Find cube root of a number in Python

In this tutorial, we are going to learn how to find the cube root of a number in Python.

How to find the cube root of a number in Python

Let us understand with an example.
Suppose a number stored in a variable.

a=125

We can find the cube root of 125 using a trick :

a=125
print(a**(1/3))

As we know that the cube root of 125 is 5. So it will return 5.
Note:- This trick will not work in case of negative integers

5.0

If we want to find the cube root of a negative integer. Then we have to make some changes in the above trick.

a=-125
print(-(-a)**(1/3))

-5.0

Function to find cube root using Python:

We can define a function for cube root. When a user inputs a number for cube root, it will automatically return the cube root of the number.

def cube_root(x):
        return x**(1/3)
print(cube_root(27))

As we can see, I have defined a function cube root. And I have called the same function with input 27. So it will return the cube root of 27.

3.0

You may also read:

• How to check if a number is a perfect square in Python
• Music Recommendation System Project using Python

4 responses to “Find cube root of a number in Python”

1. Mr.Mohammad says:

   September 27, 2020 at 3:36 pm

   Hello
   Thanks for your good trick
   But this method does not work correctly on some numbers
   For example: number 185193

   Reply
2. Vishwajith Saravanababu says:

   May 24, 2021 at 8:21 am

   If I try this with 64, then I get 3 and not 4. Any idea why?

   Reply
3. Awharitoma kenneth says:

   June 11, 2021 at 11:01 pm

   Cube Root
   number = float(input( “Enter a number please? “)
   cube_root = number**(1/3)
   print(cube_root)

   Reply
4. Muhammad Hamza says:

   May 24, 2022 at 5:25 pm

   for some digits like 636.it doesn’t give the exact answer instead it give in terms of .99999999

   Reply