Learn how to use the SUMIF function in Excel to calculate the sum of values based on a condition. See examples, syntax, and tips for using the function with different criteria and ranges. The SUMIF function in Excel allows you to sum data within a specified range based on a single condition, making it an essential part of Excel formulas for tasks like filtering totals by category, date, or other attributes. Learn how to use SUMIF function in Excel to sum values based on a certain condition. See real-life formula examples with text, numbers, dates, wildcards, blanks and non-blanks. SUMIF is considered one of the important Excel functions to learn. This tutorial explains how to use the SUMIF function in Excel , and it’s intended to be a comprehensive guide with many real-life SUMIF formula examples.