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Bellkit

Flip a Coin Online

Heads or tails? Flip up to 10 coins, call it, play best of 3, or run 10,000 flips.

  • 100% free
  • No signup
  • Private: stays in your browser
  • Updated November 2026
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How to flip a coin online

  1. 1

    Press Flip, tap the coin, press the space bar, or turn on shake to flip on your phone.

  2. 2

    Pick a mode: Flip (up to 10 coins), Call it (guess before the flip), Best of 3, 5 or 7, or Lab for thousands of flips at once.

  3. 3

    Rename the sides for any decision, choose a gold, silver or Bellkit blue coin, and press F for the projector.

Heads or tails, with a lot more to play with

Flip a coin online for any quick, fair decision: who goes first, which side of a debate a team takes, or Pizza vs Tacos for Friday lunch. The coin spins in 3D and lands on a true 50/50, and every flip is independent of the last. Rename the two sides to whatever you're deciding, and the coin shows your words.

Call it turns the coin toss into a game. Choose heads or tails before each flip and build a streak of correct calls. Your best streak is saved, and a burst of confetti marks three, five and ten in a row. It's a fun way to show students that guessing well is luck, not skill: over many calls your hit rate drifts back toward 50%.

Best of 3, 5 or 7 settles bigger decisions. The score shows as dots for each side, and the first to win the majority takes the series. Flip several coins at once for games and probability lessons: two coins give HH, HT, TH or TT, so you can compare the chance of one head with the chance of two.

The Lab flips 100, 1,000 or 10,000 coins in an instant and draws the percentage of heads as the flips add up. Early on the line swings wildly; with more flips it settles near the dashed 50% line. That's the law of large numbers, shown in a way students remember. The Lab also finds the longest run of heads and tails, which is usually much longer than people expect.

Classroom ideas for a coin toss

  • Predict, then test

    Ask students to predict how many heads 1,000 flips will give and the longest streak, then run the Lab and compare.

  • Call it challenge

    Pairs take turns calling. Who has the longest streak by the end of the week, and is it skill or luck?

  • Two-coin probability

    Flip 2 coins 20 times and tally HH, HT and TT. Why does one of each come up twice as often?

  • Fair team decisions

    Use Best of 3 with the team names on the coin to decide who picks first.

  • Fractions and percents

    Turn the tally into a fraction, a decimal and a percent, then compare with the Lab.

  • Debate sides

    Name the sides Agree and Disagree, and let the coin assign each student a side to argue.

Frequently asked questions

Is this online coin flip really 50/50?

Yes. Heads and tails each have exactly the same chance on every flip, and each flip is independent of the ones before it. Run the Lab with 10,000 flips to see the result settle close to 50%.

Can I flip more than one coin at once?

Yes. In Flip mode, choose 1, 2, 3, 5 or 10 coins. The result shows how many landed on each side.

How do I flip a coin 100 or 1,000 times?

Open the Lab and press Flip 100, 1,000 or 10,000 times. You get the totals, percentages, the longest streak of each side and a chart of how the percentage settles.

How does best of 3 work?

Choose Best of and a series length. Flip until one side wins the majority: 2 of 3, 3 of 5 or 4 of 7. Then press New series to play again.

Can I change heads and tails to my own words?

Yes. Type any two words, like Pizza and Tacos or Team A and Team B, and the coin shows them.

Can I flip by shaking my phone?

Yes. On a phone, turn on Shake your phone to flip. iPhones ask for motion permission the first time.

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