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Price / Quantity Calculator

Calculate revenue, total variable cost, total cost, and operating profit from price and quantity inputs, then review break-even volume and the price needed to reach a target profit at the current sales volume.

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Unit Economics

Price / quantity calculator guide: revenue, contribution margin, break-even volume, and target-profit pricing

A price / quantity calculator ties unit economics and sales volume together. Instead of looking only at revenue, it shows how price, unit cost, fixed overhead, and quantity combine to determine total cost, operating profit, break-even volume, and the price needed to hit a target profit at the current level of demand.

What the calculator is measuring

The calculator starts with the basic revenue relationship of price multiplied by quantity, but it immediately extends that into operating logic. Variable cost is tied directly to quantity sold, while fixed cost stays in place regardless of short-run volume. That structure lets you see whether the contribution from each unit is enough to clear the fixed-cost base.

This matters because revenue alone can be misleading. Two products can generate the same sales dollars while producing very different operating profit once unit cost and fixed overhead are considered. A price / quantity view is therefore one of the quickest ways to test commercial viability before you move to a more detailed budget.

Core formulas behind the result

The calculator uses standard managerial-accounting relationships. Revenue is unit price times quantity, variable cost is unit cost times quantity, and operating profit is revenue less variable cost and fixed cost.

Break-even and target-profit support come from contribution margin, which is the amount left from each unit sale after unit variable cost is covered. That contribution is what remains to absorb fixed costs and then generate profit.

Revenue = Price per unit x Quantity sold

The top-line sales value generated by the chosen price and volume.

Contribution margin per unit = Price per unit - Unit variable cost

The portion of each sale available to cover fixed costs and profit.

Break-even units = Fixed costs / Contribution margin per unit

The units needed to cover fixed overhead before operating profit begins.

Worked example: price, cost, and break-even

Suppose a product sells for 42 per unit, unit cost is 24, and expected volume is 900 units. Revenue is 37,800, variable cost is 21,600, and contribution margin per unit is 18. If fixed costs are 10,800, operating profit is 5,400.

In that setup, break-even occurs at 600 units because the 18 contribution margin covers the 10,800 fixed-cost base after 600 sales. If management wants 6,000 of operating profit instead, the volume target moves above break-even and the calculator shows the exact unit count needed.

How to interpret target-price support

Target-price support asks a different question from break-even: if you hold the current quantity assumption constant, what selling price would be needed to cover variable cost, fixed cost, and the chosen target profit? That is useful when demand is constrained and management is deciding whether to pursue a price increase or a margin mix change.

Use that result carefully. A mathematically achievable price is not automatically a market-achievable price. Competitive response, perceived value, discounts, returns, and channel fees can all limit how much of the target price can realistically be captured.

Further reading

Frequently asked questions

What is the difference between revenue and operating profit?

Revenue is the money collected from sales before costs are considered. Operating profit is what remains after variable cost and fixed cost are deducted. A product can generate high revenue but still produce weak or negative operating profit if unit cost or overhead is too high.

 Why does break-even depend on contribution margin instead of revenue?

Break-even is about how much each unit contributes after variable cost. Revenue by itself does not tell you how much is left to absorb fixed costs. Contribution margin does, which is why it is the correct denominator for break-even units.

 What does the target price result mean?

It is the selling price required to cover unit cost, fixed costs, and the chosen target profit at the current quantity assumption. It is a planning number, not proof that the market will accept that price.

 Can I use this for multi-product businesses?

Only as a simplified average view. Multi-product businesses usually need a product-mix model because different items carry different prices, variable costs, and demand patterns.

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