Virtual coin toss game
No flips yet. Start flipping!
Fair Coin Probability
Each flip has exactly 50% chance for heads or tails. Over many flips, the results should approach 50/50 distribution.
Flipping a coin is the fastest way to settle a 50/50 decision, but a physical coin is not always within reach, and typing "random number 1 or 2" into a search bar feels like a cop-out. This coin flipper solves that by simulating a real coin toss right in the browser, complete with a spinning animation that mimics the arc and tumble of an actual coin before it settles on heads or tails. It works for anything a real coin would: picking who goes first in a game, breaking a tie between two restaurant choices, running a quick classroom demo of probability, or just deciding whether to take the stairs or the elevator.
Press Flip Coin and the coin turns over for the length of time set in Flip Speed (half a second to three seconds), then "Heads!" or "Tails!" appears underneath, so there's no ambiguity about the outcome the way a coin rolling under the couch can cause. Recent Flips lists your last 20 tosses with their numbers, which is handy if you're settling a best-of-five with a friend. The Statistics panel tallies heads and tails with percentages and also tracks streaks: the current run and the longest run of heads and of tails so far.
For more than a single decision, Auto Flip runs up to 100 tosses in a row. That makes it a low-stakes way to illustrate the law of large numbers: after 10 flips a 70/30 split is nothing unusual, but run 100 and the heads percentage in the Statistics panel lands between 40% and 60% about 96% of the time. The streak counters make a second lesson just as visible — runs of five or six of the same side turn up far more often than most people expect.
Get an instant, animated heads-or-tails result and track your flip history in the browser.
In Settings, choose how long the coin spins, from Fast (0.5s) to Very Slow (3s). Standard (1.5s) is the default.
Click the Flip Coin button under the coin. The coin turns over several times and a short click plays unless you untick Sound Effects.
When the coin stops, "Heads!" or "Tails!" appears under it. Heads shows a crown, tails an eagle.
Recent Flips lists your last 20 tosses, newest first, with their numbers. Statistics shows the heads and tails counts and percentages, the current streak and the longest streak of each side.
Set Auto Flip Count (up to 100) and press Auto Flip to run a series, or press Reset in the Statistics panel to clear the counts and history.
A best-of-three still gives each person exactly a 50% chance; it just makes a single unlucky flip feel less final.
Each auto flip waits for the animation to finish, so 100 flips at Standard (1.5s) take closer to three minutes.
The chance of three heads in a row on a specific set of three flips is 1/2 × 1/2 × 1/2 = 12.5%.