Free seller tools
Free Ecommerce Calculators for Online Sellers
Ecom Profit Tools is a collection of free browser-based calculators for sellers who want to estimate fees, profit, margin, ROI, ROAS, and break-even sales before making pricing or promotion decisions. Inputs are editable, and results are estimates for planning.
Seller planning snapshot
Available calculators
18 tools
Profit, fee, margin, ROI, ROAS, and break-even coverage.
Platform support
8 channels
Calculation style
Input-first
Platform coverage
Platform badges
Who is this for?
These tools are for Shopify store owners, Etsy makers, Amazon and eBay marketplace sellers, TikTok Shop merchants, WooCommerce store operators, and small businesses accepting online payments. They are useful when a seller needs a straightforward estimate before choosing a price, comparing channels, planning advertising, or reviewing the costs behind a sale.
Marketplace sellers
Consider listing, referral, transaction, delivery, and optional promotion costs.
Independent stores
Review payment processing, product, shipping, hosting, app, and advertising assumptions.
Campaign planners
Compare margin, ROAS, ROI, and break-even scenarios before changing spend.
What calculators are included?
Choose the calculator that matches the decision you are making. Each tool page explains its inputs, formulas, assumptions, and common mistakes in plain English.
Store and marketplace profit
Model the revenue and operating costs behind orders on popular ecommerce channels.
5tools in this category →
Seller and payment fees
Review editable payment, platform, referral, or promoted listing fee assumptions.
8tools in this category →
Pricing and performance planning
Compare margin, pricing, advertising return, investment return, and sales targets.
5tools in this category →
Store and marketplace profit
Model the revenue and operating costs behind orders on popular ecommerce channels.
Calculator
Shopify Profit Calculator
Estimate Shopify store revenue, fees, advertising cost, net profit, margin, ROI, and break-even ROAS.
Open Shopify Profit Calculator→Calculator
Etsy Profit Calculator
Estimate Etsy profit across multiple modeled orders after product, delivery, listing, payment, transaction, and optional ad fees.
Open Etsy Profit Calculator→Calculator
Amazon FBA Profit Calculator
Model Amazon FBA revenue, referral and fulfillment fees, inventory costs, advertising, margin, and ROI.
Open Amazon FBA Profit Calculator→Calculator
TikTok Shop Profit Calculator
Model TikTok Shop revenue, seller fees, campaign costs, per-unit profit, margin, and ROI.
Open TikTok Shop Profit Calculator→Calculator
WooCommerce Profit Calculator
Estimate WooCommerce order profit after inventory, shipping, payment processing, hosting, plugins, and advertising.
Open WooCommerce Profit Calculator→Seller and payment fees
Review editable payment, platform, referral, or promoted listing fee assumptions.
Calculator
Shopify Fee Calculator
Estimate Shopify payment processing and applicable additional transaction fees from sales and order volume.
Open Shopify Fee Calculator→Calculator
Etsy Fee Calculator
Estimate Etsy transaction, payment processing, listing, and optional offsite ad fees alongside your net profit.
Open Etsy Fee Calculator→Calculator
Amazon Referral Fee Calculator
Estimate Amazon referral fees using an editable category percentage and optional minimum fee per unit.
Open Amazon Referral Fee Calculator→Calculator
eBay Fee Calculator
Estimate eBay final value and optional promoted listing fees, then calculate order profit and margin.
Open eBay Fee Calculator→Calculator
eBay Promoted Listing Fee Calculator
Estimate an eBay promoted listing ad fee across attributed sales using an editable ad rate assumption.
Open eBay Promoted Listing Fee Calculator→Calculator
TikTok Shop Fee Calculator
Estimate TikTok Shop platform, affiliate commission, and optional fixed per-order fees from gross sales.
Open TikTok Shop Fee Calculator→Calculator
PayPal Fee Calculator
Estimate a PayPal transaction fee, the amount you keep, and the effective fee rate from a payment received.
Open PayPal Fee Calculator→Calculator
Stripe Fee Calculator
Estimate a Stripe transaction fee and net payout amount using editable processing fee assumptions.
Open Stripe Fee Calculator→Pricing and performance planning
Compare margin, pricing, advertising return, investment return, and sales targets.
Calculator
Profit Margin Calculator
Turn revenue and cost into gross profit, profit margin, and markup for fast pricing analysis.
Open Profit Margin Calculator→Calculator
Markup Calculator
Set a markup above cost and see the resulting selling price, dollar profit, and profit margin.
Open Markup Calculator→Calculator
ROI Calculator
Measure net return and return on investment for inventory, software, promotions, or business projects.
Open ROI Calculator→Calculator
ROAS Calculator
Calculate return on ad spend and revenue after advertising cost for ecommerce campaign review.
Open ROAS Calculator→Calculator
Break Even Calculator
Find contribution margin, units needed to recover fixed costs, and the revenue required to break even.
Open Break Even Calculator→How sellers can use these tools
- Choose a tool for the channel or question being reviewed, such as an Etsy order, a PayPal payment, or an advertising campaign.
- Enter costs and fee assumptions that match the product, account, payment setup, and period being considered.
- Compare more than one scenario, such as a price change, shipping offer, promotion, or advertising budget.
- Check important assumptions against current account terms and actual reports before taking action.
Why accurate profit estimates matter
Sales totals do not show what a seller keeps. Product cost, shipping, payment charges, marketplace fees, advertising, returns, subscriptions, and discounts may all reduce the margin available from an order.
A useful estimate makes those assumptions visible before a seller increases inventory, offers a discount, or scales an ad campaign. Calculator results are not guaranteed fee quotes or financial advice. Actual results depend on current terms and the seller's records.
Seller workflow resource
Exploring AI support for ecommerce work?
After estimating fees, profit, and advertising room, review our guide to AI tool categories for ecommerce sellers, including product copy, photos, SEO, ads, customer support, and email marketing workflows.
Frequently asked questions
Are these ecommerce calculators free to use?+
Yes. Ecom Profit Tools calculators are free to use in your browser and do not require an account.
Do calculator results show my exact seller fees?+
No. Results are estimates based on the inputs you enter. Marketplace and payment fees can vary by country, currency, account terms, category, and policy changes, so verify applicable terms before making decisions.
Which calculator should a new seller start with?+
Start with a channel-specific profit or fee calculator for the platform where you sell, such as Shopify, Etsy, or Amazon FBA. Then use margin, ROAS, ROI, or break-even tools for broader planning.
Can I use these tools before launching a product?+
Yes. Sellers can compare possible prices, costs, fee assumptions, advertising budgets, and sales targets before listing a product or ordering inventory.