MPMarginPilot
Free CSV review

500 free seller calculators

Find out whether an ecommerce product still works after the real costs show up

Estimate marketplace fees, shipping, tax reserves, ad cost, profit, and margin across 25 marketplaces and 20 selling regions, then move into a CSV review when you need SKU-level answers.

Browse calculatorsFree CSV reviewRead seller guides
25marketplaces covered across major seller channels
20country and currency contexts for pricing checks
500calculator pages for marketplace and country combinations
1 next stepmove from estimate to CSV review when real sales data arrives

Choose your starting point

Use the shortest path for the question you have right now

I sell on one marketplace

Start from Amazon, Etsy, eBay, Shopify, Walmart Marketplace, TikTok Shop, and more.

I need a country-specific check

Compare the same marketplace in USD, GBP, EUR, JPY, and other selling currencies.

I already have order data

Request a free CSV review to find low-margin SKUs, ad-cost pressure, and pricing risks.

Reliability and trust

Built for planning, with visible assumptions

Marketplace pages show fee-reference links, last-reviewed dates, and confidence notes so sellers can see what is estimated and what still needs official verification before pricing decisions.

Reference-first fee pages

Marketplace hubs point to source links and review notes instead of hiding assumptions.

Planning before scale

Calculators focus on profit after ads, shipping, returns, and tax reserves rather than headline revenue.

Natural next action

When estimates are no longer enough, the CSV review turns the same logic into a real product-level check.

Recommended next step

Turn a healthy margin estimate into the next revenue move

Use a dedicated profit dashboard when you already have orders, or compare marketplace margin against a direct Shopify store when platform fees are taking too much room.

Profit monitor

Track real product profit after the calculator

When the estimate looks promising, move into SKU-level profit tracking so ad spend, shipping drift, and refunds do not quietly erase margin.

Try TrueProfit

Owned channel

Compare marketplace margin with your own store

If marketplace fees are heavy, test whether a direct Shopify checkout gives you more room after payment fees, shipping, and repeat purchase potential.

Explore Shopify

Featured calculators

Amazon FBA Calculator Germany

Estimate Amazon FBA profit in Germany with VAT reserve, referral fees, fulfillment assumptions, ad spend, and net margin.

Etsy Profit Calculator USA

Check handmade, vintage, and digital product margin after listing, transaction, shipping, and ad costs.

Guides for new sellers

Margin terms to understand

  • Contribution Margin

    Contribution margin shows how much money remains from an order after variable costs such as fees, shipping, ads, and returns.

  • Net Margin

    Net margin is the percentage of order revenue left as profit after estimated ecommerce costs and reserves.

  • Breakeven Price

    Breakeven price is the minimum sale price needed to cover product cost, fees, shipping, ads, returns, and reserves.

  • Ad Cost Per Order

    Ad cost per order connects advertising spend to ecommerce profit by showing acquisition cost for each sale.

  • Return Reserve

    Return reserve is a planning allowance for refunds, damaged items, replacement orders, and return handling costs.

  • Marketplace Referral Fee

    A marketplace referral fee is the commission a marketplace charges on a sale, often varying by category and region.

  • ROAS

    ROAS means return on ad spend, but ecommerce sellers should compare it with contribution margin before scaling ads.

  • Landed Cost

    Landed cost is the full product cost after purchase price, freight, duties, packaging, and preparation costs.

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