Calculate how many ball pit balls you need from pit length, width or diameter, ball depth and ball size, plus fill depth, packs to buy, cost and total weight.

Inside floor measurements of the pit or pool.

How deep the balls sit, not the wall height. Home pits use about 8 to 14 in; party pits use 14 to 20 in.

+ Packing, packs and cost options (optional)

Number of Balls for a Ball Pit Formula

The following formula is used to calculate the Number of Balls for a Ball Pit. 

B = L × W × D / 8 × 500

Variables:

  • B is the Number of Balls for a Ball Pit (# of balls)
  • L is the length of the ball pit (ft) 
  • W is the width of the ball pit (ft) 
  • D is the depth of the ball pit (ft) 

To calculate the number of balls for a ball pit, multiply the length, width, and depth in feet, divide by 8, then multiply by 500.

How to Calculate Number of Balls for a Ball Pit?

The following steps outline how to calculate the Number of Balls for a Ball Pit.

  1. First, determine the length of the ball pit (ft).
  2. Next, determine the width of the ball pit (ft). 
  3. Next, determine the depth of the ball pit (ft). 
  4. Next, gather the formula from above = #B = L*W*D / 8 * 500.
  5. Finally, calculate the Number of Balls for a Ball Pit.
  6. After inserting the variables and calculating the result, check your answer with the calculator above. 

Example Problem:

Use the following variables as an example problem to test your knowledge.

length of the ball pit (ft) = 5

width of the ball pit (ft) = 10

depth of the ball pit (ft) = 5

#B = L*W*D / 8 * 500 =  ?