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TabBench

Coin Flip

Flip a fair virtual coin for heads or tails, or flip up to 100 at once. Rename the sides to Yes and No, see your streaks and keep a running tally.

Runs in your browser. Nothing you add is uploaded.

What the Coin Flip does

Flipping a coin is the oldest way to settle a choice between two options, and a good virtual coin should be as fair as a real one. This one is. Each toss takes a random bit from your device's cryptographic generator, so heads and tails are exactly equally likely and no flip depends on the one before. Flip a single coin for a decision, or up to 100 at once to see how chance behaves, rename the sides to your own two options, and keep a tally of heads, tails and streaks for the session.

How to flip a coin online

  1. Press “Flip the coin”. The coin spins and lands on heads or tails.
  2. To decide between two things, rename the sides under Options: for example Pizza and Sushi, or Yes and No.
  3. Set the number of coins to flip several at once. The result shows how many of each side came up.
  4. Watch the session panel for the running totals, percentages and longest streak.
  5. Press Reset to clear the tally and start again.

The Coin Flip runs entirely in your browser — nothing you enter is uploaded, stored, or logged.

When to use it

Settling a tie

Kick-off choices, who goes first in a game, which of two equal options to pick: name the sides and let the coin decide.

Teaching probability

Flip 10, 100 or 1,000 coins and compare what happens with what you expect. It is a hands-on way to see the law of large numbers: the proportion of heads drifts towards 50% as flips accumulate, though the gap in counts can still grow.

Running a quick experiment or game

Tabletop games, classroom activities and stats exercises often need many independent flips quickly. Flip up to 100 in one go.

Good to know

  • A streak of five or six in a row is normal in 100 fair flips. Past results do not change the next one.
  • If you feel disappointed by the result, that tells you which option you really wanted.
  • Turn on reduced motion in your system settings and the coin lands without the spin.
  • For more than two options use the Random Name Picker or Dice Roller instead.
  • Real coins are very slightly biased towards the side they start on (about 50.8% in a large 2023 experiment), which a virtual coin does not suffer from.

Frequently asked questions

Is this coin flip really 50/50?

Yes. Each flip takes one random bit from your device's cryptographic generator, so heads and tails are exactly equally likely and every flip is independent of the last.

Why do I sometimes get long streaks?

Streaks are normal in random sequences. In 100 fair flips the longest run is usually six or seven in a row. A run does not make the opposite side more likely next time.

Can I use it to make a real decision?

Yes. Rename the sides to your two options and flip. Many people notice how they feel about the result: if you are hoping for the other side, that is your answer.

Is a digital coin flip as fair as a real one?

It can be fairer. A real coin is fractionally more likely to land on the side it started facing, while a cryptographic random bit is an exact 50/50 with no physical bias.

Does the animation affect the result?

No. The result is drawn first and the coin is then animated to land on it. The spin is decoration only.

Are my flips stored or shared?

No. The tally lives in the page and disappears when you close it. Only your side names are remembered on your device for a few days.