MMO Drop Rate Calculator
Compute expected drops, probability of at least one drop and the average number of kills required for a single drop given a drop rate and trial count.
How to Use the MMO Drop Rate Calculator
- Enter the per-trial drop rate in percent.
- Enter the number of trials you plan to run.
- Click Calculate.
Anwendungsfälle
- •Planning farming runs.
- •Evaluating loot tables for game design.
- •Sanity-checking drop rate claims.
Formel
E[drops] = n × p. P(at least one) = 1 − (1 − p)^n. Average trials per drop = 1 / p.
Häufig gestellte Fragen
Why "at least one" instead of mean?
Rare MMO drops are binary from the player’s perspective — you either have the item or you do not. The "at least one" probability captures that feeling more usefully than the mean.
Is the drop independent each kill?
This model assumes independent trials. Some games implement pity timers or bad-luck protection which break independence — treat the result as a lower bound then.
What about hard-caps?
If the game caps the number of drops per run, truncate n at the cap before using this calculator.