Flip a coin online — heads or tails in one tap
No coin in your pocket? This coin flip tosses a realistic 3D coin on screen and lands on heads or tails with a true 50/50 chance. Use it to decide who goes first, settle a friendly bet, choose between two options, or run a quick probability experiment in a maths lesson.
Flip one coin with a satisfying spin, or up to 100 coins at once and see the heads and tails counted for you. A best-of-3 or best-of-5 mode plays a whole series for bigger decisions, and running statistics track your heads percentage and longest streaks — handy for seeing the law of large numbers in action.
How to use the Coin Flip
- Tap the coin or press Flip coin. The coin spins into the air and lands showing Heads (gold) or Tails (silver).
- To toss several coins at once, set Coins per flip to any number up to 100. The result shows how many landed heads and tails.
- For a decision that needs more than one toss, choose Best of 3 or Best of 5 and press Play. Flips continue until one side has a majority.
- Watch the statistics: total coins flipped, heads and tails percentages, the current streak and the longest runs.
- Use Reset statistics to start a new experiment, and the sound button to switch the coin’s ring on or off.
Coin Flip features
True 50/50
Each coin is decided by crypto.getRandomValues, your browser’s cryptographically secure generator — not by the animation and not by when you tap.
Realistic 3D toss
The coin rises, spins end over end and settles on the chosen face. Once you start flipping, devices with a capable graphics chip switch to a lit WebGL 3D coin. Reduced-motion settings skip straight to the result.
Up to 100 coins
Flip a whole handful at once to explore probability, with every coin shown and the totals counted.
Best of 3 or 5
Plays a full series automatically and announces the winner with the final score.
Streaks and percentages
Running statistics are saved on your device until you reset them, including the longest heads and tails runs.
Is a coin flip really 50/50?
This virtual coin is exactly fair: each flip takes one unbiased random bit from the browser’s secure random generator, so heads and tails each have probability ½ and every flip is independent of the ones before. A real coin is almost fair — a large 2023 study of 350,757 hand-tossed coins found that a coin lands on the same side it started on about 50.8% of the time, because of a slight wobble. Spinning a coin on a table can be much less fair than tossing it.
Independence matters: after five heads in a row, the next flip is still 50/50. Believing tails is “due” is the gambler’s fallacy.
What to expect from many flips
Random results are lumpier than people expect. These figures are exact probabilities for a fair coin:
| Event | Probability |
|---|---|
| Heads on one flip | 50% |
| Two heads in a row | 25% |
| Five heads in a row | 3.125% (1 in 32) |
| Ten heads in a row | about 0.098% (1 in 1,024) |
| Exactly 5 heads in 10 flips | about 24.6% |
| Exactly 50 heads in 100 flips | about 8.0% |
| A run of 5 or more of the same side somewhere in 100 flips | about 97% |
Classroom probability experiment
- Ask students to predict how often 100 coins will land exactly 50–50, then flip 100 coins several times and compare.
- Reset the statistics and flip 1,000 coins in batches of 100: the heads percentage drifts towards 50% even though individual batches vary.
- Look at the longest streak after 100 single flips — most people underestimate how long runs get.
- Extend the idea with the Dice Roller (six outcomes) or the Random Number Generator. For a quick yes/no, try Yes or No.
Coin Flip FAQ
Is this coin flip fair?
Yes. Each coin uses one random bit from crypto.getRandomValues, the secure random generator built into your browser, so heads and tails are exactly equally likely and every flip is independent.
Which side is heads?
Heads is the gold face marked H and tails is the silver face marked T. The result is also written underneath the coin.
How does best of 3 work?
The coin is flipped until one side wins twice (best of 3) or three times (best of 5). The series stops early when the result can no longer change, so best of 3 takes two or three flips.
Can I flip 100 coins at once?
Yes. Set “Coins per flip” to any number from 1 to 100. Every coin is shown, and the heads and tails totals are counted and added to your statistics.
Why did I get so many heads in a row?
Streaks are normal in random sequences. In 100 fair flips, a run of at least five identical results is very likely. Each flip is still 50/50 regardless of what came before.
Are my statistics saved?
Yes, on this device only. Totals, streaks and the last 60 coins are kept in your browser’s local storage until you press Reset statistics.