All Calculators

Online Discrete Math Calculators

We offer a range of Discrete Mathematics calculators covering factorials, combinations, permutations and more.

Factorial Calculator
$n! = ?$

Calculate the factorial of a number. Supports very large numbers using arbitrary precision arithmetic.

Combinations Calculator
$C(n,r) = {n!}/{r!(n-r)!}$

Calculate the number of ways to choose r items from n items without regard to order.

Permutations Calculator
$P(n,r) = {n!}/{(n-r)!}$

Calculate the number of ways to arrange r items from n items where order matters.

Circular Permutation Calculator
$(n-1)! = ?$

Calculate the number of ways to arrange n items in a circle.

Combination with Replacement Calculator
$C'(n,r) = {(n+r-1)!}/{r!(n-1)!}$

Calculate combinations where repetition is allowed and order does not matter.

Even Permutations Calculator
$n!/2 = ?$

Calculate the number of even permutations (alternating group) of n elements.

Odd Permutations Calculator
$n!/2 = ?$

Calculate the number of odd permutations of n elements.

Permutation with Replacement Calculator
$n^r = ?$

Calculate permutations where repetition is allowed and order matters.

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