Estimate the units and revenue needed to break even — before you source or launch
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<iframe src="https://sellertoolsonline.com/break-even-calculator?embed=1" style="width:100%;max-width:560px;height:800px;border:0;" title="Break-Even Calculator" loading="lazy"></iframe> <p>Free <a href="https://sellertoolsonline.com/break-even-calculator">Break-Even Calculator</a> by SellerTools Online</p>
This Break-Even Calculator is for small business owners, Amazon sellers, ecommerce operators, and students trying to answer practical break-even questions: how many units do I need to sell, what sales revenue covers my costs, and what happens if my fixed costs or variable cost per unit changes? Enter your fixed costs, selling price, variable cost per unit, and optional target profit. The calculator returns break-even units, break-even revenue, contribution margin, and the sales volume needed to reach a profit goal, so you can compare a product idea, launch budget, or pricing plan before spending money.
With $500 fixed costs, a $29.99 sale price, and $24.60 variable cost per unit, contribution margin is $5.39 and break-even is about 93 units.
If you raise price or lower variable cost, the calculator shows how many fewer units you need to sell before the product becomes profitable.
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Break-even analysis is useful when you need more than a single profit number. It connects fixed costs, variable costs, contribution margin, break-even point formula, and sales revenue into one decision: whether the sales volume you need is realistic.
Fixed costs are expenses that do not change with each unit sold. For a new product launch, include product photography, samples, design work, software, upfront PPC testing, marketplace subscriptions, and other launch costs. For a small business, fixed costs may include rent, payroll, insurance, utilities, bookkeeping software, and equipment leases. These costs must be recovered before the product or business reaches the break-even point.
Use the price customers actually pay before subtracting variable costs. If you are comparing pricing strategies, run the calculator at several prices. A higher sale price usually lowers break-even units because each sale contributes more toward fixed costs, but it may also reduce demand. This is why break-even analysis should be paired with realistic sales volume, not used as a price target by itself.
Variable costs increase with every sale. For ecommerce, this may include product cost, packaging, inbound shipping, marketplace fees, payment processing, fulfillment, returns allowance, and per-unit ad spend. For services, include labor or materials directly tied to delivery. The difference between sale price and variable cost per unit is your contribution margin per unit.
The core break-even point formula is: Break-even units = Fixed Costs ÷ Contribution Margin per Unit. Break-even sales revenue = Break-even Units × Sale Price. Example: with $500 fixed costs, a $29.99 price, and $24.60 variable cost, contribution margin is $5.39. The break-even point is about 93 units, or roughly $2,789 in revenue.
Searchers often use break-even units, break-even revenue, and break-even volume to mean related but slightly different outputs. Units answer how many items you need to sell. Revenue answers how much sales value you need. Volume is useful when you are checking whether demand is realistic. If your break-even volume is higher than your likely monthly sales, the product needs a lower cost structure, higher price, or smaller launch budget.
A break-even chart plots total costs and total revenue against units sold. The point where the two lines meet is the break-even point. Below that point, the business is losing money; above it, each additional unit contributes profit after variable costs. Even without drawing a chart, you can use the calculator results to understand the same relationship and test how price, costs, or target profit changes the crossing point.
The break-even point is the number of units (or amount of revenue) at which your total sales cover your total costs — zero profit, zero loss. For Amazon FBA sellers, it's the minimum number of units you need to sell in a given period to recover your upfront investment and ongoing costs.
Fixed costs stay the same regardless of units sold: product photography, initial PPC budget, software subscriptions, storage fees on standing inventory, trademark registration. Variable costs change with each unit: product cost, FBA fulfillment fee, Amazon referral fee, per-unit shipping, per-unit ad spend. Both are needed for accurate break-even analysis.
Contribution margin = Sale Price − Variable Cost per Unit. It's how much each unit 'contributes' toward covering your fixed costs and eventually generating profit. A higher contribution margin means you need fewer units to break even. Increasing your price or reducing variable costs both improve contribution margin.
Break-even units tell you how many items you need to sell. Break-even revenue tells you the total sales dollars needed to cover your costs. For example, if your break-even point is 93 units at a $29.99 sale price, your break-even revenue is about $2,789. Both numbers matter: units help you judge sales volume, while revenue helps you plan cash flow.
A higher sale price or lower variable cost increases contribution margin, which usually lowers the number of units needed to break even. Higher fixed costs have the opposite effect: they raise the sales volume required before you become profitable. Use the calculator to test price changes, cost cuts, and volume shifts before changing your product plan.
This depends entirely on your cost structure, but a practical rule: if your break-even quantity exceeds 50% of your projected monthly sales velocity (from tools like Jungle Scout or Helium 10), the product is risky. You want to break even well within your first month of steady sales to maintain healthy cash flow for restocking.
Learn how landed cost, markup, margin, fees, and shipping affect product pricing in our product pricing guide.
