Here, we will not only tell you what the sum of integers from 1 to 825 is, but also show you how to calculate it fast. The sum of the integers from 1 to 825 is 340,725.
To get the answer above, you could add up all the digits like 1+2+3... +825, but there is a much easier way to do it! Use the following formula:
n(n + 1)/2 = Sum of Integers
In this case, n=825, thus you get your answer by entering 825 in the formula like this:
825(825 + 1)/2 = 340,725
Sum of Integers Calculator
To get the sum of integers from 1 up to another number, please enter that other number here: