About SellerMaths

1. What SellerMaths is

SellerMaths is a seller-focused calculation project. The site turns public fee policies, payout rules, and pricing logic into calculators, comparison pages, guides, and templates that are easier to use during real pricing decisions.

• The goal is practical unit economics, not generic business motivation copy.
• Most pages are designed around a seller question: What price do I need, what payout will I keep, or which platform leaves me more after fees?
• The project is meant for decision support before you change prices, shipping strategy, margins, or platform mix.

2. Who the site is for

SellerMaths is for small online sellers, marketplace sellers, creators, and side-business operators who need quick but transparent math. It is especially useful for people pricing products without a finance team or checking whether a platform fee stack still leaves enough margin.

• Handmade and marketplace sellers who need fee-aware pricing.
• Digital product and creator businesses comparing payout models.
• General sellers who need break-even, margin, markup, or selling-price calculations without building every formula from scratch.

3. How the calculators are built

The project uses public platform fee documentation as the base layer, then combines those rules with seller-entered inputs such as price, shipping, ad participation, order mix, or plan choice. The intent is to keep assumptions visible instead of burying them.

• Public fee pages are used for platform-level rules such as transaction fees, payout fees, payment processing, or subscription layers.
• IRS and SBA materials are used for the business-logic layer around gross receipts, recordkeeping, break-even, and pricing discipline.
• Pages are scoped carefully so a comparison only claims what the source set can support.

4. What you should expect on a typical page

A normal SellerMaths page is not just a single output box. The useful part is the surrounding logic: assumptions, fee breakdowns, worked examples, and links to the next calculator or guide that usually follows from the first answer.

• Calculator pages focus on one job and show the fee or profit logic behind the result.
• Compare pages place two platforms or fee models on the same input scenario so the verdict is readable.
• Guide and template pages explain how to carry the math into real pricing, recordkeeping, and spreadsheet work.

5. What SellerMaths does not do

SellerMaths is not connected to your store account, payment processor, or bookkeeping file. It does not see your private statements, and it does not replace legal, tax, or accounting advice for your business.

• The site does not import private sales data automatically.
• The calculators are estimates based on public rules and your inputs, not official platform invoices or filed tax documents.
• Platform policies can change by country, date, category, plan, payment method, or seller status, so official docs still matter.

6. Why transparency matters here

Seller pricing breaks when one hidden layer gets missed. A tool that hides the fee stack is fast, but it can still push you into underpricing. SellerMaths tries to do the opposite by exposing the assumptions and pointing to the source set used for the page.

• You should be able to tell why the result moved, not just see that it changed.
• Visible assumptions make it easier to spot whether shipping, ads, tax treatment, payment fees, or overhead were left out.
• Transparent pages are easier to challenge, update, and trust.

7. How to use the project well

Start with the narrow calculator that matches the immediate decision, then move into the guide or template that helps you apply the result. That workflow usually gets you from one-off math into a repeatable pricing system.

• Use a fee calculator first when you need a payout estimate on one order.
• Use a reverse-price or break-even page when you need to solve for the selling price itself.
• Use a template or guide when you want the calculation logic to survive beyond a single transaction.

Assumptions

• SellerMaths pages rely on public documentation and seller-entered inputs, not private account integrations.
• A page can only be as accurate as its current scope, assumptions, and the seller inputs entered into it.
• Platform fees, payout rules, taxes, and thresholds can change over time or differ by country, category, and plan.
• SellerMaths is an educational calculation project and not legal, tax, accounting, or financial advice for a specific business.

FAQ

Related pages

• All Calculators
• SellerMaths Methodology
• How to Price a Product
• Etsy Reverse Price Calculator
• Gumroad Payout Calculator
• How to Price a Product
• How to Calculate Net Profit
• Stripe vs PayPal Fees
• Free Profit Margin Template
• SellerMaths Sources
• SellerMaths Terms of Use
• SellerMaths Disclaimer
• SellerMaths Guides
• SellerMaths Compare Pages

Related tools and guides