Excel University Blog

Read on for in-depth articles, tutorials, and videos. Search or browse for specific topics. Be sure to subscribe if you'd like to be notified when we write something new.

COUNTIFS

Count Between Dates

By Jeff Lenning | March 4, 2020 |

Let’s say you measure something with a duration that can span multiple days. For example, a hotel guest can check in for multiple days, a patient can be in a hospital for multiple days, a widget can be in a specific manufacturing stage for multiple days, a book can be checked out for multiple days,…

Read More

Sum a Column Based on Values in Another

By Jeff Lenning | May 22, 2019 |

In this post, we’ll learn how to add up a column of numbers based on the values in another column. For example, we are trying to analyze product sales based on average customer rating. That is, customers rate our products on a scale of 1 to 10, and so each product has an average rating…

Read More

VLOOKUP Hack #10: Maslow’s Hammer

By Jeff Lenning | January 10, 2018 |

Psychologist Abraham Maslow wrote a line that is often referred to as Maslow’s Hammer. It goes something like this: “I suppose it is tempting, if the only tool you have is a hammer, to treat everything as if it were a nail.” I’ve heard the simplified version more often: “If all you have is a…

Read More