How many litres of blood does the heart pump per day?
7,500 litres. That's roughly 50 bathtubs a day, moved by a fist-sized muscle that never takes a break.
How close would your guess have been?
In the game we ask it like this: “How many litres of blood does your heart pump in a single day?”
Type a number — scored exactly the way a round in the game is.
The answer
7,500litres
7,500 litres in other units
- 1,981 US gallons



