Opening
Pull Rate Odds Calculator
Enter a pull rate (1 in N packs) and how many packs you open to see your chance of at least one hit and packs needed for 50% or 90%.
Result
Your result
- Chance of at least one
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- Expected number pulled
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- Packs for a 50% chance
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- Packs for a 90% chance
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Enter the pull rate and the number of packs.
How to use it
- Enter the pull rate as “1 in N packs”.
- Enter how many packs you plan to open.
- Read your chance of at least one hit.
Chance of at least one = 1 − (1 − 1/N)^packs. Packs for a target chance p = ln(1 − p) ÷ ln(1 − 1/N), rounded up.
Real distribution inside boxes may not be fully random. Pull rates you find online are community estimates.
Frequently asked questions
Questions about this tool
What are the odds of pulling a card in 36 packs?
With a 1 in 90 pull rate, the chance of at least one in 36 packs is 1 − (89/90)^36 ≈ 33%.
How many packs to pull a specific card?
For a 50% chance you need about 0.69 × N packs; for 90% about 2.3 × N packs, where N is the pull rate.