thirst and routine help you fine-tune it.

How can I remember to drink enough water?