There’s a calculator in Excel 2010 but by default this feature is hidden, to get the calculator on your Excel screen navigate to Quick Access toolbar options, it’s the down arrow symbol next to the undo button on the top left-hand of the screen – and click More Commands.
Adding a calculator hotlink to Excel
It will lead you to Excel Options dialog, under Choose commands, click the drop-down button to select All Commands. Now scroll-down to find the Calculator command and click Add; to show it in Quick Access toolbar. Hit Ok to continue
Click Calculator button in Quick Access toolbar to immediately open Calculator. Now you can use it for simple calculations.
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