What is the percentage of water in the human body?

Correct answer: 60%. An adult human body is about 60% water.

Background: The percentage is higher in babies and lower in older people.

• 50%: 50% is lower than the average for adults.
• 70%: 70% is higher than the average for adults.
• 80%: 80% is higher than the average for adults.

Did you know? The brain and heart are about 73% water.

Memory trick: Body ≈ 60% water.