Boss / item preset
Custom drop rate
Example rare drop — 1/512
Common rare drop — 1/128
Very rare drop — 1/1,000
Pet / ultra rare — 1/3,000
Extreme rare — 1/10,000
Presets are examples. Use Custom for any OSRS item or boss.
Drop rate (1 / N)
For a 1/512 drop, enter 512.
Your kill count / attempts
Drops received
Enter your total drops from these attempts.
Calculate RNG
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Chance of receiving at least one drop by your KC
0%
Chance still dry
0%
Expected drops
0
KC / drop rate
0×
Estimated rarity of dry
1 in 1
Chance of ≥1 drop
0%
Probability milestones
0
50% chance
0
75% chance
0
90% chance
0
95% chance
0
99% chance
Your RNG
Drop rate
1/512
Your KC
1,000
Your drops
0
Expected drops
1.95
Probability
0 drops
0%
Exactly 1 drop
0%
2+ drops
0%
At least 1 drop
0%
Drop probability curve
The marker shows your current KC. The curve shows the probability of having received at least one drop.
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