Does chance settle down?
Watch a coin’s running head rate wander towards its probability.
THE EXPERIMENTReady when you are
No steps yet. The observed result will appear here.
Your saved comparisons
Kept for this page session. Reloading clears them.
Share your setup
Try it together.
Share the page, or choose to include your setup. Entered names are always omitted from team-picker links.
How it works
How it works.
Running head rate = total heads / total flips.
Assumptions and limits
Independent biased or fair coin trials; convergence does not predict the next flip.