What is an online coin flip?
An online coin flip is a virtual coin toss: press a button and get heads or tails, each with an equal chance. It's the quickest fair way to settle a two-way choice, decide who starts a game, or pick between two options when you can't choose.
Beyond single tosses, this coin can flip 10 or 100 times in one go and keeps a running tally with percentages and the current streak, which makes it a handy classroom demonstration of probability and of how often long streaks appear by pure chance.
How to use the Coin Flip: Heads or Tails
1.Flip
Press Flip the coin for a single toss with an animated coin.
2.Flip many
Flip 10 or 100 times at once to see how the results spread.
3.Read the tally
Heads, tails, their percentages and the current streak update as you go.
Example: 100 flips
What to expect from a 100-flip batch:
- Expected heads
- about 50
- Typical range
- 40 to 60 heads, most of the time
- A streak of 6 or more
- more likely than not
Landing exactly 50 heads is actually uncommon, at about an 8% chance.
Fair tosses and streaks
Every flip is an independent 50/50 draw from your browser's cryptographic generator. A run of five heads doesn't make tails more likely next: believing it does is the gambler's fallacy.
Streaks are more common than people expect. In 100 fair flips, a run of at least six of the same side happens more often than not, which surprises most people when they try the 100-flip button.
Frequently asked questions
Is the coin flip really 50/50?
Yes. Each toss uses a fair cryptographic random choice between heads and tails.
Why did I get heads several times in a row?
Streaks are normal in random sequences. Over many flips the split tends toward half and half.
Can I flip more than one coin?
Use Flip 10 times or Flip 100 times; each flip is a separate toss.
Is a real coin toss fair?
Very nearly. Studies of real tosses found a slight bias toward the side facing up at the start, which a virtual coin doesn't have.
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