Flip a Coin: Heads or Tails
FlipACoin is a free online coin flip: tap once for heads or tails, flip with friends in live 1v1 rooms, or join a worldwide Global Flip every five minutes, with every result verifiable.
A fair coin lands heads 50% of the time and tails 50% of the time. Each flip is independent of the last.
Flip a coin now
What's your call?
Practice · not recorded · no coins
Coin flip generator & simulator: flip 1, 3, 10 or 100 times
Our coin flip generator tosses one coin or a whole batch: pick 1, 3, 10 or 100 flips and get every result in a single tap. One flip settles a quick question. Three flips are handy for a fast best of 3 or for checking a probability homework answer. Ten and 100 flips turn the page into a coin flip simulator, so you can watch heads and tails even out and see how long streaks really get. After a batch you get the heads count, the tails count and the longest run. A batch of 100 lands on exactly 50 heads only 7.96% of the time, and that is perfectly normal. It runs in your browser, free, with no sign up.
Play heads or tails with friends
To play heads or tails with a friend, open a private room in the FlipACoin app and send them the 6 character room code or the invite link. You both call a side, then watch the same coin flip live on your own screens, and the result shows up for both of you at the same moment. Pick a single flip, best of 3 or best of 5. If nobody is around, choose Play against a bot; bot opponents are always marked Bot, so you know who you are facing. Want a bigger crowd? The Global Flip runs a worldwide round every five minutes. Everything uses virtual coins only, so it stays a game and nothing more.
How our coin flip works (server result + Verify)
Every FlipACoin result is decided on our server, and you can check it yourself afterwards. Before the flip, the server publishes a hash of the secret seed that will decide the result, known as an HMAC SHA256 commitment. After the flip, it reveals the seed. Open the Verify page and your browser recomputes the result from those values, so you can confirm nobody, including us, changed it after the fact. Global Flip rounds also mix in drand, a public randomness beacon, so no single party controls the outcome. A digital coin also skips the small wobble of a hand flip. We call it fair and verifiable, because that is something you can actually test.
Heads or tails odds at a glance
| k | Specific side (e.g. heads) | Any side, counted from the first flip |
|---|---|---|
| 2 | 1 in 4 (25%) | 1 in 2 |
| 3 | 1 in 8 (12.5%) | 1 in 4 |
| 5 | 1 in 32 (3.13%) | 1 in 16 |
| 10 | 1 in 1,024 (0.098%) | 1 in 512 |
| 15 | 1 in 32,768 | 1 in 16,384 |
| 20 | 1 in 1,048,576 | 1 in 524,288 |
FAQ
Is a coin flip really 50/50?
Almost. A fair coin gives heads and tails a 50% chance each. Real hand flips carry a tiny physical bias: in a 2023 study of 350,757 flips, Bartoš and colleagues found coins landed on the same side they started on 50.8% of the time. Across all flips, heads and tails still came out at 50.0% each. A digital coin flip has no physical bias at all.
Can you flip a coin for me?
Yes. On FlipACoin you tap Flip and instantly get heads or tails, free and without an account. Each result is generated on our server and comes with a code you can check on the Verify page, so nobody, including us, can change it afterwards. You can also flip 100 times at once, play best of 3, or ask a yes-or-no question.
Is an online coin flip random?
On FlipACoin, every result is fair and verifiable. A digital coin has no same-side wobble, so the real question is whether you can trust the site. Our server decides each flip and publishes a commitment, a cryptographic hash, before it happens. Afterwards it reveals the secret seed, so you can recompute the result in your browser on the Verify page and confirm nobody changed it.
Does FlipACoin involve real money?
No. FlipACoin uses virtual coins only. They can't be bought, sent to other players or swapped for money, and you never risk coins on a result, so nothing of real value can be won or lost. Coins come only from playing, and they unlock every coin theme and effect. The only purchase is an optional one-time Remove Ads. Players under 13 can only use offline practice flips, with no account.