The SUMPRODUCT function allows you to multiply two arrays of numbers together (e.g. Quantity Sold and Price Per Unit) and add the results each individual calculation together. Without the SUMPRODUCT function, you'll find yourself having to create a third column in which you multiply the Quantity by Price for each row, and then find the sum of all the individual formulas. This lesson shows you how to use SUMPRODUCT to do all that with just one formula.

# Learn Clever Excel Tricks

Anyone can learn the basics of Excel and get the job done, but if you really want to power ahead, try some of these clever Excel tricks. If you use Excel a lot, just one of these lessons could end up taking hours off your week, leaving you with more time to get other stuff done.

The SUMPRODUCT function allows you to multiply two arrays of numbers together (e.g. Quantity Sold and Price Per Unit) and add the results each individual calculation together. Without the SUMPRODUCT function, you'll find yourself having to create a third column in which you multiply the Quantity by Price for each row, and then find the sum of all the individual formulas. This lesson shows you how to use SUMPRODUCT to do all that with just one formula.

Once you get used to using Excel, you can find that using the mouse to select data in your spreadsheet is somewhat slow and time consuming. Here's a quick technique for selecting a range of cells in Excel.

Sometimes you'll find yourself working with dates in an Excel spreadsheet that have been pasted or imported into Excel from another datasource. When that happens, Excel can treat those dates as text - in other words, they look like dates but don't behave like dates. For example you can't sort by date properly. This lesson looks at several ways you can convert a date which Excel is treating as text into a proper date value in Excel.

One of the last keyboard shortcuts I mastered in Excel was moving between worksheets. Fortunately it's easy, and you don't need to wait as long as I did.

Sometimes you'll find yourself working with dates in an Excel spreadsheet that have been pasted or imported into Excel from another datasource. When that happens, Excel can treat those dates as text - in other words, they look like dates but don't behave like dates. For example you can't sort by date properly. This lesson looks at several ways you can convert a date which Excel is treating as text into a proper date value in Excel.

Entering the same formula or value into multiple cells can be time consuming and boring. Most people, if they want to enter the same formula into a row or column of data, will enter the formula in the first cell, then copy and paste it into the rest of the cells where they need the formula. This lesson shows you an even faster way to do it.

If you have a range of cells, of which some contain values and some are blank, and you want to select just the blank cells, there is a quick way to select those blank cells that doesn't involve manually clicking on every one.

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