Footballs are usually inflated to 13 psi. I've seen junior footballs that were supposed to be inflated to 7.
For an Association football, 8-12 psi. For an American football, 12.5-13.5 psi. For an Australian football, 9-11 psi.
9.0-11.0 psi - [Ref. "Football (ball)" - Wikipedia]
A football used in a professional match within the UK should be inflated to 12.5 PSi exactly.
Official FIFA soccer balls must be inflated to 12.5-13.5 pounds per square inch.(PSI).
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7.5 to 8.5 psi
The pressure inside a football is caused by the air particles inside the ball being compressed by the addition of increasing amounts of air. The standard PSI of a professional football is 13 psi (Pounds per square inch).
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13 psi
Footballs are inflated to 13 pounds per square inch (psi).
A football is typically inflated to a pressure of around 12.5-13.5 psi (pounds per square inch). However, the specific pressure may vary slightly depending on personal preference and playing conditions.
Pump it up until it is firm, but not too firm. Bounce it on hard to firm ground, it should bounce from dropping it from your waist height up to your waist height. DO NOT pump it up by compressor, ALWAYS use a HAND PUMP. Ball have been known to EXPLODE. Happy Footballing