Breakeven Calculator: Find Your Break-Even Point

A breakeven calculator estimates how many units you must sell, or how much revenue you must earn, to cover your costs. Enter fixed costs, the selling price per unit, and variable cost per unit to see the break-even sales volume and the revenue needed to reach it.

Formula

Break-even units = fixed costs ÷ (selling price per unit − variable cost per unit). In symbols, Q = F ÷ (P − V), where Q is the break-even quantity in units, F is fixed costs in dollars for the period being analyzed, P is selling price in dollars per unit, and V is variable cost in dollars per unit. The difference P − V is the contribution margin per unit: the amount from each sale available to cover fixed costs after variable costs are paid.

Break-even revenue = Q × P. This is the sales revenue corresponding to the calculated unit quantity. The calculator assumes one product or a consistent average product mix, and that the entered costs and prices apply to the same time period and sales volume.

Worked Example

Using the calculator’s defaults: fixed costs are $10,000, selling price is $50 per unit, and variable cost is $30 per unit.

1. Contribution margin per unit = $50 − $30 = $20.
2. Break-even units = $10,000 ÷ $20 = 500 units.
3. Break-even revenue = 500 × $50 = $25,000.

At these assumptions, selling 500 units generates $25,000 in revenue and $10,000 in contribution margin, equal to fixed costs. The result is a break-even estimate, not a profit target: it excludes any additional sales beyond those needed to cover costs.

What the Break-Even Point Means

The break-even point is the sales level at which total revenue equals total costs, so operating profit is zero under the model. Below that level, the business has not recovered all included costs; above it, each additional unit contributes its margin toward profit, assuming prices and costs remain unchanged.

“Breakeven” is used in several settings. This calculator uses the basic cost-volume-profit meaning for a product or service. It is not a general-purpose investment, trading, loan, or project-return calculator: those analyses may require timing, financing, risk, or other inputs not represented by this formula.

• Fixed costs do not change with the number of units sold within the relevant range and period, such as a monthly lease or a fixed salary.
• Variable costs change with production or sales, such as materials or per-unit packaging.
• Contribution margin is selling price minus variable cost. It is not the same as gross margin in every accounting context; definitions and included costs can differ.

How to Use and Interpret the Calculator

Use figures for one clearly defined period, such as a month or year. Enter fixed costs for that period and per-unit figures for the product or service. The calculator returns a whole-number unit estimate, revenue to two decimal places, and contribution margin per unit to two decimal places.

Since units cannot generally be sold in fractions, the displayed unit result is rounded to a whole number. When the exact calculation is fractional, reaching at least the break-even quantity normally means rounding the required units upward. The revenue display is calculated from the displayed unit result, so for fractional underlying results it may differ slightly from revenue calculated using the unrounded quantity.

For example, if a business sells several products, its break-even point depends on the sales mix. A weighted-average contribution margin can be used only when that mix is reasonably stable. If prices or costs vary significantly by customer, product, or quantity, calculate separate scenarios or use a model that represents those differences rather than treating every unit as identical.

Common Mistakes and Limitations

• Mixing periods: Do not compare monthly fixed costs with annual revenue or per-year amounts. Align all figures to the same period.
• Leaving costs out: Include relevant fixed costs and variable costs. A result is only as complete as the inputs; overhead, shipping, fees, or labor may matter depending on the business.
• Using the wrong variable-cost figure: Enter the cost associated with one unit, not total variable costs for the whole period.
• Ignoring a zero or negative margin: If price equals variable cost, each sale contributes nothing toward fixed costs, so there is no finite break-even quantity. If variable cost exceeds price, each additional sale increases the shortfall. This formula is not meaningful in either case.
• Assuming costs stay fixed forever: Fixed costs may jump when capacity is exceeded, while bulk purchasing or discounts can change per-unit costs. The standard calculation is a simplified estimate within an assumed operating range.

The model also assumes that all units produced are sold, that selling price and unit variable cost are stable, and that there is no material change in inventory or product mix. Taxes, financing costs, and unusual one-time expenses are not automatically included; add them to an appropriate cost model if they are relevant to the question being analyzed.

Frequently Asked Questions

What is the breakeven formula?
Divide fixed costs by the contribution margin per unit: fixed costs ÷ (selling price per unit − variable cost per unit). The answer is the unit sales volume needed to cover those costs.

How do I calculate break-even revenue?
Multiply break-even units by the selling price per unit. This gives the revenue associated with the break-even sales quantity under the entered assumptions.

Can the break-even point be a fraction of a unit?
The underlying formula can produce a fraction, but a business usually sells whole units. Round the required quantity upward when determining the minimum whole units needed to meet or exceed break-even.

What happens if my contribution margin is zero?
Revenue per unit then only covers that unit’s variable cost and contributes nothing toward fixed costs. With positive fixed costs, no finite number of sales reaches break-even under those assumptions.

Does break-even mean the business is profitable?
No. At break-even, modeled revenue equals modeled costs and profit is zero. Sales above break-even may produce profit, but only if the assumptions about costs, price, and sales mix hold.

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in fixed | Fixed costs | $ | 10000 | 0
in price | Selling price per unit | $/unit | 50 | 0
in variable | Variable cost per unit | $/unit | 30 | 0
out units | Break-even units | units | fixed / (price - variable) | 0
out revenue | Break-even revenue | $ | units * price | 2
out contribution | Contribution margin per unit | $/unit | price - variable | 2