Coin Flip
Flip a fair virtual coin to settle a decision or decide who goes first.
Your input stays in your browser. Nothing is uploaded.
—
About this tool
Each flip is an independent draw with a 50% chance of heads and a 50% chance of tails, taken from the browser's cryptographic random generator. Earlier results do not affect the next one, so a run of five heads does not make tails more likely.
How to use it
- Press Generate to flip.
- Press it again for another flip.
P(n heads in a row) = 0.5ⁿ
Examples
Three heads in a row
The chance is 0.5³ = 12.5%, or 1 in 8.
Best of three
Flip up to three times; the first side to win two flips wins.
FAQ
Is a real coin exactly 50/50?
Studies of real coin tosses suggest a slight bias towards the side facing up at the start. This virtual coin has no such bias.
Can it land on its edge?
No. Only heads or tails.
Is anything stored?
No.