What you keep
The money left from one sale after the costs you include. It can be negative if you sell at a loss.
Selling price − total costTHE EVERYDAY BUSINESS TOOLKIT / 01
Know your numbers.
Price with confidence.
A free margin calculator for the things you sell. Find your profit, understand your markup, or work backwards to the right selling price.
READY WHEN YOU ARE
Your numbers, made clear.
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- Profit per sale
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- Profit margin
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- Markup on total cost
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- Total included costs
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Cost and profit breakdown appears here.
Enter your prices and calculate to see the breakdown.
Free to useCalculated in your browserBuilt for small businesses
Use consistent figures. This tool does not calculate VAT, income tax or business overheads automatically. Currency changes the display only; it does not convert amounts. Read the VAT note.
Three numbers. Three different jobs.
Understand margin vs markup →A share of your sale
Your profit as a percentage of revenue. A 30% margin means keeping 30p of each £1 after included costs.
Profit ÷ selling price × 100A return on your cost
Your profit as a percentage of total cost. Without optional costs, this is the usual markup on purchase price.
Profit ÷ total cost × 100A QUICK EXAMPLE
Buy for £10.
Sell for £15.
With no extra costs, you keep £5. That is a 33.33% margin and a 50% markup. The same profit produces different percentages because the starting number changes.
Add £2 of delivery and packaging, and profit falls to £3. Small costs can make a big difference.
| Your numbers | Basic sale | With costs |
|---|---|---|
| Selling price | £15.00 | £15.00 |
| Total cost | £10.00 | £12.00 |
| Profit | £5.00 | £3.00 |
| Margin | 33.33% | 20.00% |
| Markup | 50.00% | 25.00% |
A few useful answers
How do I find a selling price for a 30% margin?
Choose “Find selling price”, enter your cost and set the target to 30. With a £10 cost and no other costs, the price is £10 ÷ 0.70 = £14.2857…, rounded up to £14.29. Adding 30% to £10 gives £13, which is a markup calculation and produces only a 23.08% margin.
Is this gross profit or net profit?
With just cost and selling price, this is a simple gross profit estimate. Including selling costs gives a contribution estimate after those costs. It is not your business’s net profit unless you also account for all relevant expenses and taxes separately.
Can the calculator show a loss or a zero-cost item?
Yes. A selling price below your total costs shows negative profit and margin. If costs are zero, markup shows N/A because dividing by zero is undefined. A zero selling price also makes margin undefined.
What is a good margin?
There is no single percentage that works for every business. Compare your price with demand, competitors, overheads and the money needed to support your business. A positive result here only shows that the costs entered are covered.
Do you save my calculations?
No. Calculator inputs are processed in this browser and are not sent to SphereCraft by the calculator. There is no account or calculation history. Read our privacy and cookie policy for information about hosting and contact emails.