Ecommerce Profit Margin Calculator
Estimate per-order profit after product cost, shipping, packaging, fees, returns, ads, and fixed cost allocation.
Available
Sellers
US-first ecommerce calculators
Know your real ecommerce profit before you price, list, advertise, or reorder.
Free calculators for margins, pricing, fees, and ad break-even math. Results show formulas, editable assumptions, official source links, and last-reviewed dates.
Browser-side math
Calculator inputs stay in the browser by default.
Editable assumptions
Fee and planning defaults are visible and adjustable.
Formula shown
Audit the calculation instead of trusting a black box.
Source ledger
Fee-sensitive assumptions have dated source notes.
No signup gate
Use the calculators before sharing any contact details.
Featured calculators
Start with the flagship profit calculator. The next calculators reuse the same transparent formula and assumption system.
Etsy Fee Calculator
Estimate Etsy listing, transaction, payment processing, optional Offsite Ads, seller costs, and profit.
Available
Platform fees
Shopify Fee Calculator
Estimate Shopify Payments, third-party transaction fees, plan/app allocation, seller costs, and profit.
Available
Store fees
Product Pricing Calculator
Estimate suggested prices from cost, margin, markup, desired profit, shipping, and fees.
Available
Pricing
Break-even ROAS Calculator
Estimate break-even ROAS, target-profit ROAS, max CAC, projected CPA, and ad profit.
Available
Ads
How Seller Math Hub works
A calculator-first workflow for sellers who want useful numbers without hiding the assumptions.
Enter your scenario
Add price, product cost, shipping, packaging, payment fees, returns, ads, and optional fixed costs.
Review the math
Open the formula, cost waterfall, assumptions, and source notes behind the estimate.
Compare and export
Copy the summary or export a CSV when you intentionally choose to save the result.
Seller math guides
Short explanations that show the formulas, pitfalls, and assumptions behind the calculators.
How to Calculate Ecommerce Profit Margin
Learn the order-level formula for revenue, fees, shipping, returns, ads, and fixed-cost allocation.
Etsy Fees Explained
Understand listing fees, transaction fees, payment processing, Offsite Ads, and seller costs.
Shopify Fees Explained
Separate Shopify Payments, third-party transaction fees, plan allocation, apps, and seller costs.
Margin vs Markup
See why margin and markup are not interchangeable and how both affect pricing decisions.
Break-even ROAS Explained
Connect contribution margin, max CAC, target-profit ROAS, CPA, and projected ad profit.
Ecommerce profit is more than price minus product cost
Sellers often miss shipping subsidies, payment fees, fixed transaction fees, packaging, returns, ad cost, and monthly app costs. Seller Math Hub models these as editable assumptions so you can see where margin is being consumed.
The site is independent and calculator-first. Commercial links, affiliate relationships, and sponsored placements must never change calculator formulas or result ranking.