What are the benefits of Consecutive Win & Miss Probability?

Three calculation modes (All Win / All Miss / At Least Once) for diverse probability scenarios. Preset buttons (1%, 3%, 5%, 10%, 30%, 50%) for instant common gacha rate input. Visual probability table (1-20 trials) with bar graphs for easy understanding. Intuitive approximation display (e.g., 'about 1/100') for quick comprehension. Real-time computation with instant updates to any input change. Browser-only processing ensures privacy with zero server data transmission.

Is Consecutive Win & Miss Probability free?

Yes, it is completely free to use, and no registration is required. Tool processing happens entirely in your browser, and your input content and uploaded files are not sent to a server. Our first-party improvement metrics use no cookies, visitor IDs, or session IDs and store only normalized page paths and daily counts for fixed event IDs.

Consecutive Win & Miss Probability

Calculate consecutive wins, misses, and at-least-one odds instantly

当選確率と試行回数を入力

1回の当選確率 (%)

試行回数

計算モード

よく検索される連続確率の早見表

「75%を5回連続で引く確率は？」→ 約23.7%。「当選確率1%を100回連続で外す確率は？」→ 約36.6%。「100回中に1回以上当たる確率は？」→ 約63.4%。よく使われる組み合わせを一覧にしました。表にない数値は上の計算機に入力してください。

N回連続で全部当たる確率（p^n）

1回の確率	2回連続	3回連続	5回連続	10回連続
10%	1%	0.1%	0.001%	ほぼ0%
25%	6.25%	1.56%	0.098%	ほぼ0%
50%	25%	12.5%	3.13%	0.098%
75%	56.3%	42.2%	23.7%	5.63%
90%	81%	72.9%	59%	34.9%

N回連続で外す確率（(1-p)^n）

1回の当選確率	2回連続	3回連続	5回連続	10回連続
1%	98.01%	97.03%	95.1%	90.4%
5%	90.25%	85.74%	77.38%	59.87%
10%	81%	72.9%	59.05%	34.87%
30%	49%	34.3%	16.81%	2.82%
50%	25%	12.5%	3.13%	0.098%

N回中に1回以上当たる確率（ガチャ・抽選）

排出率	10回	30回	50回	100回	300回
0.5%	4.89%	14%	22.2%	39.4%	77.8%
1%	9.56%	26%	39.5%	63.4%	95.1%
3%	26.3%	59.9%	78.2%	95.2%	99.99%
5%	40.1%	78.5%	92.3%	99.4%	ほぼ100%
10%	65.1%	95.8%	99.5%	ほぼ100%	ほぼ100%

※ 「100回引いても当たらない」は排出率1%なら約36.6%の確率で起こります。ガチャの「N回で必ず当たる」わけではない点にご注意ください。

Quick Reference: Common Streak Probabilities

"What are the odds of hitting 75% five times in a row?" — about 23.7%. "Missing a 1% hit 100 times in a row?" — about 36.6%. "Getting at least one hit in those 100 tries?" — about 63.4%. Common combinations are listed below; enter other values in the calculator above.

Probability of winning N times in a row (p^n)

Single odds	2 in a row	3 in a row	5 in a row	10 in a row
10%	1%	0.1%	0.001%	≈0%
25%	6.25%	1.56%	0.098%	≈0%
50%	25%	12.5%	3.13%	0.098%
75%	56.3%	42.2%	23.7%	5.63%
90%	81%	72.9%	59%	34.9%

Probability of missing N times in a row ((1-p)^n)

Single win odds	2 misses	3 misses	5 misses	10 misses
1%	98.01%	97.03%	95.1%	90.4%
5%	90.25%	85.74%	77.38%	59.87%
10%	81%	72.9%	59.05%	34.87%
30%	49%	34.3%	16.81%	2.82%
50%	25%	12.5%	3.13%	0.098%

Probability of at least one hit in N tries (gacha / lottery)

Drop rate	10 tries	30 tries	50 tries	100 tries	300 tries
0.5%	4.89%	14%	22.2%	39.4%	77.8%
1%	9.56%	26%	39.5%	63.4%	95.1%
3%	26.3%	59.9%	78.2%	95.2%	99.99%
5%	40.1%	78.5%	92.3%	99.4%	≈100%
10%	65.1%	95.8%	99.5%	≈100%	≈100%

* With a 1% drop rate, going 100 pulls with zero hits happens about 36.6% of the time. N tries never guarantees a win.

About Consecutive Win & Miss Probability

The Consecutive Win & Miss Probability Calculator computes repeated-trial probabilities from a single win rate and number of trials. It features three calculation modes, plus quick-reference tables for common combinations such as "75% five times in a row (about 23.7%)," "missing a 1% hit 100 times in a row (about 36.6%)," and "at least one hit in those 100 pulls (about 63.4%)."

Mode 1: All Wins Probability (p^n) — Calculates the probability of winning in all consecutive trials. For example, with a 50% win rate, the probability of winning 3 times in a row is 12.5%, declining exponentially. Useful for analyzing gacha reroll success rates, game winning streaks, and consecutive luck predictions.

Mode 2: All Misses Probability ((1-p)^n) — Calculates the probability of missing every one of N consecutive trials. For example, missing a 1% gacha hit 100 times in a row has a probability of about 36.6%. Use it for gacha droughts, lottery misses, and game losing streaks.

Mode 3: At Least Once Probability (1-(1-p)^n) — Calculates the probability of "at least one win" in N trials. For instance, with a 1% gacha rate, pulling 100 times yields approximately 63.4% chance of getting the target character. This intuitive calculation applies to gacha simulations, lottery odds analysis, and gambling probability forecasting.

Common Use Cases: - Game gacha simulation (estimate spending needed to guarantee a character) - Consecutive misses in gacha pulls, lotteries, and repeated draws - Lottery and sweepstakes probability analysis - Gambling outcome prediction and bankroll planning - Probability and statistics education

Features: - Real-time calculation with instant result updates - Three modes for all wins, all misses, and at least one win - Preset buttons for common gacha rates (1%, 3%, 5%, 10%, 30%, 50%) - Automatic probability table for 1-20 trials with bar graph visualization - Approximate rate display (e.g., "about 1/2") for intuitive understanding - Browser-only processing ensures complete privacy — no server transmission

How to use Consecutive Win & Miss Probability

Enter the single-win probability (%) using the input field or preset buttons
Enter the number of trials (whole numbers only)
Select your calculation mode: 'All Win (p^n)' for consecutive success, 'All Miss ((1-p)^n)' for consecutive misses, or 'At Least Once' for at least one success
View real-time results with a comprehensive 1-20 trial probability table showing the probability progression

Benefits of Consecutive Win & Miss Probability

Three calculation modes (All Win / All Miss / At Least Once) for diverse probability scenarios
Preset buttons (1%, 3%, 5%, 10%, 30%, 50%) for instant common gacha rate input
Visual probability table (1-20 trials) with bar graphs for easy understanding
Intuitive approximation display (e.g., 'about 1/100') for quick comprehension
Real-time computation with instant updates to any input change
Browser-only processing ensures privacy with zero server data transmission