How many bicycles are there in the world?

How to get close to this number

Anchor on cars and adjust upward. Most people have a rough sense of how many cars exist globally, and a bicycle is vastly cheaper, needs no licence, no fuel and no insurance, and is the primary vehicle across much of Asia and Africa. So the answer has to exceed the car count, as the explanation says, and the round figure of a billion is the standard estimate.

The rich-country bias is the thing to correct for. Where cars are affordable, bicycles are leisure items; where they are not, bicycles are how people get to work. Since the majority of the world lives in the second category, a global estimate anchored on European or American ownership patterns will land far too low.

The efficiency claim in the explanation deserves its own note, because it is genuinely remarkable: a bicycle is the most energy-efficient form of transport ever devised, better even than walking, because it eliminates the cost of repeatedly lifting and lowering your own body weight. Global bicycle counts are necessarily rough estimates built from production and trade data rather than registries, since bicycles are not licensed in most countries.