How Much Water Should You Drink a Day?
Fluid needs vary with body size, activity, climate, diet and health. There is no single daily amount that fits everyone.
Why estimates vary
Individual results can differ because body composition, activity, diet, environment and other factors vary from person to person. Calculator results should therefore be treated as estimates.
Use the result as a starting point
Combine calculator estimates with consistent habits and longer-term trends. Avoid extreme diet or exercise changes. If you have a medical condition or special nutritional needs, consider advice from a qualified healthcare professional.
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