Free Summation Calculator
The free tool below will allow you to calculate the summation of an expression. Just enter the expression to the right of the summation symbol (capital sigma, Σ) and then the appropriate ranges above and below the symbol, like the example provided. Press ANSWER to see the result. You can also subscribe to the full version to get step-by-step solutions (that part of the tool is provided by a third-party premium service, which I highly recommend!)
For further reading about the summation symbol and to refresh how to calculate the sum of a series, you might consider this [lesson](http://faculty.southwest.tn.edu/hprovinc/content/Materials/Lecture Notes/PreCalculus I/Chapter 10/10.1.pdf) on summation.