Interpret a short streak
- Input or situation
- Five flips all land heads.
- Result
- That particular sequence has probability 1 in 32.
The chance is (1/2)⁵. Even after that streak, the next flip still has a one-half chance of heads.
Random
Coin flip — heads or tails, a true 50/50
Get heads or tails for a quick tie-break, or flip a batch and watch the tally. Agree what each side means before flipping.
Runs in your browser — your input is not uploaded to ToolsNow.
Flip to get heads or tails.
The result is generated locally in your browser.
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Each flip is a separate 50/50 draw. Several heads or tails in a row are normal; earlier results do not make either side due next. A short run need not finish close to 50%.
How to use
- Set Coins per flip. Leave it at 1 for a decision, or enter up to 100 for a batch.
- Flip the coin. Read This flip for the latest result and Running total for all flips in this session.
- Start a fresh tally when needed. Reset tally clears the results before your next experiment.
Questions
Does a run of heads make tails more likely next?
No. Each flip is a fresh 50/50 draw using the browser’s cryptographic random source. Streaks happen; the tool does not balance the next result to compensate.
Why is Heads share not exactly 50%?
Equal chances do not promise equal counts. The percentage tends to get closer to half over many flips, but it can move away again and need not hit 50% in your session.
Where are the rest of my batch’s coins?
The display shows up to 40 individual coins. For larger batches, This flip and Running total still include every generated result.
Examples and checks
Choose one coin for an informal decision or a batch to compare heads and tails. Agree what each side means before flipping.
Compare a batch
- Input or situation
- 100 independent flips
- Result
- 50 heads is the expected count, not a guaranteed count.
Repeated batches vary. A result above or below 50 is expected and does not by itself show that the generator is biased.
Before you use the result
- The running tally includes earlier flips on this page. Use Reset tally when starting a new round.
- A short run does not have to split evenly. Earlier results do not make heads or tails “due” on the next flip.
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