Under the February 2026 World Aquatics rules, the minimum dimensions for an Olympic Games or World Championships pool are 50 m × 25 m × 2.5 m, a rectangular volume of 3.125 million litres.
So 600 Olympic swimming pools would be approximately 1,875 million (1.875B) litres or 495.3 million gallons.
Under the February 2026 World Aquatics rules, the minimum dimensions for an Olympic Games or World Championships pool are 50 m × 25 m × 2.5 m, a rectangular volume of 3.125 million litres.
So 600 Olympic swimming pools would be approximately 1,875 million (1.875B) litres or 495.3 million gallons.