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Factorials Calculator

Enter factorial statement:


    

How does the Factorials Calculator work?

Free Factorials Calculator - Calculates the following factorial items:
* A factorial of one number such as n!
* A factorial of a numerator divided by a factorial of a denominator such as n!m!/a!b!
* Double Factorials such as n!!
* Stirlings Approximation for n!
This calculator has 1 input.

What 1 formula is used for the Factorials Calculator?

  1. n! = n * (n - 1) * (n - 2) * ... * 2 * 1

For more math formulas, check out our Formula Dossier

What 2 concepts are covered in the Factorials Calculator?

factorial
The product of an integer and all the integers below it
stirlings approximation

Example calculations for the Factorials Calculator

  1. 1!
  2. 1!!
  3. 1 factorial
  4. FACT(1)
  5. 2!
  6. 2!!
  7. 2 factorial
  8. FACT(2)
  9. 3!
  10. 3!!
  11. 3 factorial
  12. FACT(4)
  13. 1!
  14. 4!!
  15. 4 factorial
  16. FACT(4)
  17. 5!
  18. 5!!
  19. 5 factorial
  20. FACT(5)
  21. 6!
  22. 6!!
  23. 6 factorial
  24. FACT(6)
  25. 7!
  26. 7!!
  27. 7 factorial
  28. FACT(7)
  29. 8!
  30. 8!!
  31. 8 factorial
  32. FACT(8)
  33. 9!
  34. 9!!
  35. 9 factorial
  36. FACT(9)



Factorials Calculator Video


Numerator Factorials

Denominator Factorials

Simplify factorial expansions:

Numerator Product = =
Numerator Product = =

Denominator Product = =

Simplify and evaluate:

=
  

=
  
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