Use this free break-even calculator to find out exactly how many units you need to sell — or how much revenue you need to generate — before your business starts making a profit. Enter your fixed costs, selling price, and variable cost per unit, and the tool instantly shows your break-even point with a visual chart and a pricing sensitivity table.
This calculator works three ways: find your break-even in units, calculate break-even revenue using your contribution margin ratio, or determine how many units you need to sell to reach a specific target profit.
How to Use This Break-Even Calculator
The calculator offers three modes, each built for a different business question.
Break-Even in Units
Break-Even in Units is the most common mode and the one most businesses need. Enter your monthly fixed costs (rent, salaries, insurance — everything you pay regardless of how much you sell), your selling price per unit, and your variable cost per unit (materials, labor per item, shipping per order).
The calculator tells you the exact number of units you must sell to cover all costs, plus it draws a visual break-even chart showing your profit and loss zones and generates a pricing sensitivity table showing how your break-even changes if you raise or lower prices.
Break-Even in Revenue
Break-Even in Revenue is useful when you sell multiple products at different prices or run a service business where “units” do not apply cleanly.
Enter your fixed costs and your contribution margin ratio (the percentage of each revenue dollar that goes toward covering fixed costs).
If you do not know your contribution margin ratio, calculate it first: (Selling Price minus Variable Cost) divided by Selling Price, multiplied by 100.
Target Profit
Target Profit mode answers a forward-looking question: how many units do I need to sell to make a specific dollar amount of profit?
This is the same formula as the standard break-even, but it adds your desired profit to the fixed costs before dividing.
Use this when setting sales targets or planning a new product launch.
A practical tip: Run the calculator with your actual numbers from last month first. Then use the sensitivity table to see what happens if you raise your price by 5% or 10%. Most business owners are surprised at how dramatically a small price increase reduces the number of units needed to break even.
The key takeaway: you cannot plan your sales targets, pricing, or growth strategy without knowing your break-even point. This calculator makes that number impossible to ignore.
The Break-Even Formula Explained
The break-even formula is one of the most important equations in business, and it is simpler than most people think.
Break-Even Point (Units) = Fixed Costs ÷ (Selling Price Per Unit − Variable Cost Per Unit)
The denominator in this formula — selling price minus variable cost — is called the contribution margin per unit. It represents how much each unit sold “contributes” toward paying off your fixed costs. Once enough units have been sold to cover all fixed costs, every additional unit sold generates pure profit.
Here is a worked example. Suppose you run a candle business. Your monthly fixed costs are $3,000 (rent, utilities, insurance, your salary). Each candle sells for $25, and it costs you $10 in materials and labor to make each one. Your contribution margin is $25 minus $10, which equals $15 per candle. Your break-even point is $3,000 divided by $15, which equals 200 candles per month. You need to sell 200 candles every month before you start making profit. Candle number 201 is where profit begins.
Break-Even Revenue = Fixed Costs ÷ Contribution Margin Ratio
The contribution margin ratio is the contribution margin expressed as a percentage of the selling price. In the candle example, $15 divided by $25 equals 0.60, or 60%. So break-even revenue is $3,000 divided by 0.60, which equals $5,000. This confirms the unit calculation: 200 candles multiplied by $25 each equals $5,000.
For a target profit, the formula adjusts slightly: Units for Target Profit = (Fixed Costs + Target Profit) ÷ Contribution Margin Per Unit. If you want to earn $2,000 in profit from your candle business, you need ($3,000 plus $2,000) divided by $15, which equals 334 candles.
An important nuance most guides skip: the break-even formula assumes your selling price and variable costs stay constant as volume increases. In reality, you might get volume discounts on materials at higher quantities (lowering variable cost) or need to hire additional staff once you exceed a certain output (increasing fixed costs as a step function). Use the sensitivity table our calculator provides to model different scenarios.
Fixed Costs vs Variable Costs: Getting the Inputs Right
The accuracy of your break-even calculation depends entirely on correctly classifying your costs. Getting this wrong is the most common mistake businesses make with break-even analysis.
Fixed costs stay the same regardless of how many units you produce or sell. Even if you sell zero products next month, you still pay these costs. Common fixed costs include rent or mortgage payments for your business location, salaries for full-time employees (not hourly production workers), insurance premiums, equipment lease payments, software subscriptions, loan payments, and utilities at their base level.
Variable costs change directly in proportion to the number of units you produce or sell. If you sell one more unit, your variable costs increase by the variable cost per unit. Common variable costs include raw materials and components, direct labor per unit (piece-rate workers, production wages), shipping and packaging per order, payment processing fees (percentage of each transaction), sales commissions (percentage of each sale), and marketplace fees (per-listing or per-sale charges).
The tricky ones are semi-variable costs. Some costs have both a fixed and variable component. Electricity has a base charge (fixed) plus usage-based charges that increase with production (variable). Phone plans have a base monthly fee plus overage charges. For break-even analysis, split these into their fixed and variable parts, or assign them fully to whichever category makes up the larger portion.
A common mistake: treating all labor as fixed. If you have hourly production workers whose hours increase as orders increase, that labor is a variable cost. Only salaried employees whose pay does not change with output should be classified as fixed.
When in doubt, ask this question: “If I sell one more unit, does this cost increase?” If yes, it is variable. If no, it is fixed.
