Know your profit
before you sell.
SellerSums calculates marketplace fees, referral fees, fulfillment, and net profit using the published fee schedules from Amazon, eBay, Etsy and Walmart — not estimates. 14 calculators across 4 countries.
One home for every marketplace fee.
Every calculator is built on the marketplace's live fee schedule — not scraped guesses. Pick where you sell.
Amazon
/ amazonReferral, FBA fulfillment and storage fees, with FBA compared against shipping it yourself.
Etsy
/ etsyListing, transaction, payment processing and Offsite Ads fees per sale.
eBay
/ ebayFinal value fees by category, per-order fees, international and Promoted Listings costs.
Walmart
/ walmartReferral fees by category and Walmart Fulfillment Services fees, WFS vs self-ship.
Built like an exchange — priced like a utility.
Every calculation is anchored to the actual marketplace rule, not a rounded estimate. That's the whole product.
Real marketplace fee schedules.
Every rate comes from the marketplace's own published fee table, checked against the source document. The schedules behind these calculators are current as of Jun 26, 2026.
Dated schedules.
Every fee table carries the date it took effect, so you can see exactly which rules a number came from.
Country-specific rules.
14 calculators across 4 countries, each in its own currency and units.
Compare fulfillment.
Profit analysis with no signup.
Everything runs client-side. Your product data never leaves the browser.
Instant results.
median calc time
Amazon FBA — try the real thing.
Type any listing and watch the profit resolve in milliseconds. This is the actual calculator, embedded.
Every calculator, in one place.
Each one runs on that marketplace's own published fee schedule, in its local currency and units. Pick one and start modeling in seconds.
Amazon.com Fee Calculator
Amazon.ca Fee Calculator
Amazon.co.uk Fee Calculator
Amazon.com.au Fee Calculator
Etsy Fee Calculator
Etsy Fee Calculator
Etsy Fee Calculator
Etsy Fee Calculator
eBay Fee Calculator
eBay Fee Calculator
eBay Fee Calculator
eBay Fee Calculator
Walmart Fee Calculator
Walmart Fee Calculator
Field notes for people who take margin seriously.
How marketplace fees actually work, and what they do to your margin.
Built on published fee schedules, not estimates.
Each calculator links the source document it was built from and shows the date that schedule took effect, so you can check any number yourself. Fees change — always confirm against your own seller account before pricing.