Max Profit Calculator
Maximum profit is the gap between money in and money out, and every business decision is really a bet on that gap. The calculator below attacks it two ways: the Profit equation tab solves for whichever of total revenue, total cost, or profit you do not know, and the Trade profit tab prices a per-unit deal with fees and tells you the break-even quantity. Every number in the worked examples was produced by the tool itself, so what you read is exactly what you will see when you press Calculate.
Enter exactly two values and leave the one you want to calculate blank. A literal 0 counts as blank on this tab.
Total revenue
Total cost
Profit margin
Business status:
Revenue
Total cost
Profit margin
Break-even units
Quick Answer
With $100,000 of revenue and $70,000 of cost, max profit is $30,000 at a 30.00% margin, which the tool rates Highly Profitable. On the Trade profit tab, buying at $20 and selling at $50 for 1,000 units with $100 in fees yields $29,900 profit at a 59.80% margin, breaking even at 4 units. Enter any two of the three profit-equation figures and the calculator solves the third.
Key takeaways
- Profit = Revenue − Cost, and margin = Profit ÷ Revenue × 100. Those two lines are the whole engine.
- The Profit equation tab solves whichever figure you leave blank; on that tab a literal 0 counts as blank.
- The Trade profit tab folds flat fees into total cost, and rounds the break-even quantity up to whole units.
- The name says “max profit”, but strictly it is the profit at the quantity you entered: it assumes everything sells.
How the two tabs work
The two tabs answer two different planning questions. Use the one that matches the decision in front of you, not the one that looks busier.
The Profit equation tab
Enter any two of total revenue, total cost, and max profit; the tool finds the third. Type the numbers you know into their fields, leave the unknown empty, and press Calculate. The result panel shows all three figures, the margin percentage, the worked formula line, and a plain-language read of the business.
The Trade profit tab
Enter cost per unit, selling price per unit, quantity, and any flat fees. The tool returns total revenue, total cost including fees, profit or loss, the margin, and the break-even quantity. Fees are treated as fixed costs on the whole deal, so raising the quantity spreads them thinner: the same $100 fee is 50 cents a unit at 200 units and 10 cents a unit at 1,000.
The profit formulas
Three arrangements of one equation run the first tab, and one per-unit formula runs the second. The definitions are the standard ones the IRS uses when it treats business profit as receipts minus expenses.
Profit equation: Max Profit = Total Revenue − Total Cost. Rearranged: Total Cost = Total Revenue − Max Profit; Total Revenue = Total Cost + Max Profit. Profit margin = Profit ÷ Revenue × 100.
Trade profit: Profit = (Selling price − Cost price) × Quantity − Fees. Break-even units = Fees ÷ (Selling price − Cost price), rounded up to the next whole unit.
If you want to understand the three cost components the SBA says every service price must cover (materials, labor, and overhead), the Small Business Guide to Pricing Products and Services lays them out plainly, and the SBA Ascent worksheets walk through cost-plus versus customer-based pricing models step by step.
Worked examples, checked against the tool
Both examples below were run through the calculator and reproduce exactly. Try them yourself: the inputs are already filled in when the page loads.
Profit equation example
Total revenue $100,000, total cost $70,000, profit blank. Max profit = 100,000 − 70,000 = $30,000.00. Margin = 30,000 ÷ 100,000 × 100 = 30.00%. Status: Highly Profitable, medium-scale business operations.
The $100,000 revenue bar, split exactly as the tool reports it: $70,000 of cost, $30,000 of profit.
Solve the other direction with the same numbers: revenue $100,000, max profit $30,000, cost blank. Total cost = 100,000 − 30,000 = $70,000.00, same margin and status.
Trade profit example
Cost $20/unit, sell $50/unit, 1,000 units, $100 in fees. Revenue = 50 × 1,000 = $50,000.00. Total cost = 20 × 1,000 + 100 = $20,100.00. Profit = $29,900.00, margin = 29,900 ÷ 50,000 × 100 = 59.80%, break-even = ceil(100 ÷ 30) = 4 units.
Profit margin vs markup: which one to quote
Margin and markup describe the same profit from opposite ends. Margin divides profit by the selling price; markup divides profit by cost. On the trade example: (50 − 20) ÷ 50 = 60% margin, while (50 − 20) ÷ 20 = 150% markup. Same $30 per unit, wildly different percentages.
Quote margin when someone asks “what share of each sale do we keep” (investors, lenders, partners). Quote markup when you are costing upward from production (“we mark up 150% over cost”). Never mix them in one sentence: pricing from a 30% markup when you meant a 30% margin quietly gives away profit on every unit. If you price from cost upward often, the markup percent calculator handles the conversion the other way, and the gross profit rate calculator isolates the same ratio from revenue alone.
