How long is the Large Hadron Collider ring?
27 km. A proton laps that loop 11,245 times every second, at 99.9999991% of light speed.
How close would your guess have been?
In the game we ask it like this: “How many kilometres around is the ring of CERN's Large Hadron Collider?”
Type a number — scored exactly the way a round in the game is.
The answer
27km
27 km in other units
- 16.8 miles



