Random Coin Flip
Heads or tails, instantly.
Settle who kicks off, break a tie, or run a probability demo with a single tap. Flip one coin for a big HEADS or TAILS, or flip up to 100 at once to get a full tally plus the longest streak in the batch. Each flip is an exact, cryptographically secure 50/50, so neither face is ever favored.
Cliquez sur Flip the coin pour voir un résultat.
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Résultats récents
- Pas d'historique pour l'instant.
Questions fréquentes
Is the coin flip really 50/50?
Yes. Each flip draws from your browser's crypto.getRandomValues, so heads and tails are exactly equally likely — unlike a physical coin, which can be slightly biased by how it's tossed.
How many coins can I flip in one batch?
Up to 100. Batch results show every flip as a colored chip, a heads/tails tally, and the longest streak, and each flip is numbered in the CSV export.
What counts as the longest streak?
The most consecutive flips landing on the same face within your batch. Flipping 100 coins usually produces a surprisingly long streak, which makes it a good intuition-builder about randomness.
How can teachers use the batch mode?
Flip 100 coins to demonstrate the law of large numbers: the tally trends toward 50/50 while individual runs stay streaky. Students can copy each batch's results to compare them.
Do I need this if the site has a dice roller?
A coin is just a two-outcome draw, so this tool is faster for yes/no calls. For three or more outcomes, the dice roller or number generator fits better.
Tirages connexes
Further reading
- Best of three: when a single coin flip feels too harsh
One flip decides in half a second, but sometimes a binary call feels too abrupt to accept. Here's why flipping an odd batch and taking the majority changes nothing about the odds — and everything about how the loser feels about it.
- Why a long streak in 100 coin flips doesn't mean it's rigged
Flip a batch of 100 coins and you'll almost always see a streak of five or more somewhere in the run. That's not a broken randomizer — it's exactly what real randomness looks like. Here's the math behind streak length, and why 'it's due' is the wrong instinct.
- Two Choices, One Flip: When a Coin Beats a Wheel
Not every random decision needs a spinning wheel or a weighted list. When a call really is binary, a coin flip is the faster, fairer tool — here's how to tell the difference.