FREE TOOLS FOR SMARTER ONLINE SELLERS

Free Seller Calculators & Image Tools

Free profit calculators and listing tools for Etsy, Amazon, eBay, Shopify, WooCommerce and independent sellers.

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✓ No signup✓ Free to use✓ Mobile friendly✓ Editable fee assumptions

Find the right tool for your business

Explore practical calculators and browser-based image utilities. All estimates use your inputs; marketplace fees can change.

Etsy

Etsy Profit Calculator

Estimate Etsy profit after listing, transaction, payment processing, shipping, and production costs.

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eBay

eBay Profit Calculator

Estimate eBay selling profit with editable final value fees, order fees, and expenses.

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Amazon

Amazon FBA Profit Estimator

Estimate Amazon marketplace profit with manually entered referral and fulfillment fees.

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Shopify

Shopify Profit Calculator

Calculate Shopify order profit with editable payment processing and other costs.

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Print-on-demand

Print on Demand Profit Calculator

Estimate print-on-demand margins after base product, fulfillment, platform, and marketing costs.

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Advertising

Break-even ROAS Calculator

Find the minimum return on ad spend required to break even.

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Wholesale

Wholesale Margin Calculator

Estimate wholesale gross margin, markup, and profit per unit.

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Shipping

Dimensional Weight Calculator

Calculate dimensional weight from package dimensions and a configurable carrier divisor.

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Returns

Return Loss Calculator

Estimate the total loss of a returned order with recoverable inventory value.

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Pricing

Bundle Pricing Calculator

Calculate a target selling price for a bundle from costs and desired profit margin.

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Image tools

Image Format Converter

Convert JPG, PNG, WebP and AVIF images privately in your browser.

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Image tools

Image Resizer & Compressor

Resize, compress, and convert JPG, PNG, and WebP files in your browser.

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Image tools

Image Upscaler (Browser Resize)

Enlarge an image 2× or 4× using browser interpolation; not AI detail reconstruction.

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Image tools

Background Remover (Solid Colors)

Remove plain white or chosen solid-color backgrounds and export a transparent PNG.

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Seller tools

Bulk CSV Profit Calculator

Calculate gross profit and margins for multiple products from a CSV file.

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AI image tools

AI Background Remover

Remove image backgrounds with an in-browser AI model; results vary by image.

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AI image tools

AI Image Upscaler (Beta)

Experimental AI-assisted image enlargement; device and model compatibility varies.

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New · Free

WooCommerce Profit Calculator

Estimate profit after product, payment processing, shipping and marketing costs.

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New · Free

Etsy Tag Generator

Create up to 13 editable Etsy tag ideas from your product keywords.

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New · Free

Product Description Generator

Create an editable product description using your own product details.

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New · Free

Listing Title Optimizer

Build readable, keyword-focused listing title suggestions.

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START HERE

Popular seller workflows

Start with the question you need to answer, then open the matching calculator.

START WITH THE RIGHT NUMBERS

Which seller calculator should you use?

Choose a marketplace calculator when you know your selling price and expected costs. Enter the fee rates shown in your own seller account: marketplace fees, subscriptions, taxes and payment processing can vary by country, category and account.

Marketplace profit

For an Etsy order sold for $40, subtract product cost, shipping, listing and transaction fees, payment processing and advertising. The remainder is estimated profit before any additional taxes or overhead.

Try the Etsy calculator →

Pricing and advertising

Use gross margin when deciding whether a price covers costs. Use break-even ROAS to understand the minimum return needed to cover product and fulfillment costs before scaling ads.

Find your break-even ROAS →

Listing helpers

Generate draft Etsy tag ideas and listing copy, then check every claim against the actual product. Keyword suggestions do not represent measured search volume or guaranteed rankings.

Explore tag ideas →

Accuracy note: These tools are independent estimates, not official calculators of Etsy, Amazon, eBay, Shopify or WooCommerce. Always confirm the current fee schedule and your own account charges before making business decisions.

HOW WE WORK

Clear numbers, no mystery fees

SellerCalc Hub provides independent planning estimates, not official quotes. Enter your actual product costs and check the latest marketplace and payment processing fees before making pricing decisions.

Are these calculators free?

Yes. You can use the calculators without creating an account.

Are marketplace fee rates always current?

No. Platform fees vary by country, category, account and date. Example defaults are illustrative; review and edit the fee fields before relying on results.

Do image tools upload my files?

Core browser image tools process images locally. Some experimental AI tools may download models to your device. Read each tool page for its specific behavior.

Can I use the profit results for accounting?

These are estimates for planning. Confirm taxes, returns, discounts, currency conversion and actual settlement fees with your marketplace and accountant.

How it works

Each tool runs directly in your browser. Enter your actual product costs, current platform fees, and shipping expenses to estimate your margins. Defaults are examples, not official marketplace rates.

For accurate business decisions, confirm current fees with the marketplace and your payment provider.

AI Image Tools (Beta)

Try real browser-based AI models. First use requires a model download; some devices may not support them.

AI Background Remover AI Image Upscaler (Experimental)

Free image converters

Prepare product photos and everyday images without uploading your files. Start with the online image converter, or choose a specific conversion.

Find every tool in one place

Browse the complete tools directory for marketplace profit, pricing, shipping, image conversion and product listing helpers. Each tool includes practical instructions and clear limitations.

Resize to a common file-size target

Start with a preset and adjust the dimensions to match your upload requirements. File-size targets are approximate.