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6-sided dice probability calculator

Count dice that meet a face rule, such as exactly two sixes or at least three results of five or more. These events depend on faces rather than their sum.

Calculator

Event probability
27.7777777778%
Complement probability
72.2222222222%
Probability that one die qualifies
16.666667%
Expected qualifying dice
0.333333
Qualifying-dice distribution
Qualifying diceProbability (fraction)
0.0000000000000.694444444444
1.0000000000000.277777777778
2.0000000000000.027777777778

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How this calculator works

Mark the accepted faces on one fair d6. If m faces qualify, each independent die succeeds with probability m/6, so the number of qualifying dice is binomial. The table lists every possible count. Repeated entries in a face list are counted once. The all-same event instead has six disjoint outcomes, one for each common face; it does not require choosing that face in advance.

Formula

p = m/6; P(K = k) = C(n,k) p^k (1-p)^(n-k). Sum the appropriate terms for at least or at most. P(all faces equal) = 6/6^n.

Worked example

Two dice show exactly one six in 10 of their 36 ordered outcomes, giving 5/18 or about 27.78%. Three dice all showing the same face have probability 6/216 = 1/36.

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Frequently asked questions

Is exactly one six the same as a sum of six?

No. A face count checks each die separately. For sums, use the related dice probability calculator.

Does at least include the requested count?

Yes. At least two includes two, three and every larger possible qualifying count. At most includes equality too.

Can I use loaded dice?

This page assumes independent fair d6 dice. Unequal face probabilities require a different model.

Sources

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