How much does a regulation football weigh, in grams?

How to get close to this number

Use your hands. Most people have held a football and know it is light enough to be headed without injury but heavy enough to travel when struck hard. That brackets it between a tennis ball and a bag of sugar — and once you have that bracket, the answer sits close to the middle of it. Physical familiarity is an underrated estimation tool and this is a question built for it.

The complication is that a ball in play does not weigh what a ball on a shelf weighs. Rain adds mass to older leather balls, which is why players from earlier eras describe a heavier game; modern laminated synthetics absorb almost nothing, so the regulation weight now holds through ninety minutes of a wet match. The rule has barely changed, as the explanation notes, but what the rule delivers on the pitch has changed enormously.

The laws specify a range rather than a single figure, along with a circumference and an inflation pressure, and match balls are checked against all three. Quoting one number for the weight of a football therefore means quoting a typical value inside a legal band. That is a common shape for a sports specification and worth recognising, because it explains why two sources can give slightly different answers and both be right.