basic

Lottery Odds Calculator

Probability of matching k of n drawn numbers.

Compute the odds of winning a "pick k from n" lottery (e.g. 6/49) — the probability of matching all k drawn numbers, expressed both as a probability and as one-in-X odds.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Combinations C(n, k) = n! / (k! · (n − k)!). P(jackpot) = 1 / C(n, k).

In depth

Compute the odds of winning a "pick k from n" lottery (e.g. 6/49) — the probability of matching all k drawn numbers, expressed both as a probability and as one-in-X odds.