E-commerce Profit Calculator
Estimate marketplace fees, advertising cost, profit, and margin
E-commerce Profit Calculator — what it does
Model a marketplace sale end to end: selling price, product cost, shipping, platform fee percentage, payment fee percentage, advertising spend and other costs go in; gross revenue, total fees, net profit, margin and the break-even ad spend come out. It shows what actually remains from a sale after every party has taken its cut.
When this tool helps
- Pricing a new product for Amazon, Shopee, eBay or a similar platform before listing it.
- Finding out why a product that sells well still loses money once ads are counted.
- Setting the ceiling for cost-per-order in an advertising campaign — the break-even ad spend figure directly.
How to use it
- Enter the selling price and the product cost.
- Add shipping, platform fee and payment fee percentages.
- Enter advertising cost per unit and any other costs.
- Calculate to see revenue, fees, net profit, margin and break-even ad spend.
Accuracy, limits, and good practice
- Percentage fees apply to the selling price, so raising your price also raises the absolute fees — margin grows slower than price.
- Returns are a real cost this model omits; a 5 percent return rate can erase a thin margin entirely.
- Break-even ad spend is per unit sold. Spending more than that per order means every sale loses money regardless of volume.
Frequently asked questions
What is a healthy net margin in e-commerce?
After all fees and advertising, many resale businesses land between 10 and 20 percent; below 5 percent leaves no room for returns and errors.
Should I include my own time?
For a fair picture, yes — add a per-unit labour estimate to other costs, especially while volumes are small.
Why is my margin negative at a price that looked fine?
Stacked percentage fees plus fixed shipping often total 25 to 40 percent of the price. The itemised fee line shows exactly where it went.
Related tools on this site
- Loan Payment Calculator — Estimate monthly payments, total payment, and interest
- World Time Zone Converter — Convert a date and time from one time zone into multiple destination zones
- Bill Split & Tip Calculator — Calculate tips, totals, and each person’s share
Everything above runs inside this page. E-commerce Profit Calculator needs no account, no upload, and no server round trip — close the tab and nothing is left behind.
電商利潤計算器能做什麼
把平台銷售從頭到尾算一遍：輸入售價、產品成本、運費、平台費率、金流費率、廣告費與其他成本，得到總營收、總費用、淨利、利潤率與損益兩平廣告費。它讓你看清各方抽完之後，一筆訂單真正剩下多少。
什麼時候用得上
- 在 Amazon、蝦皮、eBay 等平台上架新品前先訂價。
- 查明為什麼賣得不錯的商品，算進廣告後仍在虧錢。
- 為廣告活動設定每筆訂單成本上限——損益兩平廣告費就是那個數字。
使用步驟
- 輸入售價與產品成本。
- 填入運費、平台費率與金流費率。
- 輸入每件的廣告費與其他成本。
- 計算後查看營收、費用、淨利、利潤率與兩平廣告費。
精確度、限制與實務建議
- 百分比費用以售價計算，因此漲價也會推高費用絕對值——利潤增長慢於價格增長。
- 退貨是本模型未含的實際成本；5% 的退貨率就足以吃光偏薄的利潤。
- 兩平廣告費是「每售出一件」的上限，單筆訂單廣告花超過它，賣越多虧越多。
常見問題
電商的健康淨利率是多少？
扣完所有費用與廣告後，許多轉售生意落在 10% 至 20%；低於 5% 就沒有空間吸收退貨與失誤。
要把自己的時間算進去嗎？
要看清真實狀況就該算——把每件的人力估值加進其他成本，量小時尤其重要。
價格看起來沒問題，利潤率怎麼是負的？
層層百分比費用加上固定運費，常合計佔售價 25% 至 40%。費用明細行會告訴你錢去了哪裡。
本站相關工具
以上步驟全部在這個頁面內完成，電商利潤計算器 不需要註冊、不上傳檔案、也不經過伺服器，關閉分頁後不會留下任何資料。