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429,315 million gallons
About 142.5 billion gallons of gasoline are used each year in the United States. This represents 392 million gallons per day. This is based on an estimated figure of 9.12 million barrels per day, 43 gallons per barrel, 365 days in a year.
It is estimated to be 15000 births per hour in the United States.
31.1 (milligrams per liter) = about 1.817 grains per US gallon.
About 0.264 US gallons per liter