Plan every token before you spend it.

See your chances for every blook before you spend.

PackPick which pack you want to open. Each pack has different drop rates.

Space Pack(20 tkn)

Target rarityWhich rarity tier do you want to pull? Higher rarity = lower chance.

How many tokens?How many tokens you have to spend on this pack. Use + / - to adjust one at a time, or type directly.

Enter tokens to see your chances

Type a number on the left or drag the slider

Need advanced tools?

How drop rates work

Exact probability first. Simulation only when you ask for it.

Every live update uses the exact binomial formula P(at least 1 success) = 1 - (1 - p)^n. The pack drop rate is the success value, and the number of expected box opens comes from your tokens divided by either the standard box cost or the pack's static effective cost.

Duplicate refund mode never simulates recursive sell-back loops. Instead, each pack ships with a precomputed effective cost constant. That keeps the slider path fast, hydration-safe, and stable under load. Full simulation runs separately in a Web Worker with 5,000 iterations.

FAQ

Common questions about Blooket drop rates

The calculator uses exact binomial probability for every live update. It converts your tokens into expected box opens, then computes the chance of at least one Epic+, Legendary, or Chroma without using Monte Carlo in the real-time path.