Most periods shed about 30–40 mL of blood per cycle; loss above 80 mL is treated as heavy bleeding.

Most people lose around 500–1,000 mL of blood during a cesarean birth, and clinicians track both the total and your vital signs to spot trouble early.

Most births involve around 500 mL of blood loss after vaginal delivery and around 1,000 mL after a C-section, with wide variation by person and birth type.

Most whole-blood donations collect one pint of blood (around 450–470 mL), plus a few small tubes for lab testing.

A standard whole-blood donation is about 450–500 mL (close to 1 pint), plus a few small tubes taken for lab testing.

Most whole-blood donations collect about one pint (450–500 mL) plus a few small tubes for testing.

Most adults carry around 4.5–5.5 liters of blood, with total volume shifting with body size, sex, and pregnancy.

Most adults carry around 4.5–5.5 liters of blood, and the total shifts with body size, age, pregnancy, and hydration.

A standard whole blood donation collects about 1 pint (around 470 mL), plus a few small test tubes for screening.

A standard whole blood donation collects about 450–470 mL (just under one pint) in around 5–10 minutes.