You can sum a series of numbers in Microsoft Excel manually by typing in a simple formula, or automatically with a tool.

SERIESSUM function returns the sum of a power series based on the formula. Learn how to use the SERIESSUM function in Excel.

You can sum cells across multiple sheets in Excel. This article presents steps for Adding single-cell values or Adding values in the range of cells.

Excel’s BYCOL() and BYROW() functions evaluate data across columns and rows, returning an array result set allowing you to bypass a lot of work.

You can't use a SUM() function to sum a filtered list, unless you intend to evaluate hidden and unhidden values. Here's how to sum only the values that meet your filter's criteria.

Learn how to use Microsoft Excel step by step in this beginner-friendly tutorial. If you're new to Excel or want to understand the basics, this video shows you how to get started using Excel right ...