How many people outside the U.S. watch the Super Bowl?

How to get close to this number

Anchor on the domestic figure and apply a small multiple. This site's companion question puts the American audience around a hundred and twenty-three million; for a sport played seriously in one country, the international audience is a fraction of that rather than a multiple. Roughly half is the right scale.

The comparison that matters is with a genuinely global event. A World Cup final reaches over a billion, which is an order of magnitude more, because the sport is played everywhere. Domestic dominance and global reach are completely different properties, and the biggest event in one country can be a minor broadcast everywhere else.

International audience figures are also the softest numbers in sports broadcasting. They are assembled from dozens of national measurement systems with incompatible methodologies, and leagues have an obvious incentive to report generously. Treat the domestic figure as measured and the international one as estimated.