DECIDE · LEAVE A LITTLE TO CHANCE
Coin Flip / Yes or No
Heads or tails. Yes or no. One fair choice.
Examples & tips ↓Recent results 0
Last 20 draws in this page only.
Loading tool…
PUT IT INTO PRACTICE
A fair coin settles a tie, not a question of fact
Use a coin when there are two acceptable alternatives and neither needs a different chance. Decide which option means Heads before you flip. The Yes / No label mode uses the same two-outcome process; it does not analyse a question or predict what will happen.
Example: decide whether to try a new lunch spot
First decide whether both outcomes are acceptable: Yes means trying the new place, No means keeping the usual plan. Load Yes / No mode and make one draw. Each label has probability 1/2. If you keep drawing until your preferred answer appears, you are applying a different rule from accepting one random decision.
Replaces current inputs and clears results and history. Names are fictional.
What to check: The result should be either Yes or No. Session totals count the two labels; changing label mode resets those totals. Recent results are a separate history and retain earlier draws until cleared.
A streak does not make the next result due
After four Heads in a row, the next independent flip still has a 1/2 chance of Heads. The generator does not compensate for a streak. In a specified block of five flips, all Heads has probability (1/2)^5 = 1/32. Five identical results of either kind has probability 2/32 = 1/16.
How to use session totals
Totals help with a small probability demonstration, but they are not a certificate that a source is fair. Ten flips need not contain exactly five of each result. A short run is noisy; do not keep resetting until a tidy balance appears and present that as representative.
Choose the procedure before seeing results
For a first-turn decision, a single flip is usually enough. If you agree to a best-of-three rule, define that rule beforehand and follow it. Use the wheel when there are more than two options instead of inventing an ambiguous chain of coin flips.
Limits to keep in mind
Only two equally likely labels are supported. The result contains no advice, forecast, or verification of external facts. Refreshing clears totals and history.
Curious about the method? Read how randomness, privacy and group planning work.
A few good questions
Should heads and tails alternate?
No. Streaks are normal. A short sequence does not have to contain equal numbers of heads and tails.
Another way to decide
A different kind of choice? There’s a tool for that.