Coin Toss – Frequently Asked Questions

Yes. The result is determined by Math.random() which produces a uniformly distributed value. The threshold is exactly 0.5 — below 0.5 gives heads, at or above gives tails (or vice versa). Over many flips, you'll see results cluster close to 50/50, though short runs will show natural variance. A digital coin flip is actually fairer than a physical coin — real coins have slight physical bias depending on which side faces up before the toss.

Yes — set the number of coins and flip them all simultaneously. The results show each coin's outcome individually, plus a summary count of heads and tails. This is useful for probability demonstrations: flip 20 coins and see how the heads/tails distribution compares to the expected 10/10. The distribution rarely lands exactly on 50/50 in small samples, which itself is an interesting teaching point.

Yes — share your screen on a video call and flip live. Both parties see the same result in real time. For the flip to feel mutually fair, have one person declare their call before you share your screen and flip. That way neither party can accuse the flipper of timing the result. Alternatively, both people load the page and flip simultaneously, then compare.

Sometimes you don't have a coin — particularly when using a phone or laptop for a call or meeting. Digital coin flips are also useful when the dispute involves people who aren't physically together, when you want an easily recordable result, or when you want to flip a coin that isn't biased toward one side (a common issue with poorly manufactured coins or coins that are slightly bent).

Yes — just keep flipping. The results history shows all previous flips in sequence so you can track a best-of-3 or best-of-5 series. Each flip is independent — past results have no influence on future ones. This is one of the things people often get wrong about coin flips: getting heads three times in a row doesn't make tails "due" on the fourth flip.

Mechanically they're the same — a binary random outcome. The coin flip is better when the framing matters: "heads we go to Thai, tails we get pizza." The yes/no wheel is better when the question is naturally phrased as a question: "Should we leave now?" Both use the same underlying randomness. Psychologically, the coin flip feels more neutral and the wheel feels slightly more deliberate.

Yes — set the count to 20, 50, or 100 and flip all at once. Recording the heads/tails distribution over many flips is a practical way to demonstrate the law of large numbers in a classroom. Short runs (10 flips) show high variance; longer runs (100+ flips) converge closer to the expected 50/50 split. This makes for a quick visual demonstration of probability theory.