Question: how much water does the human body lose each day?
Answer: Most people sweat out about two cups of water per day (0.5 liters). Each day, we also lose a little more than a cup of water (237 ml) when we exhale it, and we eliminate about six cups (1.4 l) of it. We also lose electrolytes -- minerals like sodium and potassium that regulate the body's fluids.