Home
Back
OSRS CoX Drop Rate Formula:
| From: | To: |
The OSRS CoX (Chambers of Xeric) drop rate formula calculates the probability of receiving at least one drop after completing multiple raids. It's based on the complementary probability of not receiving the drop in any of the raids.
The calculator uses the probability formula:
Where:
Explanation: The formula calculates the complementary probability of not getting the drop in any of the k raids, then subtracts from 1 to get the probability of getting at least one drop.
Details: Understanding drop probabilities helps players estimate how many raids they need to complete to have a reasonable chance of receiving valuable items, allowing for better resource planning and time management.
Tips: Enter the base drop probability (typically a small decimal value) and the number of raids completed. Both values must be valid (0 ≤ p ≤ 1, k ≥ 1).
Q1: What is a typical base drop probability in CoX?
A: Base drop probabilities vary by item but are typically very small values (e.g., 0.001 to 0.01 for rare items).
Q2: Does this formula account for multiple drops?
A: No, this formula calculates the probability of getting at least one drop, not the probability of getting multiple drops.
Q3: How accurate is this calculation?
A: The formula is mathematically exact for independent events with constant probability, which is how OSRS drop mechanics typically work.
Q4: Can I use this for other OSRS content?
A: Yes, this formula works for any content where drops are independent events with fixed probabilities.
Q5: What if drop rates change during my raids?
A: This formula assumes constant probability. If drop rates change, you would need to calculate separately for each probability period.