Calculator for factorials, combinations and permutations. This calculator works off-line.

Enter the number and press calculate. - Maximum value = 170
Factorial ! = Answer =

First Factorial ! = divided by
Second Factorial ! =
Answer =

Permutations and combinations

The number of ways of arranging in a line n objects = n!
The number of ways of arranging in a line n objects,
of which p are alike, q of another type are alike etc = n! / (p! x q! )
Permutations for objects of two types
Number of objects
Number of first type Number of second type Permutations =


Permutations for objects of three types
Number of objects
Number of first type second type third type Permutations =

Number of permutations of p objects taken from n unlike objects = n! / (n - p )!
Number of selected objects
Total number of object pool Permutations =
Number of combinations from above =

Programme written by DJR Hutchon (copyright)

This calculator is for educational use. It is believed accurate but no responsibility for accuracy of the results is accepted by the author. David J R Hutchon BSc, MB, ChB, FRCOG Consultant Gynaecologist, Memorial Hospital, Darlington, England.
Comments and suggestions are welcome and will be included in the comments section. E-mail to me at DJRHutchon@Postmaster.co.uk
1/1/1999