Ecommerce Profit Calculator
Work out the net profit and margin on an online sale after product cost, shipping, and marketplace or payment fees. Runs in your browser.
The fee percent covers marketplace and payment fees charged on the selling price; other fees are flat charges per order. This is an educational estimate based on the numbers you enter, not financial advice or a carrier quote. Check it against your own figures before you rely on it.
A free ecommerce profit calculator that shows what you actually keep on an online sale. Enter the selling price, the product cost, the shipping cost, a marketplace or payment fee percentage, and any flat fees, and the tool returns the net profit, the net margin, and the total fees. Marketplace and payment fees are charged on the selling price, so they scale with price, while product and shipping costs are fixed per order. Seeing all of it together stops a healthy-looking price from hiding a thin margin. Everything runs in your browser, and nothing you type is stored.
How to use this tool
- 01Enter the price and product costType the selling price and what the item costs you.
- 02Add shipping and feesType the shipping cost, the marketplace or payment fee percentage, and any flat fees per order.
- 03Read the net profitThe net profit, net margin, and total fees update as you type.
When is this useful?
- Price a listingCheck the real margin a price leaves after every fee.
- Compare marketplacesChange the fee percentage to compare selling on different platforms.
- Spot loss-making ordersSee when shipping and fees turn a sale into a loss.
Examples
- A typical orderA 100 price with 40 cost, 8 shipping, a 15% fee, and 2 flat fees leaves 35 profit and a 35% net margin.
- Fees scale with priceRaising the price raises the percentage fee too, so profit grows a little less than the price.
- A lossA low price with high shipping and fees can produce a negative profit, flagging an order to avoid.
Formula or how the tool works
Fees are the percentage fee on the selling price plus any flat fees: fees = price x fee% / 100 + other fees. Net profit = price - product cost - shipping cost - fees, and net margin = net profit / price x 100.
Inputs, outputs, and assumptions
You enter the selling price, product cost, shipping cost, a fee percentage, and flat fees, all in the same currency. The tool returns net profit, net margin, and total fees. It assumes the percentage fee applies to the full selling price.
Supported modes or scenarios
Leave optional fields at 0 to ignore them. Use it per order, and fold any tax you want to account for into the product cost or flat fees.
Limitations and common mistakes
A common mistake is forgetting the percentage fee applies to the price, not the profit. This is a per-order estimate; it does not spread overheads, returns, or advertising across orders. This is an educational estimate based on the numbers you enter, not financial advice or a carrier quote. Check it against your own figures before you rely on it.
Privacy and local processing
The calculation runs in your browser on your device. Your numbers are never uploaded, stored, or shared, and closing the tab clears everything.
Frequently asked questions
What does the fee percentage cover?
Marketplace and payment fees charged as a percentage of the selling price, such as a platform commission plus a card fee.
Is this gross or net profit?
Net of the costs and fees you enter. Include everything per order for a true net figure.
Can the profit be negative?
Yes. When shipping and fees exceed the margin, the order loses money.
Does it handle tax?
Not directly. Fold any tax you want to include into the product cost or the flat fees.
Is my data saved?
No. Everything runs in your browser and nothing you enter is stored.
Related tools
- Profit Margin CalculatorEnter revenue and cost to get profit, profit margin, and markup. Runs in your browser.Open
- Markup CalculatorEnter a cost and a markup percentage to get the selling price, profit, and margin. Runs in your browser.Open
- Break-Even CalculatorFind how many units you must sell to cover fixed and variable costs, and the revenue at that point. Runs in your browser.Open
- Shipping Cost CalculatorEstimate a shipment cost from the chargeable weight and your own rate per kg. No carrier lookup, just your assumptions. Runs in your browser.Open

