Ballpark — April 9, 2026

Average runtime of a Hollywood feature film

110 minutes

Includes trailers and credits.

Pianos in New York City

20,000 pianos

A classic "Fermi problem" estimation.

Miles of blood vessels in the human body

60,000 miles

Mostly made of tiny capillaries.

Gallons of water an average toilet flushes each year

2,920 gallons

Assuming 5 flushes per day per person.

Percent of the world that is left-handed

11%

Roughly 1 in 10 people worldwide.