How the coin flip works
Enter how many times to flip and the tool simulates fair coin tosses using your browser secure randomness. It tallies heads and tails, shows the percentage that came up heads, and lists the full sequence. Flip once to settle a decision, or many times to watch probability in action.
Heads, tails, and probability
A fair coin has a fifty fifty chance on each flip, independent of what came before. Over a few flips the split can be lopsided, but as you flip more times the heads percentage tends to settle near fifty percent. This is the law of large numbers, and flipping a few hundred times here demonstrates it nicely.
The gambler fallacy
Each flip is independent, so a run of heads does not make tails more likely next time; the coin has no memory. Believing otherwise is the gambler fallacy. The sequence display makes this concrete: you will often see surprising streaks even though each individual flip remains an even chance.
Everyday uses
Use a coin flip to make a quick yes or no decision, choose who goes first, break a tie fairly, or teach basic probability. Flipping many at once is a fast way to generate a random binary sequence or to show how sample size affects how close results get to the expected average.
Frequently asked questions
Is the coin fair? Yes, each flip is an independent fifty fifty chance using secure randomness.
Why did I get a long streak? Streaks are normal in random sequences; each flip is independent of the last.
Will heads always reach 50 percent? It tends toward 50 percent as the number of flips grows, but short runs can be lopsided.
Related tools: Dice Roller, Random Number, Random Picker.