Profit Loss Calculator
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How to Use the Profit Loss Calculator
Enter the cost price per unit
Type or drag the amount it costs you to acquire or produce a single item. This is your starting point for all profit math.
Input the selling price per unit and quantity
Enter the price customers pay and how many units you sell. The calculator multiplies these to find your total revenue.
Try a discount to see how it eats profit
Optional but powerful. Set a percentage off your selling price and the calculator instantly shows the shrunken profit, the discount at which you break even, and the discount at which you start losing money. Most profit-loss tools skip this entirely.
Switch between profit on cost and gross margin
Use the toggle to make the headline percentage follow either the standard profit on cost or the accounting gross margin on selling price. Both numbers are always shown below.
Read your summary, donut, and insights
See your total revenue, total cost, net profit or loss, and percentage. The donut splits your revenue into cost and profit, and the insights show your profit per unit, gross margin, and the maximum discount you can offer before losing money.
Profit Loss Calculator - Discount, Margin, and Break-Even in One Tool
Whether you are a retailer checking a product line, a freelancer pricing a project, a trader evaluating a deal, or a student learning commerce, this Profit Loss Calculator gives you the complete picture in one click. Enter the cost price, selling price, and quantity, and you instantly see your total cost, total revenue, net profit or loss, and the profit or loss percentage. No manual formula, no spreadsheet, no guesswork.
What sets this calculator apart is that it answers the follow-up questions a real business actually asks. A product costing Rs 380 sold at Rs 500 is profitable - but what is the percentage? What happens if you offer a 10 percent discount during a sale? How much margin do you really have to negotiate with? This tool turns a single profit figure into a working pricing decision by modelling discounts, showing both profit on cost and gross margin, and telling you the exact discount at which the deal stops making money.
The New Features - What You Get Here That Other Profit Loss Calculators Don't
Most profit-loss calculators accept a cost price, a selling price, and a quantity, then return one percentage and stop. This calculator layers on four features that turn that single number into a complete pricing and discounting tool:
1. Live Discount Modelling. Add a discount percentage and the calculator applies it to your selling price in real time. You instantly see how much of your profit a sale or promotion eats, the new net profit, and your profit per unit at the discounted price. Most tools calculate discounts in a separate screen, if at all.
2. Profit on Cost and Gross Margin Shown Together. The single most confusing point in profit math is that profit on cost and gross margin on selling price are different ways of reading the same transaction. This calculator shows both at once and lets you toggle which one drives the headline percentage, so you can match whatever convention your buyer or accountant is using.
3. Break-Even and Maximum Safe Discount Insights. Alongside the headline profit, you get your break-even selling price per unit and the maximum discount you can offer before the deal starts losing money. This is the floor price every small business needs before negotiating, and almost no free calculator provides it.
4. Value-Split Donut and Profit Insights. Instead of a single answer, you get a donut that splits your revenue into the portion that covers your cost and the portion that is your profit, plus a "Profit and Loss at a Glance" card showing your cost per unit, effective selling price, profit per unit, and both percentages for the discounted deal.
The Core Formulas - Profit, Loss, and Percentage
When Selling Price is higher than Cost Price (Profit):
- Profit Amount = (Selling Price - Cost Price) x Quantity
- Profit Percentage on Cost = (Profit Amount / Total Cost) x 100
- Gross Margin Percentage = (Profit Amount / Total Revenue) x 100
When Selling Price is lower than Cost Price (Loss):
- Loss Amount = (Cost Price - Selling Price) x Quantity
- Loss Percentage = (Loss Amount / Total Cost) x 100
Example - Profit: Cost Rs 250 per unit, selling price Rs 340, quantity 50 units. Total cost = Rs 12,500. Total revenue = Rs 17,000. Profit = Rs 4,500. Profit on cost = (4,500 / 12,500) x 100 = 36 percent. Gross margin = (4,500 / 17,000) x 100 = 26.5 percent.
Example - Loss: Cost Rs 180, selling price Rs 155, quantity 100 units. Total cost = Rs 18,000. Total revenue = Rs 15,500. Loss = Rs 2,500. Loss percentage = (2,500 / 18,000) x 100 = 13.9 percent.
By convention, profit and loss percentage is calculated on the cost price in commerce and academic contexts, while gross margin is calculated on the selling price in accounting and retail. Both measure profitability differently. A 25 percent profit on cost equals a 20 percent gross margin - the same transaction, two lenses.
Profit Percent on Cost vs Gross Margin Percent - The Difference That Matters
These two numbers are confused constantly, and the mix-up costs real money at the negotiating table:
- Profit Percent (on cost): Used in trading and commerce. Formula: Profit / Cost Price x 100. If cost = Rs 100 and selling price = Rs 125, then profit = Rs 25 and profit on cost = 25 percent.
- Gross Margin Percent (on selling price): Used in retail, finance, and accounting. Formula: Profit / Selling Price x 100. Same transaction: 25 / 125 x 100 = 20 percent gross margin.
A buyer who says "we need 30 percent margin" usually means 30 percent of the selling price, not 30 percent on cost. To achieve that you must price at Cost / 0.70, which is a 42.86 percent markup on cost. Misreading these two is one of the most common pricing mistakes small businesses make when entering B2B sales. This calculator shows both numbers side by side and lets you switch which one headlines the result.
How Discounts Erode Profit - The Discount Feature Explained
A discount reduces your revenue while your cost stays fixed, so it hits profit far harder than the percentage suggests. Consider a product with cost Rs 400 and selling price Rs 600: profit of Rs 200 per unit, 50 percent on cost, 33.3 percent gross margin. Offer a 10 percent discount (sell at Rs 540):
- New profit = 540 - 400 = Rs 140 per unit
- New profit on cost = (140 / 400) x 100 = 35 percent, down from 50 percent
- A 10 percent price cut removed 30 percent of your profit in absolute terms
A 25 percent discount - common during festive sales - collapses the profit from Rs 200 to Rs 50 per unit, a 75 percent drop. Set the discount in this calculator and you will see the danger immediately in the shrunken net profit and profit per unit. It also tells you the maximum discount you can offer before profit hits zero, so you never price below your floor.
Break-Even Price and Maximum Safe Discount - Finding Your Floor
Break-even is the point where total revenue equals total cost - no profit, no loss. Ignoring fixed overheads, your break-even selling price is simply your cost price per unit: you must sell above your cost to make money. In practice the true break-even must also absorb rent, salaries, utilities, shipping, and packaging allocated per unit. If those overheads add Rs 30 to a product that costs Rs 200 to buy, your real break-even is Rs 230, not Rs 200.
Maximum safe discount is the discount at which the deal stops making money. It is the discount that brings your selling price down to your cost price. This calculator shows it directly in the insights, along with your per-unit profit. Set a discount no higher than this figure and you never lose money on the transaction. Many small businesses fail not by selling each unit at a loss, but by discounting so deeply and so often that volume no longer covers their costs - know your floor and stick to it.
Understanding the Value-Split Donut and Profit Insights
The value-split donut divides your total revenue into the portion that covers your cost and the portion that is your net profit. When you are making a loss, the donut shows your cost with the net loss marked in red, and the center shows your total revenue. The "Profit and Loss at a Glance" card right below the donut stacks your cost price per unit, effective selling price, quantity, discount applied, profit per unit, total cost, total revenue, net profit or loss, profit on cost, and gross margin - so you can quickly read both the per-unit small trade and the transaction-level big picture together.