Basic Probability & Expected Value
Cumulative Probability of Getting One or More
0.00%
~0 out of 100 players succeed
Expected Value for 1 Item
0 Pulls
Independent Trials Gacha Probability Calculator
A free simulator to accurately calculate item acquisition rates.
We analyze your chances and Expected Value based on the Binomial Distribution formula.
Target Pity Simulation
Based on the current rate (0.6%), check the minimum number of attempts required to reach your target success rate.
Lucky (50% Success Rate)
0 Pulls
Safe Bet (90% Success Rate)
0 Pulls
Near Guarantee (99% Success Rate)
0 Pulls
Acquisition of N or More (Dupe/Breakthrough)
1 Items
Calculates the probability of achieving the target within the current attempts (90 pulls).
Total Acquisition Probability (Cumulative)
0.00%
Chance of getting 1 or more within set attempts
Probability Change Graph by Attempts
Importance of Accurate Probability Calculation
The basic principle of Independent Gacha Trials differs from intuition. Pulling an item with a 1% rate 100 times does not guarantee a 100% chance, but actually results in about a 63.4% chance of acquisition. This calculator provides users with the accurate cumulative probability based on the mathematical Binomial Distribution formula.
Expected Value calculation is essential for resource planning. Knowing the average number of pulls required to obtain one item allows you to set reasonable spending plans for in-game currency (including paid currency).
The FreeImgFix Gacha Calculator processes all calculations locally, making it fast, accurate, and ensuring no personal information is collected.