Coin Flip Simulator

Need a quick heads or tails? This coin flip simulator tosses a fair virtual coin with a smooth 3D flip. Call it before you toss, settle an argument best of five, or flip a thousand coins at once to watch the odds even out.

How to play Coin Flip Simulator

• Flip: tap the coin, press Flip coin or hit Space. The coin spins in the air and lands on heads or tails.
• Want to test your luck? Pick Call heads or Call tails first. After the toss you see whether your call was right, and your hit rate is tracked.
• Best of: choose best of 3, 5, 7 or 9. Heads and Tails race to win the majority, so in a best of 5 the first side to 3 wins the match.
• Many flips: toss 10, 100 or 1,000 coins in one go and see the split, the percentages and the longest run of each side.
• Every flip adds to your stats: total flips, heads and tails percentages, your current streak, the longest streak of each side and the last 60 results.

Controls

• Tap / click the coin, or press Space / Enter — flip
• H / T — call heads or tails before a flip
• Reset stats clears your history on this device

Tips

• Every flip is independent. After five heads in a row, the next flip is still a 50/50 chance.
• Flip 1,000 coins a few times: the split lands close to 50% almost every time, but long runs of 8 or more are common.
• Settling a choice between two people? Use best of 3 so one lucky toss doesn’t decide it.

FAQ

Is this coin flip really random?

Yes. Each toss uses your browser’s built-in cryptographic random number source, so heads and tails each have exactly a 50% chance and no flip depends on the one before.

What are the odds of getting heads 5 times in a row?

One in 32, or about 3%. Each extra head in the run halves the chance: 10 in a row is about 1 in 1,024.

How does best of 5 work?

Heads and Tails each need three wins. The match ends as soon as one side gets there, so it can take three, four or five flips.

Why is my heads percentage not exactly 50%?

Short runs wobble a lot. The more you flip, the closer the split gets to 50/50. Try the 1,000-flip button to see it.