How break-even calculator works
The break-even point is the sales volume at which total revenue exactly equals total costs, so profit is zero. Below it you run at a loss; every unit sold above it contributes pure profit. It is the single most useful number for deciding whether a price, a product launch or a service rate is viable.
The engine is the contribution margin per unit: the portion of each sale left after the variable cost of making that unit. It is calculated as price per unit minus variable cost per unit. Divide your fixed costs by that margin and you get the break-even units; multiply by the price and you get the break-even revenue.
Enter your fixed costs (rent, salaries, software - anything that does not change with volume), your price per unit, and your variable cost per unit (materials, payment fees, per-unit shipping). The tool shows the exact break-even units, the whole units you need to sell (rounded up, since you cannot sell a fraction), the break-even revenue, and the contribution-margin ratio as a share of price.
Frequently asked questions
What is the difference between fixed and variable costs?
Fixed costs stay the same regardless of how many units you sell, such as rent, salaries or software subscriptions. Variable costs change with each unit produced or sold, such as raw materials, packaging fees or per-transaction payment fees. The break-even point only exists because each unit contributes its price minus its variable cost toward covering the fixed costs.
Why is the whole break-even units rounded up?
You cannot sell a fraction of a unit, so to truly break even you must sell the next whole unit above the exact figure. If the exact break-even is 333.33 units, you need 334 whole units to cover all costs. The calculator shows both the exact decimal and the rounded-up whole number.
What is the contribution margin ratio?
It is the contribution margin per unit expressed as a percentage of the price. A 40% contribution margin ratio means 40 cents of every sales dollar goes toward covering fixed costs (and, after that, profit). It is useful for comparing products with very different price points on the same scale.
What happens if my variable cost is higher than my price?
Each unit sold loses money, so there is no break-even point - you would need to raise the price or cut the variable cost. The calculator rejects that case because the contribution margin would be zero or negative, meaning no volume of sales can ever cover the fixed costs.
