How many people can fit in the London Eye?

The London Eye has 32 airconditioned capsule representing the 32 Boroughs of London. Each capsule holds 25 people making the total capapcity of the London Eye 800.

https://en.wikipedia.org/wiki/London_Eye#Design_and_construction

800 people.

The wheel carries 32 sealed and air-conditioned egg-shaped passenger capsules, attached to its external circumference, each capsule representing one of the London Boroughs. Each 10 tonne capsule holds 25 people, who are free to walk around inside the capsule, though seating is provided. It rotates at 26 cm (10 in) per second (about 0.9 km/h or 0.6 mph) so that one revolution takes about 30 minutes. The wheel does not usually stop to take on passengers; the rotation rate is slow enough to allow passengers to walk on and off the moving capsules at ground level. It is, however, stopped to allow disabled or elderly passengers time to embark and disembark safely.

https://en.wikipedia.org/wiki/London_Eye

In an effort to wean people off Wikipedia, here's the answer from another site:

"On each rotation the London Eye has the capacity to carry at least 800 passengers and that is comparable to the load of 11 double decker red buses in London."

http://toptravellists.com/london-eye-facts/