Business owners often confuse margin and markup. Each figure helps you set prices and measure productivity. But, a margin vs. markup chart. Three free calculators for different margin calculating purposes: product profit margin calculation, stock trading margin calculation, and currency exchange. Gross margin is the difference between revenue and cost of goods sold, or COGS, divided by revenue, expressed as a percentage. Generally, it is calculated as. The gross girls und panzer margin expresses your profits as a percentage of the total sales revenues generated. Calculate the gross margin percentage, mark up percentage and gross profit of a sale from the cost and revenue, or selling price, of an item. Luckily, it's likely that you know what you need and how to treat this data. Generally, it is calculated as the selling price of an item, less the cost of goods sold production or acquisition costs, not including indirect fixed how do i calculate margin like office expenses, rent, or administrative costs. You can calculate the sales margin for an individual sale, a group of sales or all transactions over a specified period. The cost of retail items includes the price you pay plus any shipping charges.