How to flip a coin online
- Click the coin or the button.
- Watch it spin and land on heads or tails.
- Keep flipping to see the running count.
A fair virtual coin
Each flip uses a cryptographic random number generator, so heads and tails are exactly 50/50 and every flip is independent of the last.
Streaks are normal
In 100 flips, a run of six or more of the same side is common. Random results often look less random than people expect.
Uses
Settle a decision, choose who starts a game or teach probability with the running count of results.
Frequently asked questions
Is the coin flip fair?
Yes. Each flip uses your browser's cryptographic random number generator, so heads and tails each have a 50% chance.
Why do I get several heads in a row?
Streaks are normal with random results. Each flip is independent, so the coin has no memory of the last one.
What are the odds of 5 heads in a row?
1 in 32, or about 3%. For 10 in a row it is 1 in 1,024.
Can I use it to decide something?
Of course β it's as fair as a real coin and always at hand.