Room for ChanceThe science of chance

Free interactive tool

Consecutive Lottery Numbers Calculator

Calculate the chance of an adjacent pair or a run of at least three labels, with exact integer counting.

Inputs and results stay in this page. These tools set no cookies, save no browser preferences and send no input data to our server. A CSV downloads only when you request it. Displayed probabilities are rounded; combination counts use exact integer arithmetic.

Understand the result

How Likely Are Consecutive Lottery Numbers? An Exact Formula explains the derivation and common interpretation errors. Compare it with the published Consecutive numbers: the exact answer meets a million draws.

All six possible adjacent-pair counts in 1,000,000 synthetic 6/49 draws. A run of three contributes two pairs. The figure counts pairs, not maximal runs.
Figure 1. All six possible adjacent-pair counts in 1,000,000 synthetic 6/49 draws. A run of three contributes two pairs. The figure counts pairs, not maximal runs.
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