A standard whole blood donation collects just under a pint (around 450–470 mL), which is usually less than one-tenth of an adult’s blood volume.

A standard whole-blood donation is about one pint (around 470 mL), and other donation types collect different amounts based on the method and your size.

Most people lose about 2–3 tablespoons (30–45 mL) of menstrual blood per period, and 80 mL is often used as the upper cutoff for heavy bleeding.

Most people lose about 30–40 mL of blood per period, while bleeding above 80 mL is often treated as heavy menstrual bleeding.

Most people lose 2–3 tablespoons (30–45 mL) of blood per cycle, while the rest of the flow is tissue and fluid that can make it look like more.

Most people lose 30 mL of blood per period on average, and repeated blood loss above 80 mL per cycle is commonly classed as heavy.

Most people lose around 30–40 mL of blood per period, while heavier bleeding is often flagged at over 80 mL or flow that disrupts daily life.

Most periods release about 2–3 tablespoons of blood across several days, while heavy bleeding can pass 5+ tablespoons and still look “normal” on a pad.

Small, soft clots can show up on heavier days, while frequent quarter-size clots or bigger ones paired with flooding are a reason to get checked.

Most people lose about 30–40 mL of blood per cycle; bleeding above 80 mL is often classed as heavy.