Knowing how to calculate your profit margin will help you take control of your business and ensure that each sale nets the profit you expect. Create a new spreadsheet in Microsoft Excel.

Open Microsoft Excel. Enter the total sales revenue in cell A1. As an alternative, enter an individual product's retail price in cell A1, if you prefer to calculate individual profit margins.

Calculate the average of previous gross margins to use as an estimate for gross margins going forward Following best practices in Excel, you want to break all these numbers out separately, so they ...