Break-Even Point Calculator
Find the sales volume you need to cover costs. Get break-even units, break-even revenue, contribution margin, and a quick profit estimate for an expected number of units.
Tip: run 2-3 scenarios (conservative, baseline, optimistic) by changing price and variable costs.
What a break-even point tells you
A break-even point is the sales level where profit is exactly $0: you’ve covered all costs, but you haven’t earned a profit yet. It’s one of the simplest, most useful “sanity checks” in business planning because it forces you to answer a few questions clearly: what does it cost to operate (fixed costs), what does each sale contribute (contribution margin), and how much volume is realistic.
This calculator focuses on unit-based break-even analysis. That’s ideal when you sell a product, subscription, class, service package, or any offering where “one unit” is a meaningful, repeatable sale.
Fixed costs vs. variable costs (and why the difference matters)
Break-even math only works when costs are separated into fixed and variable categories.
Fixed costs don’t change much with sales volume in the short term: rent, software subscriptions, base payroll, insurance, equipment leases, and accounting fees. Whether you sell 10 units or 1,000, you still pay these.
Variable costs scale with each unit sold: materials, packaging, payment processing fees, shipping, marketplace fees, or hourly fulfillment labor. If you sell one more unit, you usually incur one more unit of variable cost.
Common mistake: treating everything as fixed. If your variable costs are underestimated, break-even will look too low and your plan will feel “easy” right up until cash gets tight.
Contribution margin: the number that powers break-even
Contribution margin per unit is simply: price per unit − variable cost per unit. Each unit you sell “contributes” that amount toward paying fixed costs. After fixed costs are fully covered, the same contribution becomes profit.
The calculator also shows contribution margin as a percentage of price. That percentage is helpful when you’re comparing products or pricing strategies. If you’re exploring pricing changes, you may also want to check the Markup Calculator to translate costs into a price, and the Percent Calculator to sanity-check percentage changes.
How break-even units and break-even revenue are calculated
Once you know the contribution margin, the break-even unit formula is: fixed costs ÷ contribution margin per unit. If the result is 387.1 units, you typically round up to 388 units, because you can’t sell a fraction of a unit.
Break-even revenue is then just break-even units × price per unit. Revenue is useful when you want to compare break-even against a monthly sales target or a pipeline goal.
Using the “expected units” field (profit and margin of safety)
If you enter expected units sold, the calculator estimates profit (or loss) at that volume: (units × contribution margin) − fixed costs. This is a fast way to stress-test a plan. If you’re not confident about expected units, try three versions: what you can sell in a slow month, a normal month, and a great month.
What this calculator does (and doesn’t) include
This tool is a clean unit-based break-even model. It does not include tiered pricing, multiple products with different margins, taxes, financing costs, inventory timing, or capacity constraints. Those are real-world factors, but starting with a simple baseline helps you see the two levers you control most: contribution margin and volume.
When you’re ready, browse more tools at /calculators/ to cross-check pricing, percentage changes, and long-term growth assumptions.
FAQ
What is the break-even point?
The break-even point is the sales level where your profit is $0. You’ve generated enough contribution margin to cover fixed costs, but not more than that.
What’s the difference between break-even units and break-even revenue?
Break-even units tells you how many units you need to sell. Break-even revenue converts that unit count into a dollar amount using your price per unit.
What counts as a fixed cost?
Fixed costs are costs you pay even if you sell nothing in the short term, like rent, base payroll, subscriptions, insurance, and accounting fees.
What counts as a variable cost per unit?
Variable costs scale with each additional unit sold, such as materials, packaging, shipping, payment processing, marketplace fees, or per-unit fulfillment labor.
What if my variable cost is higher than my price?
Then your contribution margin is negative, and you can’t break even by selling more units, you lose money on each sale. You’d need to raise price, reduce variable costs, or change the offer.