Factorial calculator
The factorial calculator below will help you find the factorial of any number.
Examples of factorial
Example #1:
You rent a 5passenger car so you can go to the grand canyon with 4 friends
How many different ways people can sit? (Suppose that anybody could drive )
You could get the answer by doing this math.
5 × 4 × 3 × 2 × 1
= 20 × 3 × 2 × 1
= 60 × 2 × 1
= 120 × 1
= 120
If you enter 5 in the box, you will see that the answer is 120
Thereofore, there are 120 ways you and your friends can sit.
Example #2:
You are going to plant 7 trees on your back yard
one by one
How many different ways can this task be done?
You could get the answer by doing this math.
7 × 6 × 5 × 4 × 3 × 2 × 1
= 42 × 5 × 4 × 3 × 2 × 1
= 210 × 4 × 3 × 2 × 1
= 840 × 3 × 2 × 1
= 2520 × 2 × 1
= 5040 × 1
= 5040
If you enter 7 in the box, you will see that the answer is 5040
Thereofore, there are 5040 ways to plant 7 trees.
Just enter only one number in the big box and hit the button that says "
Calculate"
As you can see, this calculator will become very useful when the number is big. Not many people want to get the factorial of 25 with paper and pencil
How will you get the factorial of x. The factorial calculator is not built to handle that.
Note that x! = x × (x  1)× (x  2) × (x  3) ..... × 1

Jul 20, 17 10:41 PM
A water tank is emptied at a constant rate. Initially, 36,000 gallons of water were in the tank. A the end of five hours, 16,000 gallons remained. How
Read More
New math lessons
Your email is safe with us. We will only use it to inform you about new math lessons.