Break-even Units Calculator
Find the exact sales volume where fixed and variable costs are fully covered — zero profit, zero loss. Use it as a planning tool before you launch or commit to a cost, not just a diagnostic after the fact.
Fees last verified: 2026-08-02
Your numbers
Results update instantly as you type.
Costs that don't change with volume — rent, salaries, software, etc.
What you charge the customer per unit.
Cost that scales with each unit sold — materials, packaging, fees.
Break-even units
200 units
Break-even revenue
$8,000
Contribution margin / unit
$25.00
How the Break-even Units Calculator works
Enter your fixed costs, the price you charge per unit, and your variable cost per unit. The calculator divides fixed costs by your contribution margin (price minus variable cost) to show exactly how many units — and how much revenue — you need to break even. Getting the fixed-versus-variable split right matters most: fixed costs are what you'd owe at zero sales (rent, salaries, subscriptions); variable costs scale directly with each unit sold (materials, packaging, per-unit fees). Three mistakes are common: misclassifying a cost, which feeds the wrong number into the formula; forgetting to include every real fixed cost, which understates the true break-even volume; and not recalculating after a price or cost change, since the number shown is only accurate for the exact inputs that produced it.
Who this is for
For anyone launching a new product who needs to know whether the sales volume required to cover fixed costs is actually realistic before committing time and money. Freelancers and small business owners use it to check whether a new fixed cost — a tool subscription, a first hire — is justified by expected sales, since a fixed cost only makes sense once you know how much extra volume it forces you to sell. It's also for comparing two pricing options directly: the same product at two prices has two different break-even volumes, often a clearer decision tool than comparing margins alone.
Worked example
Say your fixed costs are $5,000 per month, you sell each unit for $40, and it costs you $15 in variable cost to produce each one. Your contribution margin is $40 − $15 = $25 per unit. Break-even units = $5,000 / $25 = 200 units. At 200 units, you'd generate $8,000 in revenue — enough to exactly cover $5,000 in fixed costs plus $3,000 in variable costs. Whether 200 units a month is a realistic target depends entirely on context this calculator can't see: what's the actual size of the addressable market, how much capacity exists to produce or deliver 200 units, and how does that compare to what similar products actually sell. If 200 units a month is well within reach, this is a solid green light. If it would require capturing an implausibly large share of a small market, or more production capacity than actually exists, the number is telling you the plan needs adjusting — price, fixed costs, or variable costs — before committing to it, not after.
Contribution margin, break-even revenue, and two pitfalls to avoid
Contribution margin is the mechanism the whole formula runs on: Price − Variable cost per unit = what each sale contributes toward paying down fixed costs, after its own direct cost is covered. Fixed costs are a flat bill regardless of volume, so break-even analysis simply asks how many contribution-margin dollars it takes to add up to that bill — Fixed costs ÷ Contribution margin. A thin margin means each sale barely chips away at fixed costs, so a large volume is needed; a wide one means fewer sales clear the bar. This calculator also shows break-even revenue (break-even units × price) — the same point in dollar terms. That's a distinct question from break-even ROAS, which looks at how much return a unit of ad spend needs to generate; this calculator looks at total sales volume against total fixed and variable costs — related, but answering different planning questions. Two pitfalls are worth flagging. Break-even is a floor, not a target — the minimum volume to avoid a loss, not a success goal, and a plan that only aims to hit it leaves zero room for anything going wrong. And this formula says nothing about whether the required volume is actually achievable — it doesn't know production capacity or realistic market size, so a mathematically valid break-even number can still describe a volume nobody could realistically sell or deliver.
Frequently asked questions
What is the break-even point?
The break-even point is the number of units you need to sell for total revenue to exactly equal total costs — the point where you're neither making nor losing money. Every unit sold beyond that contributes to profit.
What's the formula for break-even units?
Break-even units = Fixed costs ÷ (Price per unit − Variable cost per unit). The denominator is the contribution margin — how much each unit contributes toward covering fixed costs after its own variable cost is paid.
How do I tell a fixed cost from a variable cost?
Fixed costs stay the same regardless of volume — rent, a salaried employee, software subscriptions, insurance. Variable costs scale with each unit sold — raw materials, packaging, per-unit shipping, a processing fee charged per transaction. The test is simple: if you sold zero units this month, would you still owe it? If yes, it's fixed. Misclassifying a cost feeds a wrong number straight into the formula and produces a break-even volume that doesn't match reality.
What exactly is contribution margin, and why does the formula use it?
Contribution margin (Price − Variable cost per unit) is what's left from one sale after its own direct cost is covered — what it 'contributes' toward paying down fixed costs. Fixed costs don't care how many units you sell, so the only question is how many contribution-margin dollars it takes to add up to the fixed-cost total; dividing fixed costs by contribution margin answers that directly.
What if my variable cost is higher than my price?
Then contribution margin is negative — every unit sold loses money, and increasing volume only increases the loss, no matter how large. Raise price, lower variable cost, or both before break-even becomes mathematically possible.
How do I lower my break-even point?
Three levers, each with a trade-off. Cut fixed costs directly, though many exist for a reason and cutting them can limit what the business can deliver. Raise price, which lowers the units needed but only works if the market will bear it without losing volume. Or lower variable cost per unit — cheaper materials, a better supplier deal — while watching for quality trade-offs. There's no universally best lever; it depends on what's actually available without damaging the business elsewhere.
The break-even volume looks unrealistic for my situation — now what?
Treat that as useful information, not a reason to ignore it. If the required volume is far beyond what the market or your capacity can support, the plan as priced doesn't work — revisit price, cut fixed costs you can actually live without, or find a cheaper way to produce each unit before launching. Finding this out on a calculator beats finding it out after committing real money.
How is this different from a profit or margin calculator?
A profit or margin calculator tells you profitability at a sales volume you already plugged in. Break-even analysis works the other way: it tells you the specific volume required before any profit exists at all.
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