OSRS / RuneScape Drop Rate Calculator
Work out drop chances, dry streaks and attempts for any target.
Chance of at least the wanted drops —
Chance of no drop —
Expected drops —
Attempts for target chance —
Your result
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The curve shows the chance of obtaining at least the selected number of drops.
Common targets
Attempts are rounded up: there is no guaranteed drop point.
| Chance | Attempts | Total rolls |
|---|
How the calculation works
Each roll is treated as independent and uses the rate you entered. Multiple wanted drops use a binomial probability. Unique game mechanics, pity systems, tertiary rolls and rate changes must be entered as separate rolls or calculated separately.
This fan-made calculator is not affiliated with Jagex. Verify a drop's current in-game or wiki rate before relying on the result.