Heads or tails is a fair coin toss: each side has a 1 in 2 chance, and earlier tosses do not change the next one. Toss once to settle a choice, or toss up to 100 times to see how counts wander around half. Three heads in a row has a probability of (1/2)³ = 12.5%.
A coin toss is the oldest way to settle a two-way choice: who kicks off, who picks the film, who pays for coffee. When nobody has a coin, this page tosses one using your browser's random number source. Call heads or tails before you toss and the page tells you whether the call won. Set more than one flip and every result is listed in order, the headline gives the first toss and the heads and tails totals, and the panel shows the expected head count and the chance that every toss in that set came up heads. Teachers use the multi-flip view to show that short runs rarely split exactly 50/50. One limit: a virtual coin is fair by construction, so it cannot model a bent or weighted physical coin.
Pick Heads or Tails before tossing, or leave it on No call to just see the result.
Use the − and + buttons to toss from 1 to 100 times in one go.
The headline gives the first flip, your call's outcome and the heads and tails totals; the table lists every flip in order.
Result Result: Tails (1 heads, 2 tails)
Flips tossed: 3
Expected heads: 1.5
Chance every flip is heads: 12.5%
Three tosses show each result in order; any single run of three heads has a 1 in 8 chance, 12.5%.
Result Result: Tails — your call loses
Flips tossed: 1
Expected heads: 0.5
Chance every flip is heads: 50%
A single toss settles a choice; calling heads wins half the time.
Result Result: Tails — your call wins (7 heads, 3 tails)
Flips tossed: 10
Expected heads: 5
Chance every flip is heads: 0.0977%
Ten heads in a row happens once in 1,024 sets of ten tosses, about 0.0977%.
P(all heads in n flips) = 0.5ⁿ; expected heads = n × 0.5
nn × 0.5Each flip draws a random number between 0 and 1; below 0.5 is heads, otherwise tails. Flips are independent, so the chance of any exact sequence of n results is 0.5 raised to n, and the long-run average of heads is half the flips.
Yes. Each toss compares a random number from the browser's cryptographic source with 0.5, so heads and tails are equally likely, and no toss depends on the one before.
Almost. A 2023 study of 350,757 hand tosses by Bartoš and colleagues found coins land on the side they started on about 50.8% of the time, a small bias from the way people flip.
More often than people expect. In 100 tosses the longest run of one side is usually around six or seven, so a streak of five heads is not a sign that something is wrong.
It is 0.5 to the power of 10, which is 1 in 1,024, or about 0.0977%. The page shows this figure for whatever number of flips you set.
No. The call is only compared with the first flip after it lands, so calling heads or tails wins half the time either way.
Using this tool in an assignment, article or report? Copy a citation, or a link for your website.
Tools Directory Editorial Team. (2026, October 10). Heads or Tails. Tools Directory. Retrieved October 26, 2026, from https://tools.milunir.com/fun-random/random-picks-and-ideas/heads-or-tails/
Tools Directory Editorial Team. “Heads or Tails.” Tools Directory, 10 Oct. 2026, https://tools.milunir.com/fun-random/random-picks-and-ideas/heads-or-tails/. Accessed 26 Oct. 2026.
Tools Directory Editorial Team. “Heads or Tails.” Tools Directory. Last modified October 10, 2026. Accessed October 26, 2026. https://tools.milunir.com/fun-random/random-picks-and-ideas/heads-or-tails/.
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