Expected Pulls for Target Calculator

Calculate expected number of gacha pulls to reach a target confidence level. Enter rate, pity, and desired confidence percentage.

%
%
Pulls for 90% Chance
90
Budget at least this many to have 90% confidence
Expected Pulls (63%)
90
Average pulls for one copy based on base rate
Median Pulls (50%)
90
Half of players get it by this point
Near-Certain (99%)
90
Almost guaranteed by this many pulls
Total for 1 Copies
90
90 pulls x 1 copies at 90% each
Primogems Needed
14,400
90 pulls x 160 per pull
Expected Cost (1 copy)
14,400
90 avg pulls x 160 Primogems
Soft Pity Window
74 - 90
Rate increases over 16 pulls; avg hit ~79

Probability at Pull Count

10 pulls
5.8%
20 pulls
11.3%
30 pulls
16.5%
50 pulls
26.0%
75 pulls
36.3%
100 pulls
100.0%
Confidence Tiers
ConfidencePulls NeededPrimogems Cost
25%487,680
50%9014,400
63%9014,400
75%9014,400
90% (selected)9014,400
95%9014,400
99%9014,400
Pull Count vs. Probability
PullsCumulative ChancePrimogems Cost
105.84%1,600
2011.34%3,200
3016.52%4,800
5025.99%8,000
7536.32%12,000
100100.00%16,000
Planning notes, formulas, and examples

About the Expected Pulls for Target Calculator

How many pulls do you need to be 90% confident you'll get the item? What about 99%? This calculator works backwards from your desired confidence level to tell you exactly how many pulls to budget.

While the expected number of pulls gives you the average, many players want a higher confidence level before committing resources. This calculator computes pull counts for any confidence percentage, factoring in optional pity mechanics.

Plan your savings and spending with precision. Know whether your stash of 120 pulls gives you an 80% or 95% chance, and decide if you need to save more before a banner drops.

Use the estimate as a planning baseline and adjust it once you have real session data from the game you are playing.

When This Page Helps

Planning around the expected value means you'll succeed only about 63% of the time. For important banner targets, most players want 90%+ confidence. This calculator tells you exactly how much to save to reach your desired confidence level.

How to Use the Inputs

  1. Enter the item's pull rate.
  2. Enter the hard pity pull count (0 for no pity).
  3. Enter your desired confidence level (e.g., 90%).
  4. View the number of pulls needed.
  5. Compare different confidence levels to decide your budget.
Formula used
Pulls needed = ceil(ln(1 − confidence) / ln(1 − rate)) With hard pity: min(calculated pulls, hard pity)

Example Calculation

Result: 230 pulls for 90% confidence

At 1% rate with no pity: ceil(ln(0.10) / ln(0.99)) = 230 pulls for 90% confidence. For 99% confidence, you'd need 459 pulls. With hard pity at 100, 90% confidence requires only about 100 pulls.

Tips & Best Practices

  • 90% confidence is a good planning target for most players.
  • At 99% confidence, you're virtually guaranteed the item but may be over-budgeting.
  • Hard pity caps the maximum pulls needed regardless of confidence level.
  • Free pulls from events reduce the real money needed to hit your target.
  • Consider the value of leftover pulls — excess currency often carries to future banners.
  • If you can't reach 90% confidence, consider waiting and saving more.

Planning with Percentiles

Expected value planning means you'll fail 37% of the time. Percentile-based planning lets you choose your failure rate. At 90%, only 10% of players will miss; at 95%, only 5%. Choose the level that matches the item's importance to you.

The Savings Strategy

For free-to-play or low-spending players, knowing the 90% confidence pull count months in advance lets you plan savings. If you need 160 pulls and earn 50 per month, start saving 3+ months before the expected banner date.

When to Pull and When to Wait

If you don't have enough pulls for at least 50% confidence, strongly consider waiting. Pulling with low odds leads to the worst outcome: spending resources and getting nothing. Patience is the most effective gacha strategy.

Sources & Methodology

Last updated:

Frequently Asked Questions

  • For important banner targets, 90% is the standard recommendation. 80% is acceptable if you're flexible about the result. Never spend at less than 50% confidence for a must-have item — you'll likely be disappointed.