Water a day - How much to drink, for your weight

How much to drink, for your weight. Free online tool, no sign-up.

Free to use, with no sign-up, and it works just as well on a phone as on a computer.

More health tools

• BMI - With the healthy range for your height
• Ideal weight - A healthy range for your height
• Due date - Pregnancy dates from your last period
• Body fat - An estimate from a tape measure

See all 72 tools