How to Use the Mobile Gacha Budget Calculator
Plan your gacha spending before you commit. Enter the item drop rate, cost per pull, and how many copies you need to see the expected number of pulls and costs at multiple confidence levels.
How It Calculates
Expected pulls = target count ÷ drop rate. For a 1% rate and 1 item, the average is 100 pulls. Because results vary greatly by luck, the calculator also shows the 75th, 90th, and 99th percentile outcomes. The 90th percentile means you have a 90% chance of getting the item within that many pulls.
Budgeting Tips
Use the 90th percentile as your realistic budget cap. The 99th percentile is a worst-case reserve. For games with pity systems, compare the pity cost (pity count × pull cost) against the 99th percentile and use the lower value as your maximum budget.
FAQ
No. There is roughly a 63% chance of getting it in 100 pulls. The expected value is the average — bad luck streaks are common.
Multiply the SSR rate by the pickup share. For example, 3% SSR with 50% pickup = 1.5%. Enter 1.5.
No, this tool uses pure probability math. Pity systems, soft pity ramps, and guaranteed mechanics are not reflected — use it as a reference only.