Two numbers decide how many people a roller coaster moves, and neither of them is the height: how many people fit in the train, and how often a loaded train leaves the platform. Everything else is decoration.
This is a ceiling, not a forecast: it assumes every dispatch hits the interval you typed, with no held trains and no restraint check running long. Context comes from the 163 European coasters with a declared capacity in my own database.
How the number is worked out
Seats per train × 3600 ÷ dispatch interval in seconds. That is the whole formula, and it is the one the industry uses.
A train of 20 leaving every 90 seconds moves 800 riders an hour. The same train leaving every 60 seconds moves 1,200. Thirty seconds of platform discipline is worth four hundred people an hour, which is why a ride’s queue is decided by its station and not by its layout.
Why the station is the bottleneck
Track is cheap in time terms: a loaded train returns whenever it returns, and on a ride with two or more trains that return is never what limits you. What limits you is the platform — restraints checked, loose items confiscated, the operator’s dispatch call — and the platform is the one part of the ride nobody puts in a press release.
This is why two rides with practically identical declared capacity can hold queues of eighteen and sixty-nine minutes. I measured exactly that pair: the difference was not in the ride.
What a shuttle changes
On a shuttle there is only ever one train on the course, so you cannot dispatch the next one until the first is back. The constraint stops being the interval and becomes the full cycle, which is usually two or three times longer. Pick the shuttle option above and type the complete ride time.
It is the single most expensive layout decision there is in capacity terms, and it is almost always made for the ride experience rather than for the queue. Bakunawa, announced with six world records, comes out at a third of the ride it replaces for exactly this reason.
What counts as good
Of the 163 European coasters I have measured with a declared capacity, the median is 950 riders per hour. A quarter are below 720 and a quarter above 1,200. Anything over 1,500 is genuinely rare, and the highest figure in the whole set — 3,200 riders per hour — belongs to a wooden coaster that opened in 1914.
So if your result is under 600, the ride will build a queue in any park with real attendance, however short the posted wait looks on a quiet Tuesday.
Where this falls short
The calculator gives a ceiling. Real operations lose dispatches to weather holds, loading wheelchairs, ride faults and single-rider sorting, and a realistic working figure is usually 10–20% below the arithmetic. It also assumes the park runs every train it owns, which on a weekday is often not true.
If you want the measured version rather than the modelled one, the declared capacities, the wait times and the cost per installed person-hour of 27 European parks are described here.