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Best of 3 Coin Flip
Settle it properly: keep flipping until heads or tails wins two out of three. Switch to best of 5 or best of 7 for bigger decisions.
Flipping… Tap the coin or press Flip
–
Longest streak
Difference from 50%
flips: (%) · (%)
Press Space to flip. The side is drawn with your browser’s secure random number generator before the coin moves.
More than two options? Try the Spin the Wheel, the Random Number Generator or the Dice Roller.
Version 1.1 Updated What's newHide changes
Release notes
-
v1.1 Latest
- Added an in-depth guide below the tool, written from what the tool actually does.
About the Coin Flip
Flip a virtual coin when you need a fair 50/50 decision. Each toss is drawn with your browser’s secure random number generator before the coin spins, so the animation never decides the result. Play a single flip, a best of 3, 5 or 7 series, or flip up to 10,000 coins at once to see how the share of heads settles near 50% and how long the longest streak gets. Your last 60 flips and their totals are kept in your browser.
How to use it
- 1 Choose Flip a coin, Best of or Many coins.
- 2 Call heads or tails if you like.
- 3 Tap the coin, press Flip or press the space bar.
- 4 Read the result and your running heads and tails count.
Frequently asked questions
How does best of 3 work?
The first side to win two flips wins the series, so it takes two or three flips. Best of 5 needs three wins and best of 7 needs four.
Is best of 3 fairer than one flip?
Both sides still have a 50% chance of winning. Best of 3 just feels fairer, because one lucky flip can’t decide it on its own.
Is this coin flip really random?
Yes. Each flip uses crypto.getRandomValues, the browser’s secure random number generator, so heads and tails each have exactly a 50% chance and no flip depends on the ones before.
Is an online coin flip as fair as a real coin?
It is fairer. Real coins are very slightly biased towards the side that faces up when flipped (about 51% in a 2023 study of 350,000 flips). The virtual coin has no such bias.
What are the odds of getting heads 3 times in a row?
1 in 8 (12.5%). Each flip halves the chance: 2 in a row is 1 in 4, 5 in a row is 1 in 32 and 10 in a row is 1 in 1,024.
After several tails, is heads more likely?
No. The coin has no memory, so heads is still exactly 50% on the next flip. Believing otherwise is called the gambler’s fallacy.
Can I use it to decide who goes first?
Yes. Let one person call heads or tails before the flip. For more than two people or options, use the spin the wheel tool instead.
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