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Enter item price, buyer shipping, tax, and the fee settings that apply.
Free calculators for online sellers
Know what you'll keep before you list.
Current marketplace fees, actual costs, profit, margin, ROI, and target pricing in one clean calculation. No signup. No spreadsheet archaeology.
- Current fee sources
- Calculates locally
- Free, no account
- 15
- calculators
- 15
- fee guides
- 0
- data uploads
SALE SNAPSHOTLIVE
ITEM SOLD$100.00
Platform fees− $13.60
Item + fulfillment− $46.50
ESTIMATED PROFIT$39.90
39.9%Calculator library
Run the numbers before the offer arrives.
Each tool uses the platform's real fee bases and adds the costs generic payout calculators leave out.
Most used
eBay seller math
eBay Fee Calculator
Estimate eBay final value fees, promoted listing fees, net payout, actual profit, margin, ROI, and target sale price.
02
Payment math
PayPal Fee Calculator
Calculate current PayPal business transaction fees, net payment, profit, margin, and the price needed for a target profit.
03
Stripe payment math
Stripe Fee Calculator
Calculate current U.S. Stripe card, Terminal, ACH, and Link fees, net payout, profit, and the charge needed for a target profit.
04
Venmo seller math
Venmo Fee Calculator
Calculate current Venmo business, goods and services, Tap to Pay, and Instant Transfer fees with payout, profit, and target pricing.
05
Square payment math
Square Fee Calculator
Calculate current U.S. Square in-person, online, invoice, keyed, API, and Afterpay fees with payout, profit, and reverse pricing.
06
Amazon seller math
Amazon FBA Fee Calculator
Estimate 2026 Amazon U.S. referral, FBA fulfillment, plan, storage, inbound, payout, profit, and target price.
07
Etsy shop math
Etsy Fee Calculator
Estimate Etsy listing, transaction, payment processing, and Offsite Ads fees with net profit and target pricing.
08
Live-selling math
Whatnot Fee Calculator
Estimate Whatnot commission, payment processing, payout, profit, margin, ROI, and target sale price.
09
Resale math
Depop Fee Calculator
Calculate current U.S. Depop payment processing and optional boosted-listing fees with net profit and target price.
10
Menswear resale math
Grailed Fee Calculator
Estimate Grailed's current tiered seller commission, Stripe processing, payout, profit, margin, and target price.
11
Marketplace math
Mercari Fee Calculator
Estimate Mercari's current U.S. selling fee, payout, profit, margin, ROI, and target sale price.
12
Closet math
Poshmark Fee Calculator
Calculate Poshmark seller fees, net earnings, real profit, margin, ROI, and target listing price.
13
Cost and sales planning
Break-Even Calculator
Calculate break-even units and sales revenue after variable costs, marketplace fees, fixed transaction charges, and monthly fixed costs.
14
Business fundamentals
Profit Margin Calculator
Calculate gross profit, net profit, gross margin, net margin, and the revenue required for a target margin.
15
Pricing fundamentals
Markup Calculator
Convert cost and markup into selling price, profit, margin, and the price needed for a target margin.
More than a payout number
A listing can pay out and still lose money.
Marketplace Math separates the platform's cut from what the sale actually earns after inventory, shipping, packaging, and promotions.
Add your real costs
Include item cost, postage, supplies, and promoted-listing spend.
Protect the profit
See payout, profit, margin, ROI, and the sale price needed for your target.
Seller guides
The fee policy, translated.
Official sources, concrete formulas, and the edge cases that change your take-home amount.
01
Amazon FBA fee guide
Amazon FBA Fees: 2026 Fulfillment, Referral, Storage, and Seller Costs
Calculate 2026 Amazon U.S. FBA fulfillment, referral, storage, inbound, and selling-plan fees with formulas and worked profit examples.Read guide ↗02eBay fee guide
How Much Does eBay Take? Current Seller Fees Explained
Understand current eBay final value fees, order fees, promoted listings, category tiers, and the difference between payout and profit.Read guide ↗03PayPal fee guide
PayPal Business Fees: What a Seller Pays Per Transaction
Compare current U.S. PayPal Checkout, card, and QR transaction fees and learn how to calculate net payment and profit.Read guide ↗04Stripe fee guide
Stripe Fees Explained: Payment Processing Rates and Examples
Learn current U.S. Stripe processing fees for online cards, Terminal, ACH, Link, international cards, and reverse pricing with worked examples.Read guide ↗05Etsy fee guide
How Much Does Etsy Take? Listing, Transaction, Payment, and Ad Fees
See how Etsy listing, transaction, payment processing, and Offsite Ads fees stack together for a U.S. seller.Read guide ↗06Whatnot fee guide
Whatnot Seller Fees: Commission, Processing, and Net Earnings
Understand current Whatnot U.S. commission and payment-processing fees, their different bases, and how to estimate profit.Read guide ↗07Depop fee guide
Depop Seller Fees in the U.S.: Processing and Boosted Listings
Calculate current U.S. Depop payment processing and boosted-listing fees after the removal of the standard selling fee.Read guide ↗08Grailed fee guide
Grailed Seller Fees: The New 6% and 9% Commission Tiers
Understand Grailed's current under-$120 and $120-plus commission tiers, processing rates, shipping basis, and seller profit.Read guide ↗09Mercari fee guide
Mercari Selling Fees: The Current 10% U.S. Seller Fee
Understand Mercari's current U.S. 10% selling fee, what is included in the basis, and how to move from payout to profit.Read guide ↗10Poshmark fee guide
How Much Does Poshmark Take? The $2.95 and 20% Fee Tiers
Calculate Poshmark's two U.S. seller-fee tiers and understand how offers, shipping discounts, and item cost affect profit.Read guide ↗11Break-even guide
How to Calculate the Break-Even Point for Products and Marketplace Sales
Calculate break-even units and revenue with fixed costs, variable costs, contribution margin, marketplace fees, and worked examples.Read guide ↗12Margin guide
How to Calculate Profit Margin: Gross, Net, and Target Margin
Learn the formulas for gross profit, gross margin, net profit, net margin, and revenue required to reach a target margin.Read guide ↗13Pricing guide
Markup vs. Margin: Formulas, Examples, and Pricing Mistakes
Understand the difference between markup and margin, convert between them, and set prices that cover direct and marketplace costs.Read guide ↗14Square fee guide
Square Processing Fees: Current Rates, Formulas, and Examples
Learn current U.S. Square processing fees for in-person, online, invoice, keyed, API, and Afterpay payments with formulas and worked examples.Read guide ↗15Venmo fee guide
Venmo Fees: Business, Goods and Services, and Instant Transfer
Learn current Venmo business, goods and services, Tap to Pay, and Instant Transfer fees with formulas, examples, and payout guidance.Read guide ↗Price with evidence
Revenue is vanity. What you keep is the business.
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