How much blood do cats have?

How much blood do cats have? I am referring to the domestic cat as this must be how the question should be interpreted.

The body of a typical cat of around 12 pounds or 5 kilograms contains about 330 ml (millilitres) or 12 ounces of blood.

To get a feel as to what this represents, it is the same amount as in a 12 oz can of coke.

Domestic cat has 12 ounces of blood

Domestic cat has 12 ounces of blood

The cat’s brain takes about 15-20 percent of the cat’s blood. This is 2.4 ounces.

Resting muscles get about 40 percent or 4.8 ounces. During pursuits after prey the muscles use 90 percent of the cat’s blood.

Nerves and hormones control how the blood is distributed. Blood vessels dilate to increase the amount of blood which is carried to a particular region.

The cat’s arteries carry the blood from the heart and is higher in pressure to blood in the veins where it is returned to the heart.

Veins have valves to ensure that the blood moves in one direction.


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Source: Dr Bruce Fogle’s The Encyclopedia Of The Cat

Note: sources for news articles are carefully selected but the news is often not independently verified.

Michael Broad

Hi, I'm a 74-year-old retired solicitor (attorney in the US). Before qualifying I worked in many jobs including professional photography. I love nature, cats and all animals. I am concerned about their welfare. If you want to read more click here.

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