How many litres of blood does an average person have?

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Multiple Choice

How many litres of blood does an average person have?

Blood volume in an average adult is about 5 litres, roughly seven percent of body weight. Because of natural variation, this is often expressed as a span around five litres, commonly around four and a half to five and a half litres. When choosing a range, the one that best matches this typical estimate is the around four to five litres range, since it centers near the usual 5 L value without extending into ranges that are clearly too low or too high for an average person. Individual size and health can shift the amount a bit, but the standard benchmark is close to 5 litres.

Blood volume in an average adult is about 5 litres, roughly seven percent of body weight. Because of natural variation, this is often expressed as a span around five litres, commonly around four and a half to five and a half litres. When choosing a range, the one that best matches this typical estimate is the around four to five litres range, since it centers near the usual 5 L value without extending into ranges that are clearly too low or too high for an average person. Individual size and health can shift the amount a bit, but the standard benchmark is close to 5 litres.

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