According to FIFA, how many people engaged with the 2022 World Cup across all platforms?

How to get close to this number

Take the final's audience and apply a tournament multiple. The final reached around a fifth of humanity; a month-long tournament with sixty-four matches reaches everyone who watched any of them, which is several times the single-match figure. Three in five people alive is the result.

The word doing the work is "engaged". This counts anyone who watched any part of any match, or in some methodologies saw highlights or digital coverage, rather than people who sat through a game. Cumulative reach across a long event is always vastly larger than the audience for any moment of it, and the two get quoted interchangeably.

Even with that caveat, the reach is genuinely without parallel. No other recurring event — no election, no ceremony, no broadcast — reaches this fraction of the species, and the closest competitors are other editions of the same tournament. When a superlative is this wide, the measurement caveats change the number but not the conclusion.