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Is 20 gallons as big as a Blood Donation?

It's about 200 times as big as a Blood Donation
The size of a Blood Donation is about 0.10 gallons.
(American Red Cross donation volume)
The typical donation amount when giving blood is about 0.10 gallons. Donated quantities of blood typically have a viable shelf life of about 42 days.
There's more! See other comparisons to 20 gallons...