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
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
Etsy Shipping Calculator
Model buyer-paid shipping, label cost, packaging, and Etsy fees before changing a shipping profile.
Available
Shipping
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
Amazon FBA Profit Calculator
Estimate FBA referral fees, fulfillment fee tiers, storage costs, product cost, shipping, and net profit.
Available
FBA fees
eBay Fee Calculator
Model final value fees, category fee rates, insertion fees, store subscription impact, and net profit.
Available
eBay fees
TikTok Shop Fee Calculator
Estimate TikTok Shop referral fees, seller transaction costs, shipping subsidies, and net order margin.
Available
TikTok Shop
Stripe Fee Calculator
Calculate credit card processing fees, fixed transaction costs, international card rates, and net payout.
Available
Payment fees
PayPal Fee Calculator
Estimate merchant transaction fees, fixed fees, international surcharge, and net received payout.
Available
Payment fees
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.
eBay Seller Fees Explained
Understand final value fees, fee bases, Store differences, insertion fees, and Promoted Listings.
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.
Etsy vs Shopify Fees
Compare marketplace fees, payment costs, monthly plans, apps, and customer-acquisition costs.
Price for a 30% Margin
Use a clear formula and worked example to set a planning price after costs and fees.
Resources for sellers
Practical checklists, tool-selection guides, and the planned Seller Profit Workbook. Affiliate links are not active yet.
Seller Profit Workbook
Spreadsheet-based planning for pricing, fees, product cost, and ad break-even math.
Free Seller Margin Checklist
A simple checklist for cost, fee, shipping, return, ad, and fixed-cost assumptions.
Seller Tool Guides
Review tool categories for Etsy, Shopify, and shipping operations before adding subscriptions.
2026 Fee Comparison
Compare controlled US fee stacks across Etsy, eBay, Amazon, Shopify, PayPal, and Stripe.
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.