volume — Special Report
How Much Space Does That Actually Take Up?
Fluid ounces, liters, gallons — in bathtubs, coffee cups, and swimming pools
Volume is the measurement that most reliably destroys our sense of scale. A liter? Fine, that's a water bottle. A thousand liters? A cubic meter — okay, roughly a washing machine drum. A million liters? Impossible. At that point, you just accept the number and move on.
This is why we use bathtubs. A standard bathtub holds about 60 gallons (227 liters), and everyone has climbed into one. It is a visceral, personal unit. When we tell you that the average American uses 80 to 100 gallons of water per day, you can picture it: one and a half bathtubs, every single day, before you've made coffee.
“An Olympic swimming pool holds 2,500,000 liters. You've drunk more coffee than you think.”
The Starbucks Venti is the other great reference unit of modern liquid measurement. At 24 fluid ounces, it occupies a precise zone between "drink" and "challenge." It is 1.5 pints, 0.71 liters, or approximately 0.0004 percent of a bathtub. All of these are true. None of them make you feel better about it.
At the other end of the scale: an Olympic swimming pool holds 660,253 gallons. The global ocean holds about 352 quintillion gallons. At some point, "gallons" ceases to be a meaningful unit and becomes a coping mechanism.
Our volume database has 12 verified containers, vessels, and bodies of liquid. All measurements sourced from manufacturers, municipal water authorities, and the people who built the pools.