Flipping a fair coin gives heads or tails with a 50% chance each, and every flip is independent of the last. Flip it ten times and any exact sequence, such as ten heads in a row, has a chance of 1 in 1,024, or 0.0977%. This page flips one coin or a batch and tallies the results.
A coin toss is the quickest fair way to settle a two-way choice: who serves first, which restaurant, who takes the first shift. This page flips a virtual coin once or up to 500 times in a batch. For a batch it counts each side, gives the share that landed on the first side, finds the longest run of the same face, and lists every flip with a running share so you can watch it drift toward 50%. You can rename the two sides, for example to two names or two options. The draws come from the browser's random number source, which is fair for everyday choices but is not a certified draw for regulated lotteries or gambling.
Use the minus and plus buttons or type a count from 1 to 500.
Keep Heads and Tails or replace them with the two options you are choosing between.
The result shows the side for one flip, or the count of each side for a batch, with the longest run and a flip-by-flip table.
Result Result: 3 Heads, 7 Tails
First side count: 3
Second side count: 7
First side share: 30%
Longest run: 3 × Tails
Chance of this exact sequence: 0.0977%
Every particular pattern of ten flips, including ten heads, has the same 1-in-1,024 chance.
Result Result: Tails
First side count: 0
Second side count: 1
First side share: 0%
Longest run: 1 × Tails
Chance of this exact sequence: 50%
A single flip of a fair coin gives each side an even 50% chance.
P(one side) = 1/2; P(a specific sequence of n flips) = (1/2)^n
n1/2Each flip draws a random number between 0 and 1; below 0.5 is the first side, otherwise the second. Flips are independent, so the chance of any one exact sequence is one half multiplied by itself n times. The running share is the first-side count divided by the flips so far, and the longest run is the longest stretch of identical faces.
Yes. Each flip compares a uniform random number with 0.5, so both sides have the same probability. Over hundreds of flips the share settles near 50%, though small batches often stray from it.
For five flips the chance is (1/2)^5 = 1/32, about 3.1%. In a long batch, though, a run of five somewhere is quite likely; in 100 flips the longest run is usually around six or seven.
No. That belief is the gambler's fallacy. The coin has no memory, so the next flip is 50/50 no matter what came before.
Every exact pattern of n flips has the same chance, (1/2)^n. With 20 flips there are over a million equally likely patterns, so any single one, including the one you got, is rare.
It can, but for a standard coin it is extremely rare, estimated at roughly 1 in 6,000 for a US nickel. This virtual coin has only two outcomes.
Studies of human tosses find a slight bias toward the side facing up at the start, around 51%. A virtual flip has no starting face, so it avoids that bias.
Using this tool in an assignment, article or report? Copy a citation, or a link for your website.
Tools Directory Editorial Team. (2026, October 14). Flip a Coin. Tools Directory. Retrieved October 26, 2026, from https://tools.milunir.com/fun-random/pickers-wheels-and-dice/flip-a-coin/
Tools Directory Editorial Team. “Flip a Coin.” Tools Directory, 14 Oct. 2026, https://tools.milunir.com/fun-random/pickers-wheels-and-dice/flip-a-coin/. Accessed 26 Oct. 2026.
Tools Directory Editorial Team. “Flip a Coin.” Tools Directory. Last modified October 14, 2026. Accessed October 26, 2026. https://tools.milunir.com/fun-random/pickers-wheels-and-dice/flip-a-coin/.
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