Business
Calculate gross profit, profit margin percentage and markup from cost and selling price, with discounts and extra costs kept visible.
Calculator
Net selling price = selling price × (1 − discount percent ÷ 100). Total cost = cost + extra cost. Gross profit = net selling price − total cost. Profit margin % = gross profit ÷ net selling price × 100. Markup % = gross profit ÷ total cost × 100.
This is the method behind the answer, so the result can be checked rather than simply trusted.Visual grid
Profit Margin is not just a final answer. It is a step on a line: before and after, input and output, assumption and result.
CalculationTime keeps the path visible: the input, the method and the final number belong together.
CalculationTime
Net selling price = selling price × (1 − discount percent ÷ 100). Total cost = cost + extra cost. Gross profit = net selling price − total cost. Profit margin % = gross profit ÷ net selling price × 100. Markup % = gross profit ÷ total cost × 100.
Use this space on the printed report for client, supplier, classroom, job-location, measurement, quote or approval notes.
Net selling price = selling price × (1 − discount percent ÷ 100). Total cost = cost + extra cost. Gross profit = net selling price − total cost. Profit margin % = gross profit ÷ net selling price × 100. Markup % = gross profit ÷ total cost × 100.
Selling price 150 with cost 100 and no discount gives gross profit = 150 − 100 = 50. Profit margin = 50 ÷ 150 × 100 = 33.33%. Markup = 50 ÷ 100 × 100 = 50%.
Master’s Tip: print the price, cost, discount and extra-cost lines before approving a quote. A margin that looks safe before card fees, freight, waste or callbacks can become weak once those real costs are added.
Standard or basis: transparent gross-profit arithmetic. No accounting, tax, securities or industry pricing standard is claimed; confirm local tax treatment, bookkeeping rules and contract terms separately.
Methodology & Accuracy
CalculationTime pages are built around visible arithmetic: the formula, assumptions, worked example and practical limitations are shown so the result can be checked rather than simply trusted.
Net selling price = selling price × (1 − discount percent ÷ 100). Total cost = cost + extra cost. Gross profit = net selling price − total cost. Profit margin % = gross profit ÷ net selling price × 100. Markup % = gross profit ÷ total cost × 100.
Standard or basis: transparent gross-profit arithmetic. No accounting, tax, securities or industry pricing standard is claimed; confirm local tax treatment, bookkeeping rules and contract terms separately.
Where a calculator follows a named legal, trade or industry standard, that standard is cited visibly. Otherwise the page uses transparent general arithmetic and states its limits.Master’s Tip: print the price, cost, discount and extra-cost lines before approving a quote. A margin that looks safe before card fees, freight, waste or callbacks can become weak once those real costs are added.
Subtract total cost from net selling price to get gross profit, then divide gross profit by net selling price and multiply by 100.
Margin divides profit by selling price. Markup divides profit by cost. For example, 50 profit on a 150 sale is a 33.33% margin but a 50% markup on 100 cost.
Yes. If the customer pays a discounted price, use that net selling price as the denominator or the margin will be overstated.
Yes. If total cost is higher than the net selling price, gross profit is negative and the margin shows a loss.
No. It is gross pricing arithmetic. Add tax only after deciding whether your prices and costs are tax-exclusive or tax-inclusive under the rules you follow.
Profit margin is a compact way to show how much of a sale remains after cost. It is useful for quotes, retail pricing, product comparisons and classroom business examples, but only when the selling price and cost basis are stated clearly.
Profit margin asks what share of the selling price remains as gross profit. That is why the denominator is the net selling price, not the cost. Keeping the denominator visible prevents the common margin-versus-markup mistake.
A quoted price is not always the money kept by the seller. Discounts, payment fees, freight, packaging, waste, callbacks and other direct costs can reduce the gross result. The calculator keeps those lines separate so the report can be audited.
For a small business, homeowner quote or classroom worksheet, the useful artifact is not just the percentage. It is the selling price, cost basis, discount, extra-cost assumption, formula, date and notes area kept together before a decision is made.