# Excel Formula for Elapsed Time in Days, Hours and Minutes

Having to calculate date and time difference in Excel is a common task. Unfortunately, depending on your requirements it is also not always a simple one.

Take this example where column A contains a start date and time, and column B an end date and time. We wish to calculate the elapsed time in days, hours and minutes e.g. 11 days 4 hours 9 minutes.

There are multiple ways of calculating date and time difference in Excel. In this scenario we will need to get a little clever.

As you may well know, date and time values are stored as numbers in Excel. For example, the 05/01/2017 10:10 is stored as 42740.42.

Therefore, if I write the formula as =B2-A2, then the result is returned as 2.993056.

To return a result that makes sense to us, we will tackle the date and time parts of the cell separately. Continue reading

# Excel Formula to Find the Least Frequent Value

This tutorial explains an Excel formula to find the least frequent value in a list. This formula will work whether the value is a number, or text. In this example we want to return the name that occurs the least.

The spreadsheet below shows a list of names with the answer in cell D2. Ross is the name that occurs the least in that list.

This formula returns the least frequent value from the list in A2:A16. The formula is explained below so keep reading.

`{=INDEX(A2:A16,MATCH(MIN(COUNTIF(A2:A16,A2:A16)),COUNTIF(A2:A16,A2:A16),0))}`

# Extract the Domain from a List of URL’s

If you are responsible for analysing a list of URL’s in Excel, then you may need to extract the domain from each URL. After extracting the domain you can perform useful reporting tasks such as grouping the domains, or counting the number of unique domains in the list.

This can be quite a difficult task especially if the URL’s are not consistent. In this article we explore a few different approaches to extract the domain from a URL. The method you choose will depend on the appearance of the URL’s in the list and the format you would like to extract the domain in.

1. Extract the domain including the URL protocol.
2. Extract the domain ignoring URL protocol.
3. Extract the domain without the www.
4. Extract root URL’s that don’t end with a slash (/).
5. Using helper columns to break up complex formulae.

# Pick a Name at Random from a List

In this blog post we look at how to pick a name at random from a list. There are many reasons you may need this kind of random selection from a list.

It may be a neat way of deciding who is next to do the washing up, or to make the tea :). Or it is useful for randomly drawing teams for a knockout cup competition.

To perform this random selection, we are going to use two different functions together. They are INDEX and RANDBETWEEN.