Is 645.50 miligrams as heavy as a Cat?
It's about one-ten-thousandth as heavy as a Cat
The weight of a Cat is about 5,000,000 miligrams.
(Felis catus) (Domestic; healthy weight)
The average domestic cat should weigh about 5,000,000 miligrams. Cats are known for their righting reflex, which allows them to land on their feet and survive falls from heights of 1 m up to about 21 m.
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