Once you have read and understood the example, you can type the numbers that are relevant to your business into the calculator to see your break-even point. Use this formula to calculate your break-even point. Break-even point = fixed costs ÷ gross profit margin. Fixed costs (e.g. $60,000).Gross profit margin (e.g. 90%). ↓. Break-even point. Use this formula to calculate your contribution margin.alculating your break-even point. To be profitable in business, it is important to know what your break-even point is. Your break-even point is the point at which total revenue equals total costs or expenses. At this point there is no profit or loss-in other words, you 'break even'.