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Feedback on Coin Flip
Heads or Tails
Call heads or tails, then tap the coin. It is a true 50/50 toss: the side is picked by your browser’s secure random generator before the coin spins.
Flipping… Tap the coin or press Flip
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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.
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
Is heads or tails really 50/50 here?
Yes. Each toss is drawn with crypto.getRandomValues with no bias, so heads and tails each have exactly a 50% chance, whatever came up before.
Which side is heads on a coin?
Heads is the side with a portrait or main emblem, usually a head of state. Tails is the other side, often showing the value or a national symbol.
Should I call heads or tails?
It makes no difference with a fair toss. With real coins, studies found that a flipped coin lands on the side it started on slightly more often (about 51%), so call the side facing up when someone flips it.
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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