Home/Calculators
Every calculator, one page
Each tool runs the real published fee schedule, shows every charge on its own line, and lets you override any rate that does not match your account.
Marketplaces
Amazon FBA Profit Calculator
Referral fee, fulfilment by size tier, fuel surcharge and net per unit.
Etsy Fee Calculator
Listing fee, 6.5% transaction, processing and Offsite Ads.
eBay Fee Calculator
Final value fee by category, per-order fee and Promoted Listings.
NewWalmart Marketplace Fee
Tiered referral fees by contract category, plus optional WFS.
NewShopify Fee Calculator
Plan fee, processing, gateway surcharge and break-even orders.
NewTikTok Shop Fee Calculator
6% referral with processing included, creator commission, refunds.
Resale apps
Poshmark Fee Calculator
$2.95 flat under $15, 20% above it, and the bundling maths.
NewMercari Fee Calculator
10% flat, no seller processing fee since 2025, shipping trap.
NewDepop Fee Calculator
0% commission for US sellers — processing and boosts only.
NewStockX Fee Calculator
9% at Level 1 falling to 7%, 3% processing and $5 shipping.
NewWhatnot Fee Calculator
8% commission on the item, processing on the whole transaction.
Payments
PayPal Fee Calculator
2.99% + $0.49, cross-border surcharges and gross-up.
NewStripe Fee Calculator
2.9% + 30¢ plus international and conversion surcharges.
Import & duty
Two platforms, one item
Fee percentages are not comparable across platforms — 8% plus $4 shipping is not cheaper than 20% with everything included. These pages run the same item through both schedules and rank them by what actually lands in your account.
About these calculators
Which calculators are free?
All of them. There is no signup, no email capture and no paywall — every calculator runs entirely in your browser and nothing you type leaves the page.
How current are the fee rates?
Every page is built on the 2026 published fee schedules and lists its sources at the bottom. Each field is editable, because categories, seller tiers and countries change the rate and only your dashboard knows your exact numbers.
Why do some pages use tiered rates?
Because the platforms do. eBay charges different final value fees by category, Walmart uses price bands for apparel and marginal tiers for electronics, and Poshmark switches between a flat fee and a percentage at $15. Applying one headline percentage would give you the wrong answer.
Can I compare two platforms on the same item?
Run the same sale through both calculators and compare the profit per unit rather than the fee percentage. Each marketplace page links to two alternatives, and the fee structures are modelled separately rather than averaged.