What is the sum of all the odd numbers from 1 to 30?

Sum of all the odd numbers from 1 to 30

To calculate the sum of all the odd numbers from 1 to 30, we simply add up all the odd numbers from 1 up to 30.

When we add up 1 + 3 + 5 ... all the way to 30, we get the following answer:

225

What we find interesting is that when you add up all the odd numbers from 1 to any number, the sum will always be a perfect square.

The sum of odd numbers from 1 to 30 is no exception. To prove that the result is a perfect square, the square root of the result above should be an integer (whole number), which it is:

√225 = 15

To summarize, the sum of all the odd numbers from 1 to 30 is 225 and the sum is a perfect square.

Sum of Odd Numbers Calculator
Here you can calculate the sum of all the odd numbers from 1 to the number you enter below:

Sum of all the odd numbers from 1 to 31
Another sum of odd numbers we have calculated.