Ecommerce & Dropshipping calculators
Amazon FBA, Etsy, dropshipping, and break-even ROAS calculators for online sellers and marketers running paid ads.
If you sell on more than one marketplace — or you're trying to decide which one is worth your time — these calculators answer the question generic profit tools can't: what a specific product actually nets you on Amazon FBA, Etsy, eBay, Shopify, or as a dropshipped item, once every platform-specific fee is accounted for. That's a real, well-documented gap. Sellers report Amazon's own calculator promising $8-10 in profit while actual payouts land closer to $5; Etsy's Offsite Ads fee is charged on the full order total, not just the item price, turning a 15% headline rate into a 31% real hit; and multi-platform sellers lose real time — reportedly up to 40% of it — juggling separate tabs and spreadsheets just to compare the same numbers. Each calculator here (Amazon FBA, Etsy Fees, eBay Fees, Shopify Fees, Dropshipping Profit, and Break-even ROAS) models its platform's real fee structure — category-tiered rates, per-order fees, ad spend, and return-to-origin loss — instead of collapsing everything into one misleading flat percentage. And when you're ready to compare a specific product across all five platforms at once, the Marketplace Fee Matrix runs the same numbers through every fee schedule side by side, so you can see where it's actually most profitable to sell before committing more inventory.
Amazon FBA Fee & Profit Calculator
Calculate your true net profit on Amazon FBA — referral fee, fulfillment fee, shipping to Amazon, and product cost — the real math behind the gap between what a calculator promises and what actually lands in your payout.
Etsy Fee Calculator
Calculate your net profit on Etsy after listing, transaction, payment processing, and Offsite Ads fees — modeled the way Etsy actually charges them, on your full order total including shipping, not just the item price.
Dropshipping Profit Calculator
Calculate your real dropshipping profit after product cost, ad spend, shipping, and return-to-origin (RTO) losses — the cost line most profit estimates quietly leave out, and often the one that actually decides whether a product is viable.
Break-even ROAS Calculator
Find the minimum return on ad spend (ROAS) at which a campaign covers its own cost — zero profit, zero loss on the ad spend itself — based on your profit margin. This is the floor to know before setting a target ROAS, not the target itself.
eBay Fee Calculator
Calculate your net payout and profit margin on eBay after the Final Value Fee and per-order fee — applied the way eBay actually charges them, on your total order amount including shipping and tax, not the item price alone.
Shopify Fee Calculator
Calculate your net payout and profit margin on Shopify after Shopify Payments processing fees — see exactly how much a plan upgrade would save per sale, and what you're paying extra for if you're not using Shopify Payments at all.
Frequently asked questions
Which platform has the lowest fees?
There's no single answer — it depends entirely on your product's price point, category, and shipping cost, which is exactly why a flat 'platform X is cheapest' claim is usually wrong for at least some sellers. Run your specific numbers through the Marketplace Fee Matrix to compare Etsy, eBay, Amazon FBA, Poshmark, and Shopify side by side for your actual product, rather than relying on a generic ranking.
Should I use the individual calculators or the Marketplace Matrix?
Use the individual calculators (Amazon FBA, Etsy Fees, eBay Fees, Shopify Fees) when you already know which platform you're selling on and want the full breakdown — category-specific rates, per-order fees, scale projections, and a detailed FAQ for that platform's quirks. Use the Marketplace Matrix when you're deciding where to sell a product in the first place, or want to check whether a platform you're already on is still the best option.
Do these calculators account for VAT or international fees?
Mostly no, and each calculator says so explicitly where it matters — Amazon FBA's calculation, for example, excludes VAT the same way Amazon's own official calculator does, which is a documented gap that overstates profit for VAT-registered sellers. Check each calculator's FAQ section for its specific caveats, since international fee treatment (VAT, regional payment-processing rates) varies by platform and isn't uniformly modeled here yet.