Poker Pair Probability
Calculator

Inputs

Exactly one pair probability (%)
42.256902

Results

Exactly one pair probability (%)
42.256902
Total possible hands
2,598,960
Favorable hands
1,098,240

Gaming results

Exactly one pair probability (%)42.256902
Total possible hands2,598,960
Favorable hands1,098,240

formula-map diagram

Exactly one pair probability (%)
42.256902
Total possible hands
2,598,960
Favorable hands
1,098,240

Game math relationship

Formula

P(one pair) = [C(13,1)·C(4,2)·C(12,3)·4³] ÷ C(52,5)

= 42.256902761104

Note

This is a simplified model: it applies the standard probability or game-math formula to the numbers you entered. Real games add pity systems, drop-rate tiers, rounding, server-side variance and balance patches, so treat the result as an estimate rather than a guarantee.

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