Profit Calculator

The profit calculator estimates profit per unit, total profit, revenue, total cost, profit margin, markup, and net selling price after discount. Enter buying cost per unit, selling price per unit, quantity, and discount. The calculator then shows whether the sale earns money or loses money before overhead that is not included in the unit cost.

This tool is useful for product pricing, resale decisions, promotions, small business quotes, marketplace listings, wholesale orders, and quick scenario checks. It is more detailed than the simple phrase “profit equals revenue minus cost” because it shows how discount, quantity, margin, and markup interact. For product-level profitability after cost of goods sold, compare the result with the gross margin calculator. For the sales level needed to cover fixed costs, use the break-even calculator. For company-wide operating profitability, use the operating margin calculator.

What profit means here

Profit is the amount left after subtracting costs from revenue. In this calculator, revenue is net selling price multiplied by quantity. Total cost is unit cost multiplied by quantity. Profit is revenue minus total cost. If your unit cost includes only purchase price or manufacturing cost, the result is closest to gross profit before overhead. If you include packaging, shipping supplies, marketplace fees, payment processing, spoilage, and direct labor in unit cost, the result becomes closer to contribution profit for the sale.

The calculator does not decide which cost definition is correct. It follows your input. That is why two businesses can enter the same selling price and quantity but get different profit results: one may include only product purchase cost, while another includes landed cost, fulfillment, transaction fees, and expected returns.

Formula

The discount is applied first:

$\text{net selling price} = \text{selling price} \times \left(1 - \frac{\text{discount}}{100}\right)$

Profit per unit is:

$\text{profit per unit} = \text{net selling price} - \text{unit cost}$

Revenue and cost are:

$\text{revenue} = \text{net selling price} \times \text{quantity}$

$\text{total cost} = \text{unit cost} \times \text{quantity}$

Total profit is:

$\text{total profit} = \text{revenue} - \text{total cost}$

The calculator also reports:

$\text{profit margin} = \frac{\text{total profit}}{\text{revenue}} \times 100\%$

$\text{markup} = \frac{\text{profit per unit}}{\text{unit cost}} \times 100\%$

If revenue is zero, margin is not meaningful. If unit cost is zero, markup is not meaningful.

Worked example matching the calculator

Use the default inputs:

Because the discount is zero, the net selling price is $33:

$\text{net selling price} = \$33 \times \left(1 - \frac{0}{100}\right) = \$33$

Profit per unit is:

$\text{profit per unit} = \$33 - \$25 = \$8$

Revenue is:

$\text{revenue} = \$33 \times 45 = \$1{,}485$

Total cost is:

$\text{total cost} = \$25 \times 45 = \$1{,}125$

Total profit is:

$\text{total profit} = \$1{,}485 - \$1{,}125 = \$360$

Profit margin is:

$\text{profit margin} = \frac{\$360}{\$1{,}485} \times 100\% = 24.24\%$

Markup is:

$\text{markup} = \frac{\$8}{\$25} \times 100\% = 32\%$

The calculator’s primary result is $360 total profit. It also shows $8 profit per unit, $1,485 revenue, $1,125 total cost, 24.24% profit margin, 32% markup on cost, and $33 net selling price. Its note says selling 45 units earns $360 before overhead not included in unit cost.

Discount scenario

A discount changes the sale quickly. Suppose unit cost is $10, selling price is $15, quantity is 100, and discount is 10%. Net selling price becomes $13.50. Profit per unit is $3.50. Revenue is $1,350, total cost is $1,000, and total profit is $350. Margin is $350 divided by $1,350, or 25.93%. Markup is $3.50 divided by $10, or 35%.

Notice that the 10% discount did not reduce profit by 10%. Before the discount, profit per unit would have been $5. After the discount, it is $3.50. The discount removed 30% of the unit profit. This is why promotion planning should focus on profit dollars, not only sales volume.

Gross profit, net profit, margin, and markup

Gross profit usually means revenue minus cost of goods sold. Net profit usually means the final profit after operating expenses, interest, taxes, and other items. This calculator can approximate gross profit if the unit cost represents cost of goods sold. It does not automatically calculate net profit because it has no fields for rent, payroll, insurance, advertising, depreciation, loan interest, or tax.

Margin and markup use different denominators. Margin asks what share of revenue remains as profit. Markup asks how much profit was added relative to cost. A 50% markup does not equal a 50% margin. Keeping those terms separate prevents pricing mistakes.

Caveats

For real decisions, make unit cost complete enough for the question. A marketplace seller may need to add platform fees, shipping labels, packaging, payment fees, refunds, and damaged goods. A manufacturer may need materials, direct labor, variable overhead, and scrap. A restaurant may need food cost, packaging, delivery commissions, and waste. If those costs are excluded, the calculator can still be arithmetically correct while overstating economic profit.

Also match the period and unit of analysis. Do not compare a per-order shipping fee with a per-unit product cost unless the fee has been allocated across units. If quantity is a forecast rather than a completed sale, review capacity, spoilage, and return assumptions before treating the profit total as locked in.

Sources

• Corporate Finance Institute, Profit — profit definition and formula context.
• AccountingTools, Profit — profit terminology and interpretation.
• Corporate Finance Institute, Operating Margin — margin context for operating profit relative to revenue.