Total blood volume5 thousandths m³
8.3 tenthsSneeze clouds
55.6 trillionRed blood cell volumes
1.3 sextillionRibosome interiors
About 5 liters in an average adult
Photo from Wikimedia Commons
Human Blood Volume
5 liters keeping the whole operation running/The Human Body
The average adult has about 5 liters (0.005 m³) of blood circulating through roughly 100,000 km of blood vessels. Blood makes up about 7-8% of total body weight, coming in at around 5.3 kg. A single red blood cell completes one full circuit of the body in about 20 seconds, and your bone marrow produces about 2 million new red blood cells every second to keep things flowing.
Measurements
Blood mass5.3 kg
5.3 hundredthsBaby elephants
1.7 thousandthsTesla Cybertrucks
1.18Adult house cats
Blood density ~1.06 kg/L
Blood temperature310 K
19.7 millionthsSun cores
2.4 tenthsKiln firings
6.9 tenthsCookie ovens
37°C, matching core body temperature
Total vessel length100 million m
641 millionDollar bills
1 billionSoftball diameters
1,923Isle of Man lengths
About 100,000 km if laid end to end, 2.5 times around Earth
Full circulation time20 s
9.6 quadrillionthsDinosaur extinctions ago
2.5Toddler attention spans
21.1 billionthsGenerations
One red blood cell completes a full circuit in ~20 seconds
Red blood cell production rate2 million Hz
1.7 millionResting heartbeats
2AM radio waves
8 millionWind turbine rotations
About 2 million new RBCs per second from bone marrow
Red blood cell diameter7 millionths m
78.7 millionthsCrayons
718 billionthsSquash court lengths
383 billionthsBowling lane lengths
About 7 micrometers