Coin Flip
Flip a coin - or many - with running heads/tails stats
100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.
About this tool
Flips a virtual coin (or multiple coins at once) and keeps a running tally of heads vs. tails results - useful for quick decision-making, settling a simple dispute, or just satisfying curiosity about how the odds play out over many flips.
How to use this tool
- Pick number of flipsFlip once or run multi-flip batches for quicker sampling.
- Start flippingGenerate heads/tails outcomes randomly.
- Review tallyTrack cumulative distribution over many flips.
- Reset for new trialClear history when starting a separate experiment.
Is a coin flip really 50/50?
Each virtual flip has an exactly equal chance of heads or tails, and earlier flips never affect the next one. Streaks of five or six heads in a row are normal over a long run - they feel unlikely, but they are what randomness looks like.
Flip 100 or 1,000 coins at once and watch the totals settle close to 50% each, which is the law of large numbers in action.
Key features
- Fast unbiased tie-breaker for everyday decisions.
- Multi-flip mode supports probability demonstrations.
- Running tally makes trend analysis easy.
- Useful for classes, games, and quick random picks.
Common uses
- Resolving yes/no choices fairly.
- Demonstrating probability in school lessons.
- Choosing starting player in games.
- Running quick randomization in experiments.
Tips for better results
- Use many flips to observe expected 50/50 trend.
- Separate independent tests with tally reset.
- Record sample size when comparing sessions.
- Avoid reading too much into short streaks.
Mistakes to avoid
- Assuming small samples must be exactly balanced.
- Combining unrelated sessions into one analysis.
- Ignoring that randomness includes streaks naturally.
- Treating virtual flip as legally binding where policies differ.
Frequently asked questions
Yes - flip several coins in one action and see the individual results for each, alongside the running overall statistics.
Each flip uses fair random generation, so over many flips the results should trend close to a 50/50 split between heads and tails, same as a fair physical coin.
Yes - a running tally of heads vs. tails across all your flips is typically shown, so you can see the overall distribution as you flip more times.
Streaks are normal in random sequences: in 100 fair flips a run of five or six of the same side is common. Each flip is independent, so a streak does not make the other side 'due'.
Assign each option a side and flip. If you feel disappointed by the result, that reaction tells you which option you actually wanted.
Short runs can be lopsided; the split only settles near 50/50 over hundreds or thousands of flips. Flip many coins at once and watch the running tally converge.