How much water per day does a human need to survive?
•
4 min read
The human body is composed of 50 to 75% water, and an adult can only survive about three days without it under normal conditions. The precise amount of water per day does a human need to survive depends on numerous individual and environmental factors, making the common 'eight glasses' rule an oversimplification. This guide delves into the specifics of human hydration needs, from average daily intake to bare-minimum survival amounts.