How to flip a coin online
Tap the coin or press Flip. The coin spins and lands on heads or tails. To flip many coins at once — for a probability experiment or a best-of-many decision — set the number of flips (up to 1,000). The counters keep a running total until you reset them.
Is an online coin flip fair?
Yes — arguably fairer than a real coin. Each flip uses your browser’s cryptographically secure random number generator, giving exactly a 50% chance of heads and 50% chance of tails. Studies of real coin tosses have found a slight bias (about 51%) toward the side that was facing up at the start, and real coins can be slightly unbalanced. A virtual flip has no such bias.
Probability in action
Flip once and anything can happen. Flip 10 times and you might easily get 7 heads. Flip 1,000 times and the heads percentage will almost always land between 47% and 53% — this is the law of large numbers. It’s a great classroom demonstration: try 10, 100 and 1,000 flips and watch the percentage settle near 50%.
| Question | Probability |
|---|---|
| Heads on one flip | 1/2 = 50% |
| Two heads in a row | 1/4 = 25% |
| Three heads in a row | 1/8 = 12.5% |
| Ten heads in a row | 1/1024 ≈ 0.1% |
Past flips never affect the next one. After five heads in a row, the next flip is still 50/50 — believing otherwise is called the gambler’s fallacy.
When to use a coin flip
Deciding who goes first, choosing between two options, settling friendly disputes or making a quick call when both choices are equally good. More than two options? Use the wheel spinner or dice roller.
Frequently asked questions
Is the coin flip 50/50?
Yes. Each flip has exactly a 50% chance of heads and 50% of tails.
Can I flip multiple coins?
Yes. Set the number of flips (up to 1,000) to toss many coins at once.
Does a previous result affect the next flip?
No. Every flip is independent.
Which side should I call?
It doesn’t matter — both sides have exactly the same chance.