What is the weight of a standard football??

FIFA Approved standard Circumference 68.5 – 69.5 cm (27-28 inches) Diameter = 1.5% difference (hence, spherical) Water absorption = 10% weight increase Weight 420 - 445 g (14 - 16 oz) (at the start of the game) Shape and size retention 2000 cycles at 50 km·h Rebound test = 10 cm Pressure equal to 0.6 – 1.1 atmosphere (600 – 1100 g/cm2) at sea level (8.5 lbs/sq in 15.6 lbs/sq in) Loss of pressure = 20%

Soccer balls: 14 - 16 ounces American Football: 14 - 15 ounces