Streak Calculator
Probability of at least one streak of length K in N trials.
Enter win rate, number of bets, and desired streak length. Uses a standard run-length approximation.
Streak Calculator
Adjust inputs to see updated results.
Table of Contents
How to Use This Calculator
Set an independent win probability, number of bets, and target streak length. The tool outputs a rough probability of seeing at least one winning streak of that length somewhere in the sequence.
Win probability
Chance to win each bet—same for every trial in this simple model.
Number of bets
How many sequential independent trials you observe.
Streak length
Minimum consecutive wins you care about (e.g. 5).
Heuristic warning
The implementation uses a fast approximation—good for intuition, not exact combinatorics at tiny probabilities.
What It Estimates
Long winning streaks become more likely as sample size grows even when each bet is only slightly better than a coin flip. This tool visualizes how often a streak of length K might appear in N tries.
Examples
Example 1 — Defaults
p = 0.5, N = 10, streak = 4. The tool prints a rough probability—compare to the live readout.
Example 2 — Edge bettor
p = 0.55, N = 100, streak 6—see how often heater-length runs might appear even with modest edge.
Example 3 — Losing streaks
For losses, use q = 1 − p as “success” probability or mirror the logic mentally—this UI frames winning streaks.
Frequently Asked Questions
No—it's a heuristic for quick intuition. Exact run distributions use more elaborate formulas.
Yes—real betting series can be correlated; adjust expectations.
Not for streak frequency—only for bankroll impact when streaks hit.
With many trials, even moderate streak lengths become plausible—avoid overfitting narratives.
This calculator does not input odds—only win probability. Convert from odds externally.
