Break-Even Point Calculator
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Find exactly how many units you must sell to cover your costs, in units and in revenue, from your fixed costs, unit price and variable cost. Everything is calculated in your browser.
What the break-even point tells you
The break-even point is the sales volume at which total revenue exactly equals total costs — the moment a product or business stops losing money and is about to start making it. Below it you operate at a loss; above it every additional sale contributes to profit. It is one of the first numbers any founder, product manager or pricing analyst should know.
Knowing your break-even point turns vague questions like 'is this product viable?' into concrete targets: sell this many units, or reach this much revenue, and you cover your costs. Everything beyond that line is profit.
The formula, step by step
Break-even analysis hinges on separating costs into fixed and variable, then finding the contribution each sale makes toward the fixed pile.
- contribution margin per unit = price per unit − variable cost per unit
- break-even units = total fixed costs ÷ contribution margin per unit
- break-even revenue = break-even units × price per unit
- contribution margin ratio = contribution margin ÷ price × 100
Fixed vs variable costs
Fixed costs stay roughly constant regardless of how much you sell — rent, salaried staff, software subscriptions, insurance. Variable costs scale with each unit sold — materials, packaging, per-unit shipping, payment processing fees, hourly production labour.
Classifying costs correctly is the hardest part of break-even analysis, and the answer changes the result significantly. When a cost is mixed — part fixed, part variable — split it into its two components before entering the figures, so the contribution margin reflects only the truly per-unit costs.
Why contribution margin matters, and the caveats
The contribution margin is the engine of the whole calculation: it is the slice of each sale left over after variable costs to chip away at fixed costs. If it is zero or negative, no volume will ever make you profitable — you would only lose money faster — which is why this tool refuses to compute a break-even in that case.
Keep the model's limits in mind. It assumes a single price and constant costs, but in reality you may offer discounts, face bulk-buying economies, or see prices drift. It also ignores timing and cash flow. Use break-even as a clear planning anchor, then stress-test it with a few different price and cost scenarios before committing.
Frequently asked questions
What is contribution margin?
It is price per unit minus variable cost per unit — the amount each sale contributes toward covering fixed costs and, once those are covered, toward profit. It is the single most important input to break-even.
Why does the tool sometimes say 'no break-even'?
Because your price is at or below your variable cost, so each unit loses money. With a zero or negative contribution margin, no sales volume can ever recover your fixed costs.
Should I round break-even units up?
Yes. Because you cannot sell a fraction of a unit and must fully cover costs, the break-even quantity is rounded up to the next whole unit.
How do I handle a product with several prices?
Break-even assumes one price. For a mix of prices, run the calculation for each price point separately, or use a weighted-average selling price and variable cost.
Does break-even account for taxes or interest?
Not directly. The basic model covers operating fixed and variable costs. Include financing or tax effects by folding them into fixed costs if you need a more complete picture.
How can I lower my break-even point?
Raise price, cut variable cost per unit, or reduce fixed costs. Each widens the contribution margin or shrinks what it must cover, so you break even at a lower volume.
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