Calgon, take me away. If you shower for more than six minutes, a luxurious bubble bath will actually use less water. A typical shower uses about 5 gallons of water per minute, while a bath uses around 30 gallons of water total. If you want to linger to enjoy the warm water, take a bath instead. And here's a tip to save even more water: Wash the family dog in the bath after you've taken yours. Just be sure to not use any harsh soaps when you luxuriate in the bath first!