Is the coin genuinely fair?

Yes. Each flip has an exact 50% chance of heads and 50% of tails, drawn from the browser's secure random generator with no bias.

Why isn't my batch exactly half heads?

Real randomness clusters. A fair coin still lands, say, 46 heads out of 100 quite often — the split only approaches 50/50 over very large numbers of flips.

Time & RandomRuns in your browser

Coin Flip

Flip a fair coin for heads or tails, or flip many at once and see the running tally.

Ready to flip

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What this does

A fair 50/50 coin flip for settling decisions. Flip once with a quick animation, or flip a batch of coins and see how many landed heads versus tails, with the running totals kept across flips.

How to use it

1Press Flip for a single heads-or-tails result.
2Or set a count and flip many coins at once.
3Watch the heads/tails tally build up over your session.

Examples

Settle a decision with one flip
Flip 100 coins and compare the split to 50/50

Frequently asked questions

Is the coin genuinely fair?: Yes. Each flip has an exact 50% chance of heads and 50% of tails, drawn from the browser's secure random generator with no bias.
Why isn't my batch exactly half heads?: Real randomness clusters. A fair coin still lands, say, 46 heads out of 100 quite often — the split only approaches 50/50 over very large numbers of flips.

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