Esperado drops
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The drop rate calculator estimates the expected number of items you might obtain in a game, based on the number of attempts (runs) and the drop probability (p). The formula used is E = runs × p, where E is the average expected drops. For example, if an item has a 5% drop chance and you attempt 100 runs, the result is 5 expected drops. This tool is useful for planning time and resources in games with random rewards.
The calculator assumes each run is independent, meaning the drop chance doesn't change based on previous attempts. This is typical in games with randomized drop systems. You can use the tool to calculate expected yields for raids, mystery boxes, or mobile games. Simply input the drop rate and number of attempts. The result doesn't guarantee outcomes but provides a statistical estimate.
Remember that the result is a theoretical average. In practice, drops may vary significantly due to randomness. If the item's drop depends on events or progression, adjust p accordingly. Also, if the game has daily run limits, factor that into your strategy to manage expectations. While this calculator doesn't replace the fun of playing, it helps strategize your approach more effectively.
Frequently asked questions
What is drop rate?
Drop rate is the probability of an item appearing in a single attempt (run). For example, 2% means the item will appear approximately twice in 100 attempts.
How does the calculator work?
We multiply the number of runs by the drop rate (in decimal). If you attempt 50 runs with 3% drop rate, the expected result is 1.5 items (0.03 × 50).
Can I use it for multiple items?
Yes, but each calculation should be done separately for each item, as drops are independent events.
Does the result guarantee I'll get the items?
No, it's a theoretical average. In games, randomness can lead to results higher or lower than the calculated expectation.