29 free tools · No sign-up

Free tools for online sellers

Calculate marketplace fees, profit, ad performance and shipping — for Amazon, Etsy, eBay, Walmart and Shopify. Fast, accurate and private.

  • verifiedFees verified October 2026
  • money_off100% free · no sign-up
  • lockPrivate — runs in your browser
  • balanceIndependent, not affiliated
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Featured · Free AI tool

AI Listing Generator

Write a product title, bullet points, description and keywords in seconds — following the rules of Amazon, Walmart, eBay, Etsy or Shopify.

AmazonWalmarteBayEtsyShopify
Generate a listing free

Most popular

local_mallAmazon Fee CalculatorReferral fees by category, FBA and profitOpen tool shopping_bagEtsy Fee CalculatorListing, transaction, processing and ads feesOpen tool account_balance_walletPayPal Fee CalculatorPayPal fees and how much to chargeOpen tool pie_chartProfit Margin CalculatorMargin from price, or price from marginOpen tool campaignACoS & ROAS CalculatorACoS, ROAS and TACoS from ad resultsOpen tool deployed_codeDimensional Weight CalculatorDIM weight and billable weight by carrierOpen tool

Today for sellers

New tip and flashcard every day

● 29 free tools//● No sign-up//● 2026 fees, verified//● Runs in your browser//● Amazon · Etsy · eBay · Walmart · Shopify//
storefront

Marketplace Fees

What marketplaces charge per sale

See all 4 ›
local_mallAmazon Fee CalculatorReferral fees by category, FBA and profitshopping_bagEtsy Fee CalculatorListing, transaction, processing and ads feesgaveleBay Fee CalculatorFinal value fee, per-order fee and profitstoreWalmart Fee CalculatorReferral fees by category, WFS and profit
payments

Payment Fees

Processing fees and what to charge

See all 4 ›
account_balance_walletPayPal Fee CalculatorPayPal fees and how much to chargecredit_cardStripe Fee CalculatorCard fees, international and payoutspoint_of_saleSquare Fee CalculatorOnline, in-person and keyed-in ratesshopping_cartShopify Payments Fee CalculatorCard rates by plan and gateway fees
sell

Pricing & Profit

Set prices that leave real profit

See all 4 ›
pie_chartProfit Margin CalculatorMargin from price, or price from margintrending_upMarkup CalculatorSelling price from cost and markuplocal_offerDiscount CalculatorSale price and the profit a discount coststimelineBreak-Even CalculatorUnits and revenue to cover your costs
ads_click

Marketing & Ads

Know if your marketing makes money

See all 4 ›
campaignACoS & ROAS CalculatorACoS, ROAS and TACoS from ad resultsbalanceBreak-Even ROAS CalculatorThe ROAS and ACoS you need to profitquery_statsConversion Rate & AOV CalculatorConversion rate, AOV and revenue per visitorgroupsCAC & LTV CalculatorAcquisition cost vs customer lifetime value
local_shipping

Shipping & Logistics

Shipping weight and true unit cost

See all 5 ›
deployed_codeDimensional Weight CalculatorDIM weight and billable weight by carrierinventory_2Landed Cost CalculatorTrue per-unit cost with freight and dutyview_in_arCBM CalculatorCubic meters, container fit and freight weightredeemFree Shipping Threshold CalculatorA free-shipping minimum that pays for itselfnotifications_activeReorder Point CalculatorSafety stock and when to reorder
construction

Listing & Store Tools

Everyday utilities for listings and stores

See all 8 ›
auto_awesomeAI Listing GeneratorTitles, bullets and descriptions for 5 marketplacesfact_checkListing CheckerLimits, mobile cut-off and risky wordsdata_usageBackend Keyword Byte CounterAmazon search terms under 250 bytescode_offListing HTML CleanerStrip styles, scripts and bad tagsbarcodeUPC / EAN ValidatorCheck digits for UPC, EAN and GTINdata_objectProduct Schema GeneratorJSON-LD for Shopify & WooCommercephoto_size_select_largeImage Resizer & WebP ConverterSquare product photos, compressedassignment_returnReturn & Shipping Policy GeneratorReady-to-use store policies
Verified fee rates

Rates you can check yourself

The headline rates our calculators use, last checked October 2026, each linked to the platform’s official page. Every rate is editable in the calculator to match your own account.

