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Business calculator
Estimate the minimum whole units and sales revenue required to cover fixed and variable costs. This break-even calculator uses selling price, variable cost per unit and fixed costs to calculate contribution per unit, contribution margin, break-even units and break-even revenue. Use figures from one consistent period and currency. The result is a planning estimate rather than a forecast: demand, discounts, returns, taxes, capacity constraints and changes in cost can move the actual break-even point.
Enter your figures
Estimate only. Platform fees, taxes and policies vary by country, account, category and date. Verify important decisions against your current statement or official fee schedule.
Calculator guide
Begin with the period you want to analyze, such as one month, one quarter or one production run. Add fixed costs that belong to that same period, including rent, salaried labor, insurance, subscriptions and other overhead that does not change directly with each unit sold.
Enter the actual selling price after ordinary discounts, but before subtracting the variable costs listed separately. Variable cost per unit should include costs that increase with every sale, such as product cost, transaction fees, packaging, sales commissions and unit-level fulfillment.
The calculator subtracts variable cost per unit from selling price to obtain contribution per unit. It then divides fixed costs by that contribution and rounds up to a whole unit. The rounded unit count is used to calculate break-even revenue, preventing an unrealistically low result based on a fraction of a unit.
Run several scenarios instead of relying on one estimate. Test lower selling prices, higher variable costs and higher fixed costs. This shows how sensitive the break-even point is and can help set sales targets, minimum order quantities or pricing guardrails.
If selling price is zero or contribution per unit is not positive, the displayed break-even units are zero because the entered economics cannot recover fixed costs through additional sales. Correct the price or cost assumptions before relying on the result.
Formula
The method separates costs by behavior and measures how much each unit contributes toward fixed costs.
Worked example
At 500 units, revenue of $25,000 covers $10,000 of fixed costs and $15,000 of variable costs.
Frequently asked questions
The break-even point is the sales volume at which total revenue equals total fixed and variable costs. At that point, accounting profit is zero: the business has covered the costs included in the calculation but has not yet produced a profit.
Break-even units equal fixed costs divided by contribution per unit. Contribution per unit is selling price minus variable cost per unit. This calculator rounds the result up because most businesses cannot sell a fraction of a physical unit.
Include costs that do not change directly with the number of units sold during the chosen period, such as rent, salaried payroll, insurance and software. Keep the period consistent and do not include the same cost again as a variable cost.
Include costs that rise with each additional sale, such as product cost, packaging, unit-level shipping, payment fees and sales commissions. Use an average per-unit amount when a cost varies across orders.
When variable cost equals or exceeds selling price, each additional sale contributes zero or a negative amount toward fixed costs. Selling more units therefore cannot cover fixed costs unless pricing or unit cost changes.
No. Break-even revenue is the sales revenue required to cover the costs entered. Revenue above that level may create profit, but only if prices and costs remain consistent and no omitted expenses reduce the result.
Include taxes only when they are a cost to the business and are not already embedded in another input. Sales taxes collected for a tax authority are usually not revenue, while income tax treatment depends on jurisdiction and entity structure.
Update it whenever prices, supplier costs, fees, rent, payroll or the product mix changes. Businesses with volatile input costs may need to review break-even assumptions monthly or before major pricing and inventory decisions.
Primary sources
Official guidance on break-even units, sales dollars, fixed costs and contribution margin.
Official calculator and explanation of fixed and variable cost inputs.
Government reference describing gross profit rate as profit relative to sales.
Editorially reviewed: 2026-07-21
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