Break-Even Calculator: Figure Out Your Units, Revenue, and Margin
Trying to figure out how many units you actually need to sell before you start making money? That’s exactly what this calculator is for. Plug in your fixed costs, your variable cost per unit, and your selling price, and it’ll tell you the break-even point—the spot where your revenue and your costs are finally even. No profit yet, but no loss either.
From there, you can play around with pricing, set a realistic sales target, stress-test a new product idea, or just see how a change in costs shifts the number of sales you need to hit.
So What Exactly Is the Break-Even Point?
Simply put, it’s the sales volume where your revenue exactly covers both your fixed and variable costs—nothing more, nothing less.[1] Sell less than that, and you’re operating at a loss under the numbers you entered. Sell more, and everything past that point starts adding to your profit.
Worth remembering: this is a planning tool, not a promise. It tells you what volume would break even given your assumptions—it doesn’t predict that customers will actually show up and buy that much.
How to Use This Calculator
- Pick your time period. Monthly? Yearly? Just for one project? Whatever you choose, stay consistent—don’t mix a monthly rent figure with an annual salary number.
- Add up your fixed costs. Rent, base salaries, insurance, software subscriptions, equipment leases—anything that stays roughly the same no matter how much you sell.
- Enter your variable cost per unit. Materials, packaging, sales commissions, transaction fees, shipping you cover per order—the stuff that scales with each sale.
- Enter your selling price per unit. Use the price you actually expect to collect after typical discounts, not some optimistic list price.
- Hit Calculate. You’ll get your break-even units, break-even revenue, contribution margin, a chart, and a quick sensitivity check showing what happens if costs or price move by 10%.
The Formula Behind It
Contribution Margin per Unit = Selling Price per Unit − Variable Cost per Unit
Break-Even Units = Fixed Costs ÷ Contribution Margin per Unit
Contribution Margin Ratio = Contribution Margin per Unit ÷ Selling Price per Unit
Break-Even Revenue = Break-Even Units × Selling Price per Unit
At its core, it’s a simple division: how much do your fixed costs total, and how much does each sale contribute toward paying them off?[2] This calculator rounds break-even units up to the nearest whole number, since you can’t really sell 0.7 of a product. If you’re running a service, subscription, or usage-based business where fractional units actually mean something, treat that rounded number as a practical goal rather than an exact accounting line.
A Quick Example
Say a small business is working with these monthly numbers:
- Fixed costs: $50,000
- Selling price per unit: $50
- Variable cost per unit: $20
Contribution margin per unit comes out to $50 − $20 = $30. Divide fixed costs by that, and $50,000 ÷ $30 = 1,666.67—round up, and you land on 1,667 units. At $50 each, that’s $83,350 in break-even revenue. The contribution margin ratio works out to 60%.
| Sales Volume | Revenue | Total Cost | Result |
|---|---|---|---|
| 1,500 units | $75,000 | $80,000 | $5,000 loss |
| 1,667 units | $83,350 | $83,340 | Roughly break-even |
| 2,000 units | $100,000 | $90,000 | $10,000 profit |
Fixed Costs vs. Variable Costs—Why the Split Matters
The formula only works if you’ve sorted your costs correctly, because it treats the two types very differently. Fixed costs stay put regardless of how much you sell, at least within a normal operating range. Variable costs climb as your sales climb. Some costs are a bit of both—if that’s the case for you, try to split out the fixed and variable pieces rather than lumping them together.
Usually Fixed
- Rent and property costs
- Base payroll and salaries
- Insurance
- Software subscriptions
- Equipment leases
Usually Variable
- Direct materials
- Packaging
- Sales commissions
- Payment processing fees
- Per-unit shipping and fulfillment
Break-Even in Dollars
A lot of people searching for this actually want a dollar figure rather than a unit count. If your product mix is fairly stable, you can also estimate break-even revenue by dividing fixed costs by the contribution margin ratio directly.[2] This page shows revenue based on the rounded, whole-unit result, so it’ll come in slightly above the exact theoretical number—that’s intentional, since it makes sure you’re covering costs with whole units instead of a fraction of one.
Making Sense of the Sensitivity Analysis
The sensitivity tab reruns the math after bumping fixed costs, variable cost, and selling price up by 10% one at a time, so you can see which lever actually moves the needle most. Generally, raising your price lowers the number of units you need, assuming demand doesn’t budge, while higher fixed or variable costs push that number up. Just keep in mind that changing your price in real life often changes demand too—so pair this with some actual market research rather than taking it at face value.
Ways to Bring Your Break-Even Point Down
- Trim fixed costs: renegotiate rent, cancel subscriptions you’re not using, and cut overhead that isn’t earning its keep.
- Lower your variable cost: look for better supplier terms, less waste, smarter packaging, and tighter fulfillment.
- Improve your realized price: cut back on discounting, add a premium tier, or get better at communicating value.
- Rework your product mix: lean into whatever has the strongest margins.
- Revisit the numbers often: costs and prices shift, so update the calculation whenever suppliers, wages, rent, or fees change.
Where This Model Falls Short
A basic break-even model assumes your price and variable cost per unit hold steady, that everything you produce gets sold, that costs split cleanly into fixed and variable, and that your product mix doesn’t shift. Real businesses rarely work that neatly—capacity limits, bulk discounts, overtime, returns, taxes, financing costs, seasonality, and unpredictable demand all get in the way. So treat this as a planning estimate, not a forecast or a guarantee.
It’s also worth separating this from a cash-flow break-even. Noncash expenses, loan principal payments, when customers actually pay you, inventory purchases, and capital spending can all make your cash needs look very different from your accounting profit. Use cash-flow planning alongside this calculator if you’re figuring out how much financing or working capital you’ll actually need.
Frequently Asked Questions
How do you calculate the break-even point?
Subtract variable cost per unit from selling price per unit to get the contribution margin. Then divide total fixed costs by that contribution margin. If you sell whole products, round the result up to the next whole unit.
What does break-even mean?
Break-even is the point where total revenue equals total costs. At that point, the business has covered the costs included in the calculation but has not yet produced a profit.
How do I calculate the break-even point in dollars?
Divide fixed costs by the contribution margin ratio for the theoretical break-even sales amount. This calculator displays break-even revenue using the rounded whole-unit result, so the displayed figure may be slightly higher.
What happens if the selling price is equal to or lower than the variable cost?
Each sale contributes nothing—or contributes a loss—toward fixed costs. Under those inputs, there is no achievable break-even quantity. The selling price must rise, the variable cost must fall, or both must change.
Should I use monthly or yearly costs?
Either period works. The important part is consistency: monthly fixed costs should be paired with monthly sales targets, while annual fixed costs should be paired with annual targets.
Does reaching break-even mean the business has positive cash flow?
Not necessarily. Payment timing, loan principal, inventory purchases, capital spending, and noncash accounting expenses can make cash flow different from accounting profit.
How often should I recalculate break-even?
Recalculate whenever selling prices, supplier costs, wages, rent, payment fees, shipping costs, or the product mix changes. It is also useful to review the figures during regular budgeting and pricing decisions.