Ballpark — March 18, 2026

Heart rate of a blue whale

~4 gal/cycle

Many modern dishwashers use only a few gallons per load.

Hours a newborn baby sleeps per day

~16 hours

Newborns often sleep most of the day—commonly 14–17 hours.

How many gallons of water does a washing machine use per load?

~20 gal/load

Laundry loads can use on the order of tens of gallons of water.

Population of Tokyo metro area

37.3 million people

The metro area includes Yokohama, Kawasaki, and Chiba.

Height of Mount Everest

29,025 feet

Officially measured from sea level.