Break-Even Calculator - Units and Revenue to Cover Costs

Understanding Break-Even Analysis

The break-even point is where total revenue equals total costs. The formula is simple: break-even units = fixed costs divided by the contribution margin, where contribution margin is price per unit minus variable cost per unit. With 5,000 in monthly fixed costs, a 25 price, and 10 variable cost, each sale contributes 15 toward fixed costs, so you break even at 334 units (5,000 / 15 = 333.3, rounded up because you cannot sell a third of a unit) and 8,333 in revenue.

Contribution margin is the number to watch. Above break-even, every additional unit adds its full margin straight to profit, which is why the table shows that doubling break-even volume yields a profit exactly equal to your fixed costs. The margin ratio (margin as a share of price, 60% in the example) also tells you break-even revenue directly: fixed costs divided by the ratio. A business with a 20% margin ratio must sell three times as much revenue as one with 60% to cover the same overhead.

The custom volume field turns the analysis into a planning tool: enter your realistic monthly sales forecast and see the profit or loss at that level. If your forecast sits below break-even, you have three levers, and the calculator lets you test each in seconds: raise the price, cut the variable cost per unit, or reduce fixed costs. A 10% price increase often moves break-even far more than a 10% volume increase, because it flows entirely into the margin.

The model assumes linear costs: fixed costs stay flat and variable cost per unit is constant at any volume. Reality bends those lines with volume discounts, overtime, capacity steps, and stepped rent, so treat the result as an indication rather than financial advice. For pricing the unit itself, the Discount Calculator shows what promotions do to your margin, and the Invoice Generator handles billing once the sales arrive.