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To fill a classroom
about 829,000 tennis balls
Quick answer
About 829,000 tennis balls would fill the space of a classroom, about 216,000 liters.
It would take 829,000 tennis balls to fill a classroom. This amount of balls would create a heap 47.9 ft (14.6 m) wide and 12.7 ft (3.88 m) tall, which is about 7 times the size of a 20-foot shipping container.
Sizes and weights are typical for an adult or standard tennis ball; real ones vary.
Any amount, count or size comparison. We'll show you ones already made first.