How to Use Break-Even Analysis to Make Better Decisions
Knowing your break-even point is useful, but the real value comes from using it to make specific business decisions. Here are five ways to apply break-even analysis.
Pricing decisions. Run the calculator with your current price, then run it again at 5% higher and 5% lower. The sensitivity table in our calculator does this automatically. You will often discover that a small price increase dramatically reduces your break-even point. If raising your price from $50 to $55 means you need to sell 50 fewer units to break even, that is powerful information for your pricing strategy.
New product launches. Before launching a new product, calculate its break-even point. If you need to sell 5,000 units to break even and your total addressable market is 6,000 customers, that is an extremely risky product. If you need to sell 500 units in a market of 50,000 potential customers, the product has a much wider margin of safety.
Cost cutting decisions. Break-even analysis reveals which costs have the most impact. Reducing your variable cost per unit by $2 has a very different effect than reducing fixed costs by $2,000. The calculator lets you test both scenarios. Generally, reducing variable costs has a larger impact at high volumes, while reducing fixed costs has a larger impact at low volumes.
Hiring decisions. Adding a new employee increases your fixed costs. Use the break-even calculator to determine how many additional units that employee needs to help generate to justify their salary. If a new salesperson costs $5,000 per month and your contribution margin is $25 per unit, they need to generate at least 200 additional sales per month to break even on their salary alone.
Lease vs buy equipment. Buying equipment increases fixed costs (depreciation) but may decrease variable costs (more efficient production). Leasing has different fixed cost implications. Run both scenarios through the calculator to see which option gives you a lower break-even point.
The most underused application: margin of safety. Once you know your break-even point, compare it to your actual sales. If you break even at 200 units and you sell 300, your margin of safety is 100 units, or 33%. That means sales could drop by 33% before you start losing money. A healthy business typically maintains a margin of safety of at least 20% to 25%.
Break-Even Chart: How to Read It
Our calculator generates a visual break-even chart that makes the math intuitive. Understanding how to read this chart gives you a clearer picture of your business economics than numbers alone.
The blue line represents total revenue. It starts at zero (if you sell nothing, you earn nothing) and rises at a constant rate — each unit sold adds the same amount of revenue. The steeper the line, the higher your selling price per unit.
The red line represents total costs. It starts at your fixed costs level (because you pay fixed costs even at zero sales) and rises as you sell more units because variable costs accumulate. The slope of this line is your variable cost per unit.
The dashed gray line represents fixed costs alone. It is horizontal because fixed costs do not change with volume.
The point where the blue and red lines cross is your break-even point. To the left of this intersection is the loss zone — revenue is less than total costs, so you are losing money. To the right is the profit zone — revenue exceeds total costs, and the vertical distance between the two lines is your profit at any given volume.
The wider the gap between the revenue line and the cost line (in the profit zone), the more profit you are making. If these two lines are nearly parallel after the break-even point, it means your contribution margin is thin and you need high volume to generate meaningful profit. If the revenue line pulls away sharply from the cost line, your margins are healthy and profit grows quickly with each additional sale.
A practical insight from the chart: look at where the revenue line starts to pull away from the cost line. That is your “comfortable zone” — the sales volume where your business is not just surviving but genuinely profitable. Your sales target should be well into this zone, not just barely past the break-even point.
Frequently Asked Questions
Q: What is a break-even point?
A: The break-even point is the exact number of units you need to sell (or the exact amount of revenue you need to generate) for your total revenue to equal your total costs. At the break-even point, your business makes zero profit and zero loss. Every unit sold beyond break-even generates profit. Every unit below break-even represents a loss.
Q: What is the break-even formula?
A: Break-Even Point in Units equals Fixed Costs divided by (Selling Price Per Unit minus Variable Cost Per Unit). For break-even in revenue dollars, divide Fixed Costs by the Contribution Margin Ratio. The contribution margin ratio is calculated as (Selling Price minus Variable Cost) divided by Selling Price.
Q: How do I calculate break-even with multiple products?
A: For businesses selling multiple products at different prices, use the revenue-based method with a weighted average contribution margin ratio. Calculate the contribution margin ratio for each product, then weight each by its proportion of total sales. Use this weighted average in the break-even revenue formula. Our calculator’s “Break-Even in Revenue” mode is designed for this scenario.
Q: What is a good break-even point?
A: There is no universal “good” number. What matters is how your break-even compares to your realistic sales capacity. If your break-even is 100 units per month and you can realistically sell 300, that is excellent — you have a 67% margin of safety. If your break-even is 280 units and you sell 300, any small disruption (a slow month, a price increase from a supplier) could push you into a loss.
Q: How can I lower my break-even point?
A: Three ways: reduce fixed costs (renegotiate rent, cut unnecessary subscriptions), reduce variable costs per unit (find cheaper suppliers, improve production efficiency), or increase your selling price. Our calculator’s sensitivity table shows exactly how price changes affect your break-even.
Q: Is break-even analysis still useful for service businesses?
A: Absolutely. For service businesses, replace “units” with “billable hours” or “projects.” Your fixed costs are office rent, software, and salaried staff. Your variable cost per unit is the cost of delivering one hour of service or completing one project (including direct labor, materials, and subcontractor fees). The formula works the same way.