How to flip a coin online
- Flip
Press Flip, tap the coin, or press the space bar.
- Watch it land
The coin tumbles in the air and lands on heads or tails. The result is written out under the coin as well.
- Flip more at once
Set Coins per flip to any number up to 10. Each coin is its own independent toss.
- Track the run
The tally counts every flip since you last reset, with your current streak and longest streak.
When to flip a coin
Two-way choices
Who drives, which movie, who gets the last slice. Any choice where both options are fine.
Sports and games
Kickoff, first serve, or who makes the first move in chess or checkers.
Probability lessons
Have the class guess how often 10 coins show exactly 5 heads, then flip 10 coins twenty times and compare.
Making up your mind
Assign each option to a side, flip, and notice whether you feel relief or regret.
Why streaks happen more than you expect
People expect heads and tails to take turns, so a run of five heads can feel rigged. It is not. In 100 fair flips, a run of five or more in a row happens almost every time, and a run of six or more happens about four times out of five. The coin also has no memory: after four tails, the next flip is still 50/50. The streak counter lets you see this for yourself.
Need more than two outcomes? Try the Dice Roller or put your options on the Spin the Wheel page. For a plain answer to a question, there is the Yes or No Wheel.
Frequently asked questions
Is this coin flip fair?
Yes. Each coin uses a value from crypto.getRandomValues, turned into heads or tails with the same unbiased method (rejection sampling) used across this site, so each side has exactly a 50% chance. Research on real coin tosses has found a slight tendency for a coin to land on the side that started facing up. This one has no such lean.
Does it save my tally?
Yes. The tally, streaks, and the last 40 flips are kept in this browser's local storage until you press Reset tally. Nothing is sent to a server.
How many coins can I flip at once?
Up to 10 per flip. The result card shows how many landed heads and how many landed tails.
Does it work on phones?
Yes. Tap the coin to flip it. Once loaded, it works offline too.