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after losing between 25% - 40% of total blood volume. There's a whole host of variables that affect when exactly a person will start to lose consciousness due to blood loss.

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13y ago
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9y ago

The amount of blood lost before someone becomes unconscious is about two pints. Losing one pint of blood makes a person feel faint or pass out.

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12y ago
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15y ago

3 litres

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Q: How many pints of blood can someone lose before they become unconcious?
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