On Drop Rate
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About On Drop Rate

On Drop Rate helps you check roughly how long you'd need to grind for an item, and whether you're actually dry right now, or just feeling like it.

We're passionate OSRS players, grinding since the game's 2013 release across multiple accounts and every seasonal game mode along the way.

This vibe-coded project is built and maintained by us.

Greetings from Team On Drop Rate.

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← All bosses
Scurrius
Scurrius
Kills per hour modifier
kills/hour

The Scurrius' spine takes about
4 hours and 43 minutes to obtain if you are exactly on droprate.

Expected kills
33
Expected kills on drop rate
Expected time to obtain
4h 43m
at 7 kills/hour (average)

The time to obtain Scurrius' spine at Scurrius, if you are exactly on drop rate, will be 6 hours and 36 minutes with beginner gear, 4 hours and 43 minutes with average gear and 4 hours and 8 minutes in max gear. That is about 33 kills on average.

Customize your estimated kills per hour above to see your own time to be on drop rate.

Additional information

During this grind you will also be making roughly 319,666 gp in total loot — about 67,808 gp per hour at 7 kills per hour. The biggest earner over that stretch is Rune chainbody at about 59,252 gp.

Each kill has a 3.0303% chance at Scurrius' spine. Half of all players get it within 23 kills, 75 kills covers 90%, and 150 kills covers 99% — so going past 33 kills without one is unlucky, but not unusual.

Loot values use live Grand Exchange prices and shift with the market.

Loot from 33 kills

Loading prices…
Item Quantity Price (ea) Total value
Total loot value—

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