Coin Flip

On browsers with Web Crypto, the calculator uses crypto.getRandomValues to select heads or tails. That gives each outcome an equal chance. If Web Crypto is unavailable, it falls back to Math.random(), which is pseudorandom rather than cryptographically secure.

Each flip is exactly 50/50, a 0.5 probability for each side. Every flip is independent, so a run of five heads does not make tails any more likely on the sixth flip. Over many flips the observed ratio converges toward 50%, but small samples can deviate noticeably.

At 100 flips you will often see a heads rate somewhere between 42% and 58%. At the maximum of 1,000 flips the range typically tightens to about 47% to 53%. Run several 1,000-flip batches to watch the totals cluster near 500.

Set the number of flips to 3 and read the result. Whichever side lands more often wins, since two or more out of three decides it.

Enter a whole number from 1 to 1,000. The calculator rejects zero, negative values, decimals, and counts above 1,000 so the result stays readable.