Calculate Ping Pong Balls Needed for a Pool

A regulation ping pong ball has a diameter of 40mm (1.57 inches). When calculating how many balls can fill a pool, we need to consider:

Key Factors in the Calculation

• 🏊‍♂️ Pool Volume: Length × Width × Depth
• 🏓 Ball Volume: 4/3 × π × r³ (≈ 33.51 cm³)
• 📐 Packing Density: About 74% (π ÷ 3√2)

Interesting Facts

• 🤔 A standard 20ft × 40ft pool with 5ft depth needs approximately 120,000 ping pong balls
• 💡 The balls naturally form a hexagonal close-packed structure
• ⚡ The air gaps between balls account for about 26% of the total volume