Break-Even Calculator

Enter fixed costs, price and variable cost per unit to see the units and dollars needed to break even, plus months from monthly sales.

All calculations happen locally in your browser. Nothing leaves your device.

Break-even (units)
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Break-even revenue ($)
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Contribution margin
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Profit margin
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Revenue vs. cost
Revenue lineCost line

How It Works

Every product has two kinds of cost. Fixed costs are the money you spend whether you sell anything or not — rent, salaries, equipment, subscriptions. Variable costs are the money spent on each individual unit — materials, packaging, per-unit shipping. The difference between the selling price and the variable cost per unit is the contribution margin: the part of each sale that is left over to pay off the fixed costs.

The core formula
Break-even units = Fixed costs ÷ (Selling price − Variable cost per unit). With $10,000 of fixed costs, a $50 price and a $20 variable cost, each unit contributes $30, so you need 10,000 ÷ 30 ≈ 334 units (rounded up, because a fractional unit still costs you money).
What the chart shows
The red cost line starts at the fixed-cost level and rises by the variable cost for every unit sold. The revenue line starts at zero and rises by the full selling price for every unit. The two lines cross exactly at the break-even point: to the left, cost is above revenue (loss); to the right, revenue is above cost (profit).
Months to break-even
If you tell the tool your expected monthly sales, it divides the break-even units by that number. A result of 2.5 means you cover your costs halfway through the third month of sales at that pace.
Profit margin
Margin = (Price − Variable cost) ÷ Price. It tells you what fraction of each dollar of sales is profit after variable costs. A 60% margin means that even at the break-even point, the business converts most of its revenue into contribution — and everything beyond break-even flows almost entirely to profit.
When the numbers break
If the variable cost is greater than or equal to the selling price, no amount of volume can cover the fixed costs — the contribution is zero or negative and there is no break-even point. This tool flags that case instead of showing a meaningless number.

Frequently Asked Questions

What is the break-even point?

The break-even point is the number of units you must sell so that total revenue exactly equals total cost — profit is zero. Below that number you lose money; above it, every additional unit sold becomes profit. It is the single most common first question when pricing a product or launching a business.

What counts as a fixed cost and what as a variable cost?

Fixed costs are expenses that do not change with the number of units produced — rent, salaries, insurance, equipment, monthly software subscriptions. Variable costs are the costs that scale with every unit — raw materials, packaging, per-unit shipping, commissions. If a cost depends on volume, treat it as variable; if it is the same whether you sell 1 unit or 1,000, it is fixed.

What is the margin of safety?

The margin of safety is how far actual (or projected) sales are above the break-even point, expressed in units or dollars. A large margin of safety means the business can absorb slower sales, a price cut or a cost increase without falling into losses. A small or negative margin means you are operating close to the red line.

Is the break-even point the same as profitability?

No. Break-even is the threshold where you stop losing money; profitability is what happens above that threshold. Two businesses with the same break-even point can be very different: one with a high price per unit reaches it in few units but earns a large profit per unit, while a low-price business needs far more volume for the same result.

Is my data stored or sent anywhere?

No. Every figure is computed by JavaScript in your browser tab and disappears when you close the page. Nothing is stored, transmitted or shared — safe to use for sensitive business numbers.