Flip a Coin

A fair coin, every time

Each flip uses your browser's cryptographic random number generator, so heads and tails each have exactly a 50% chance. Past flips have no effect on the next one: after five heads in a row, the next flip is still 50/50.

Fun facts about coin flips

• Streaks happen more than you'd think. In 100 flips, a run of 6 or more of the same side is more likely than not.
• Results even out slowly. Flip 10 coins and getting 7 heads is common. Flip 10,000 and you'll almost always land between 49% and 51%. Try the "flip many" box to see it.
• Real coins aren't quite perfect. Studies suggest a hand-tossed coin lands on the side it started on slightly more than half the time. This virtual coin doesn't have that bias.

When to flip a coin

Use it to settle a tie, decide who goes first, make a yes-or-no decision, or break decision paralysis. If you feel disappointed by the result, that tells you what you really wanted.