Break-Even Calculator

The break-even calculator estimates how many units you need to sell before a product, service, or campaign covers its costs. Enter fixed costs, the selling price per unit, and the variable cost per unit. The calculator returns break-even units, break-even revenue, contribution margin, and the whole-unit sales target to use in a practical plan.

How to use

1. Enter fixed costs that stay the same over the planning period, such as rent, base payroll, insurance, subscriptions, equipment leases, or launch spending.
2. Enter the price per unit you expect to charge. A unit might be one item, one monthly subscription, one ticket, one consulting hour, or one completed job.
3. Enter the variable cost per unit that increases with every sale, such as materials, packaging, shipping, payment processing, commissions, or direct labor.
4. Review the exact break-even units and the rounded whole-unit target. If you cannot sell a fraction of a unit, use the rounded-up number.

How it works

Break-even analysis separates costs into two groups. Fixed costs are the amount you must recover even if no units are sold. Variable costs are tied to each sale. The difference between price and variable cost is the contribution per unit: the portion of each sale that remains to cover fixed costs and then profit.

For example, if a product sells for $50 and costs $20 to deliver, each sale contributes $30. With $5,000 in fixed costs, the exact break-even point is 166.67 units. Since most businesses cannot sell two-thirds of a unit, the operating target is 167 units. The exact break-even revenue is $8,333.33, while revenue from 167 whole units is $8,350.

This calculator is useful before launching a new offer, setting a minimum sales target, or comparing price changes. It also pairs well with the budget calculator for operating plans, the sales tax calculator when tax affects customer price, and the loan calculator if financing is part of the fixed-cost picture.

Formula

The break-even units formula is:

$\text{break-even units} = \frac{\text{fixed costs}}{\text{price per unit} - \text{variable cost per unit}}$

Break-even revenue multiplies those units by the selling price:

$\text{break-even revenue} = \text{break-even units} \times \text{price per unit}$

Contribution margin is the contribution per unit as a percentage of price:

$\text{contribution margin} = \frac{\text{price per unit} - \text{variable cost per unit}}{\text{price per unit}} \times 100$

Examples

Common mistakes

• Treating every cost as fixed. Costs like packaging, transaction fees, and hourly production labor usually belong in variable cost per unit.
• Forgetting to round up when sales happen in whole units.
• Using the desired profit as fixed cost without labeling it. That can be useful for a target-profit analysis, but it is no longer a pure break-even point.
• Assuming the answer is permanent. Supplier prices, discounts, refunds, and capacity limits can change the contribution per unit quickly.