Flip a fair coin. Track your heads vs. tails statistics.
Click the coin or the Flip button. The result is generated using a cryptographically random function in your browser, giving you a fair 50/50 outcome every time. You can flip multiple coins at once using the 5x, 10x, or 100x buttons to quickly see how randomness plays out over many trials.
Yes. This simulator uses your browser's built-in random number generator (Math.random()), which produces uniformly distributed results. Over a large number of flips, the percentage of heads and tails will converge toward 50/50. This is a demonstration of the law of large numbers: the more flips you do, the closer the ratio gets to the expected probability.
A coin flip is useful when you need to make a quick, unbiased decision between two options. Common uses include settling minor disagreements, deciding who goes first in a game, choosing between two restaurants or movies, or breaking a tie. Some people use the "coin flip trick": flip a coin and notice how you feel about the result. If you feel disappointed, go with the other option. Your gut reaction reveals your true preference.
Seeing several heads or tails in a row feels unusual, but streaks are a natural feature of randomness. In 100 coin flips, there is about a 97% chance you will see a streak of at least 6 in a row. In 200 flips, a streak of 7+ is very likely. This is called the "hot hand fallacy" in reverse: people expect random sequences to alternate more than they actually do.