How to Use the Ecommerce Profit Calculator
This quick guide walks you through every field so you can estimate profit and margin accurately before you launch a product or ad campaign.
Who this is for
- Shopify, WooCommerce, Amazon, Etsy, and marketplace sellers validating offer margin.
- Growth teams checking if ad spend still works after shipping and fee pressure.
- Operators deciding price updates before launching promos or bundles.
Use this before scaling spend, changing prices, or evaluating a new supplier quote.
Step-by-step input guide
- Enter Selling Price: Add the final customer price in your selected currency. Example: $49.99. This is the revenue side of your equation.
- Add Product Cost: Enter the landed unit cost or COGS, including manufacturing and inbound costs if needed. Example: $18.00.
- Add Shipping Cost: Include delivery and fulfillment expenses per order so your margin reflects real operational cost. Example: $6.00.
- Set Platform Commission: Choose percentage mode for marketplace fee rates, or fixed amount mode for flat commissions. Example: 3.5% or $2.50.
- Enable Ad Cost (Optional): Tick the checkbox if you run paid traffic. Then input average ad cost per order. Example: $11.00.
- Other Costs: Add packaging, transaction fees, return reserves, or any extra cost not included above. Example: $1.50.
Worked example
If you enter selling price $49.99, product cost $18.00, shipping $6.00, commission 3.5%, ad cost $11.00, and other cost $1.50, this setup helps you quickly validate whether paid growth is realistic.
- Net profit should stay meaningfully positive at your average order value.
- Net profit margin should absorb return-rate and fee volatility.
- Use min revenue ROAS as an order-level guardrail before scaling ad spend.
Read the results correctly
- Net Profit: Remaining amount after all costs.
- Gross Profit & Gross Margin: Gross profit is price minus COGS; gross margin is gross profit divided by selling price.
- Net Profit Margin: Net profit after shipping, fees, optional ads, and other costs, divided by selling price.
- Min revenue ROAS: Order-level guardrail (selling price ÷ contribution before ads). Compare to your ad platform ROAS with attribution in mind — not a substitute for Meta/Google/TikTok reporting.
FAQ
How do I calculate ecommerce profit after fees and ads?
Start with selling price, then subtract product cost, shipping, platform fee, ad cost, and other per-order costs. The result is net profit.
Should I include ad spend in cost?
Yes, if you rely on paid traffic. Include your average attributed ad cost per order so net margin reflects real acquisition economics.
How often should I update assumptions?
Weekly for ad-heavy accounts, and at least monthly for fee and shipping changes. Re-run one base scenario and one conservative scenario.