Coin Flip Streak Probability
Calculator
Expected streak occurrences
0.5
Results
- Expected streak occurrences
- 0.5
- Streak probability (%)
- 39.346934
- Single-attempt streak probability (%)
- 3.125
Gaming results
| Expected streak occurrences | 0.5 |
| Streak probability (%) | 39.346934 |
| Single-attempt streak probability (%) | 3.125 |
formula-map diagram
- Expected streak occurrences
- 0.5
- Streak probability (%)
- 39.346934
- Single-attempt streak probability (%)
- 3.125
Game math relationship
Formula
E ≈ (n − k + 1)×p^k ; P(≥1 streak) ≈ 1 − e^(−E) (Poisson approx.)= 0.5
Note
This is a simplified model: it applies the standard probability or game-math formula to the numbers you entered. Real games add pity systems, drop-rate tiers, rounding, server-side variance and balance patches, so treat the result as an estimate rather than a guarantee.