A break-even calculator tells you exactly how many units you need to sell — or how much revenue you need to generate — before your business stops losing money and starts making a profit. It is an essential tool for entrepreneurs launching products, small business owners setting prices, and financial analysts evaluating new projects. Understanding your break-even point is one of the first steps toward running a financially sustainable operation.
How to Use This Calculator
- Enter your total fixed costs — expenses that stay the same regardless of sales volume (rent, salaries, software).
- Input the selling price per unit.
- Enter the variable cost per unit — expenses that change with each unit produced or sold (materials, packaging, shipping).
- Review the break-even units, break-even revenue, and contribution margin.
What This Calculator Measures
The break-even calculator identifies the exact sales volume where total revenue equals total costs.
- Break-even units — The number of units you must sell to cover all costs.
- Break-even revenue — The total sales amount needed to cover costs, useful when selling multiple products.
- Contribution margin — Price minus variable cost per unit. This is how much each sale contributes toward covering fixed costs.
- Contribution margin ratio — Contribution margin as a percentage of the selling price.
Formula or Logic
The break-even formula is:
Break-Even Units = Fixed Costs / (Price per Unit − Variable Cost per Unit)
The denominator — Price minus Variable Cost — is the contribution margin per unit. Every unit sold above break-even generates profit equal to the contribution margin. A higher contribution margin means you reach break-even faster.
Example Calculations
Example 1: Fixed costs are $8,000 per month. Selling price is $50. Variable cost per unit is $20. Contribution margin: $30. Break-even: 267 units per month.
Example 2: Fixed costs are $20,000. Price is $100, variable cost is $60. Contribution margin: $40. Break-even: 500 units. Selling 600 units generates $4,000 profit.
Understanding Your Results
If your break-even point is lower than your realistic sales forecast, the business is viable. If it is close to or above your expected sales, you need to either reduce fixed costs, raise prices, or lower variable costs. Use the break-even analysis to stress-test your pricing strategy before launch.
Common Mistakes to Avoid
- Lumping semi-variable costs into either fixed or variable without splitting them properly
- Using retail price instead of net revenue after discounts and commissions
- Ignoring the time dimension — monthly fixed costs require a monthly break-even analysis
- Assuming variable costs remain constant at all production volumes