storefrontMarketplaces

Amazon

verifiedVerified

15%

referral fee · most categories

$0.30 minimum per item

Official source ↗Calculate ›

Etsy

verifiedVerified

9.5%

+ $0.45 per order

6.5% transaction + 3% + $0.25 processing + $0.20 listing

Official source ↗Calculate ›

eBay

verifiedVerified

13.6%

+ $0.40 per order

final value fee · most categories

Official source ↗Calculate ›

Walmart

verifiedVerified

15%

referral fee · most categories

no monthly or listing fee

Official source ↗Calculate ›

paymentsPayment providers

PayPal

verifiedVerified

3.49%

+ $0.49 · Checkout

2.99% + $0.49 goods & services

Official source ↗Calculate ›

Stripe

verifiedVerified

2.9%

+ $0.30 · card payments

+1.5% international cards

Official source ↗Calculate ›

Square

verifiedVerified

3.3%

+ $0.30 · online, Free plan

2.6% + $0.15 in person

Official source ↗Calculate ›

Shopify Payments

verifiedVerified

2.9%

+ $0.30 · Basic, online

2.7% Grow · 2.5% Advanced

Official source ↗Calculate ›

event_availableAll rates last checked October 2026 · US rates · editable in every calculator

Recent fee changes

We update our calculators when platforms change their fees — bookmark this page to stay current.

Why KleverKlimb

Built to be trusted

Seller tools you can rely on when real money is on the line.

01verified

Current fees

Default rates are checked against each platform for 2026, linked to the official source, and fully editable to match your account.

02lock

Private by design

Calculators run in your browser. No sign-up, and nothing you type into a calculator is stored.

03storefront

Every way you sell

Marketplaces, payment providers and your own Shopify or website store — in one place.

Listing tips

What makes a listing convert

Four habits of listings that rank well and sell — whichever marketplace you use.

01search

Lead with what buyers search

Put the product type, key attribute and size near the start of the title. Mobile results cut titles short, so the first 60–80 characters matter most.

02workspace_premium

Sell the outcome, then prove it

Open each bullet with a benefit (“Stays ice-cold all day”) and back it with a fact (“double-wall vacuum, 24 hours cold”).

03gpp_maybe

Avoid words that get flagged

Superlatives (“best”, “#1”), medical claims (“cures”) and germ-killing claims (“antibacterial”) can get listings suppressed. The Listing Checker flags common ones.

04format_list_bulleted

Don’t stuff keywords

Repeating a keyword doesn’t help ranking. Use each term once, and put spelling variations in backend keywords or tags where supported.

Already have a listing?

Check it against limits and risky words in seconds — free and instant.

fact_check Open listing checker →
Learn

Understand the numbers

Plain-English guides, a seller glossary and flashcards.

Guide · 6 min read

Amazon Seller Fees Explained (2026)

Guide · 5 min read

Etsy Fees Explained (2026): What Etsy Takes From Every Sale

Guide · 4 min read

PayPal Fees for Business (2026) — and How Much to Charge

Test yourself with flashcards

Fees, formulas and terms every seller should know.

Open the Learn hub →
FAQ

Questions, answered

Q1Are these tools really free?
Yes — every tool, including the AI Listing Generator, is free with no sign-up. The site is supported by advertising.
Q2How accurate are the fee calculators?
Each fee calculator uses rates checked against the platform’s published fees, shows when they were last checked and links to the official source. Fees can differ by account, so every rate is editable.
Q3Do you store my numbers?
No. Calculators run entirely in your browser. Only the AI Listing Generator sends text to an AI provider — see our Privacy Policy.
Q4Which marketplaces are covered?
Amazon, Etsy, eBay and Walmart, payment providers PayPal, Stripe, Square and Shopify Payments, plus tools for independent Shopify and website stores.
Q5Can I publish AI-generated listings as-is?
Treat them as a strong first draft. AI can get details wrong, so check every fact, measurement and claim against your product and the marketplace’s policies before publishing.
Q6Are you affiliated with these marketplaces?
No. KleverKlimb is independent. Marketplace names are trademarks of their respective owners and are used only to describe compatibility.

Results are estimates and AI-generated drafts are for guidance only. You are responsible for your listings, prices and compliance with each marketplace’s policies.