Flip a virtual coin for a fair heads or tails result, with a running tally.
How to Use Coin Flip Simulator
Click Flip Coin.
Read the result: Heads or Tails. The tally underneath counts each.
Click Reset Statistics to clear the tally.
Is it really 50/50?
Yes. Each flip uses one random bit from crypto.getRandomValues(), the browser's cryptographic random generator, so heads and tails are exactly equally likely and each flip is independent of the last. (A real coin, interestingly, lands slightly more often on the side it started on, according to a large 2023 study.)
Streaks are normal
Getting five heads in a row happens about once in every 32 tries, so streaks will turn up. After a run of heads, tails is not 'due'; the next flip is still 50/50. Flip a hundred times and watch the tally drift towards an even split, which is the law of large numbers at work.
Key Features & Practical Use Cases
Settling a quick decision or a friendly argument.
Deciding who goes first in a game or kicks off in sport.
Showing probability in a classroom with the running tally.
Frequently Asked Questions
Is an online coin flip fair?
This one is. Each result is one random bit from your browser's secure random generator.
Can the coin land on its edge?
No. Unlike a real coin, the virtual one is always heads or tails.
Does the tally affect the next flip?
No. Every flip is independent of the ones before it.
Is anything saved?
The tally only lasts while the page is open.
About OneClickly
OneClickly is a set of 119 free tools for PDFs, images, text, everyday math and code. They run in your browser, so the files and text you work with stay on your device.