How the coin flip works
Each flip draws a random value and calls anything below one half Heads, everything else Tails. That gives a true 50/50 split with no memory of previous flips. Flipping ten coins will not reliably give five heads — roughly a quarter of ten-flip runs land on 4 or 6 heads instead.
Over a long run the split evens out, but slower than most people expect: after 100 flips a gap of five or six either way is completely ordinary. The tool has no memory of earlier tosses, so a run of tails never makes heads ‘due’ — that belief is the gambler's fallacy.
Try the dice roller when you want the outcome decided a different way.
How to use it
Leave Number of flips at 1 for a simple yes-or-no decision, or raise it to see a whole sequence with a heads/tails tally. Press Flip for a new toss. If you would rather phrase your question directly, try the yes or no picker.
The random number generator covers the same ground with a different mechanism.
Randomness and security
Every result on this page is produced in your own browser with JavaScript's built-in Math.random() pseudo-random generator. That is perfectly fine for games, giveaways, classroom picks and decision-making, but it is not cryptographically secure — never use it to generate keys, tokens or anything protecting real money or private data. Nothing you type is uploaded; the page never sends your inputs anywhere.
If you want a different flavour of the same thing, try the spinning wheel picker.
Frequently asked questions
- Is the coin really 50/50?
- Yes. Heads and tails each have an exact 0.5 probability on every flip, independent of what came before.
- Why did I get five heads in a row?
- That happens about once every 32 runs of five flips. Streaks are a normal feature of fair randomness.
- Can I flip many coins at once?
- Yes, up to 200. The full sequence is listed along with the number of heads and tails.
- Can I use this to decide something important?
- It is fair for casual decisions, but it uses the browser's Math.random() and is not suitable for security or gambling systems.
- Are my flips stored anywhere?
- No. Every toss happens in your own browser and no result is sent to a server or logged. Refreshing the page clears the tally and starts you fresh.