Coin Flip Simulator

This simulation flips a virtual coin as many times as you choose. The probability of getting heads on any single flip is 50%. But does that mean you will always get exactly 50% heads? Try it and see!

Things to Try

Flip 10 coins. What percentage of heads did you get? Is it exactly 50%?
Now flip 100 coins. Is the percentage closer to 50%?
Try 1,000 or even 10,000 flips. Watch how the percentage gets closer and closer to 50% as you add more flips.
This pattern is called the law of large numbers: the more times you repeat a random experiment, the closer your results get to the expected value.

Number of flips:

Cumulative Statistics (all flips so far)

Current Flip Results

Flip History (Last 5)

Disclaimer: these pages are educational demos provided as-is, with no warranty of any kind. The author is not responsible for any consequences arising from their use.

Send comments and bug reports to chris@chrisspackman.com.

Last updated: 2026-02-21

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.