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Find your real odds of getting a skilling or boss pet over a given amount of XP, kills, or actions — see exactly how your chances stack up over time.
Select whether you're calculating a skilling pet (per-XP roll) or a boss pet (per-kill roll).
Input the pet's known drop rate from the OSRS Wiki.
Tell the calculator how much XP you've gained or how many kills you've done.
View your cumulative probability of having received the pet by now, or by a future checkpoint.
Instant — results calculate live as you enter numbers.
“Was grinding a skilling pet for weeks and this finally explained why the odds felt so much lower than I expected.”
SkillingPetHunt
“Nice to see the cumulative odds broken into checkpoints instead of one flat number.”
BossPetGoals
“Used this across a few different pets to prioritize which grind to focus on first.”
CollectionLogger
Skilling pets roll a chance on every action that grants XP (so the rate is per-XP), while boss pets typically roll once per kill. This calculator supports both mechanics.
The OSRS Wiki lists the current base rate for every skilling and boss pet.
For most skilling pets, the per-action chance scales with the XP gained per action, which the calculator accounts for when you enter total XP gained.
Yes, completely free with no account required.
Pets are some of the rarest cosmetic rewards in OSRS, and their drop mechanics differ between skilling (rolled per action, weighted by XP gained) and bossing (rolled per kill). That difference trips up a lot of players trying to estimate their odds.
This calculator handles both mechanics so you can see a realistic cumulative chance of owning your target pet at your current progress, or plan how much further you'd need to go to reach a given probability.
Configure your exact price and add it to your cart in a couple of clicks.