Reading the business-status verdict
The status line is a plain read of the margin, not a prediction. It answers “is this margin healthy” using fixed tiers, and it updates the verdict badge every time you calculate.
| Margin | Status | What it means |
|---|---|---|
| 30% or more | Highly Profitable | Exceptional. Most industries never get here; software and strong niche services do. |
| 20% to 29.99% | Very Profitable | Strong. Healthy operations with room to reinvest or absorb a price war. |
| 10% to 19.99% | Profitable | Standard. NYU Stern’s sector margin data puts the average US net margin near 10%, so this is solid ground. |
| 0.01% to 9.99% | Marginally Profitable | Thin. One bad quarter of rising costs can erase it; review pricing. |
| Exactly 0% | Break-even | Revenue covers costs exactly. Sustainable only as a stepping stone. |
| Below 0% | Operating at Loss | Costs exceed revenue. Every sale deepens the hole; act on price or cost now. |
The second half of the analysis line describes your scale: startup, small business, medium, or large, based on revenue bands. If you are in the startup band and the margin is negative, check whether the spending is investment or leakage: the burn rate calculator separates deliberate runway spending from plain overspending. For a broader view of the top line that feeds all of this, the revenue calculator projects sales from price and volume before costs are applied.
What competing calculators miss
The ranking trade-profit tools compute (sell − cost) × quantity and stop. No fees, no margin percentage, no break-even quantity, and no way to ask the question most sellers actually have: “how many units cover my fixed costs?” The ranking equation solvers do revenue-minus-cost in one direction only; none solve for the missing figure, none show the margin, and none give a plain verdict on the result.
Three of the common errors are worth naming. First, several popular margin tools divide by zero silently when revenue is zero, or display a markup as if it were a margin, which is exactly the confusion that loses sellers money. Second, per-unit profit tools that ignore fees overstate profit on every marketplace listing that charges one. Third, “max profit” tools that never ask for quantity are computing gross profit on one unit and calling it a maximum; this page is honest about that, calling the result the profit at the quantity you entered.
Frequently asked questions
Max Profit = Total Revenue − Total Cost. Rearranged for the other unknowns: Total Cost = Total Revenue − Max Profit, and Total Revenue = Total Cost + Max Profit. Per unit, the trade tab uses Profit = (Selling price − Cost price) × Quantity − Fees.
Divide profit by revenue and multiply by 100: Margin = Profit ÷ Revenue × 100. A $30,000 profit on $100,000 of revenue is a 30% margin. Margin always uses revenue (the selling total) as the base, which is why it differs from markup.
Yes. The Profit equation tab works in any direction: leave the unknown blank and enter the other two. Entering revenue $100,000 and max profit $30,000 returns total cost $70,000.00; entering cost $70,000 and profit $30,000 returns revenue $100,000.00.
In this calculator they mean the same thing: the largest profit available under the prices and quantities you entered, assuming everything sells. It is not a theoretical ceiling from a demand curve; it is the profit for the specific scenario in the inputs.
Divide your flat fees by the per-unit contribution (selling price minus cost price) and round up. With $100 in fees and a $30 contribution per unit, break-even is ceil(100 ÷ 30) = 4 units. If the selling price is at or below cost, no quantity ever breaks even and the tool says so directly.
Yes. If costs exceed revenue the tool reports a loss instead of a profit and labels the business “Operating at Loss”. A negative margin is the same signal as a percentage: costs are running ahead of income.
On the Profit equation tab the tool treats an entered 0 the same as an empty field, because 0 is the signal for “this is the figure I want solved”. Leave the unknown empty rather than typing 0; typing 0 in a field you intend to solve for also works.
It varies by industry, but the tiers on this page follow common benchmarks: 30%+ is highly profitable, 20%+ very profitable, and 10%+ profitable. NYU Stern’s sector data puts the average US net margin near 10%, so anything above that is beating the middle of the pack. Compare against your own industry’s norms, not a single universal number.
Use margin when you need a target share of the selling price, which is what investors and lenders ask for. Use markup when costing upward from production cost. Do not mix them in the same calculation: a 30% markup on cost equals only a 23% margin on price, so confusing the two quietly erodes profit.
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References
- Internal Revenue Service. About Schedule C (Form 1040), Profit or Loss from Business. Accessed October 23, 2026.
- Internal Revenue Service. Guide to Business Expense Resources. Accessed October 23, 2026.
- U.S. Small Business Administration (Ascent). Introduction to Pricing (worksheet). Accessed October 23, 2026.
- U.S. Small Business Administration (Ascent). Pricing Models for a Successful Business (worksheet). Accessed October 23, 2026.
- NYU Stern School of Business (Damodaran). Margins by Sector. Accessed October 23, 2026.
- OpenStax. Principles of Financial Accounting. Accessed October 23, 2026.
- OpenStax. Principles of Managerial Accounting. Accessed October 23, 2026.
- AccountingCoach. Break-Even Point, Explanation. Accessed October 23, 2026.
- Bureau of Economic Analysis. Corporate Profits. Accessed October 23, 2026.
- Busey Bank (MoneyMatters). Small Business Guide to Pricing Products and Services. Accessed October 23, 2026.