Step-by-step instructions
Set the number of flips
Use one for a single toss or choose a batch for several independent flips. The maximum is 100.
Assign meanings before flipping
If heads and tails represent different options, agree on those meanings before seeing the result.
Flip and record the outcome
Select Flip coin. Use the order shown when interpreting a sequence and save the batch if you need it later.
Worked example
Twenty flips form a small classroom dataset. Students count Heads and Tails after saving the batch.
One valid result is shown below. Your generated outcome will vary.
Example settings
Number of flips: 20
Example result
1. Heads 2. Tails 3. Heads 4. Tails 5. Heads 6. Tails 7. Heads 8. Heads 9. Tails 10. Tails 11. Tails 12. Heads 13. Heads 14. Heads 15. Heads 16. Tails 17. Heads 18. Heads 19. Tails 20. Heads
Divide the number of heads by 20 to obtain the observed heads proportion. It may differ from 0.5 without implying an error.
State the experiment before collecting outcomes
Choose the sample size and what you will measure before generating. A total count and a run-length study need different records, so keep the sequence when order matters. The tool does not calculate cumulative statistics or retain earlier batches. Larger samples can still contain runs and do not guarantee an exact half-and-half split.
Settings and limits to check
Every flip independently selects Heads or Tails with equal probability. A batch is not forced to contain an equal number of each, and earlier outcomes do not make the opposite outcome due. Batch sizes range from 1 to 100. New generations replace the current display and do not keep cumulative counts.
Settings used in this example
Number of flips: 20
Keep a usable copy of the result
Use Copy to place the current result in your own notes, or Download to keep a text file. Keep the range, count, or other settings with the result when they are needed to interpret it. A new generation replaces the displayed result rather than adding to a saved history.
The tool runs in your browser and does not upload your input. Save the result before refreshing or leaving the page. If other people need to use the same outcome, share your saved copy rather than asking them to generate another independent result.
Frequently asked questions
Is a run of five heads impossible in a fair simulation?
No. Runs can occur. An individual run does not force the next outcome or by itself establish that the process is biased.
Will ten flips always contain five heads?
No. Five heads is one possible count, but independent flips can produce more or fewer.
Can several heads occur in a row?
Yes. Runs are possible in independent flips and do not force the next result to be tails.
What should I check in the worked example?
Divide the number of heads by 20 to obtain the observed heads proportion. It may differ from 0.5 without implying an error.