Who the Site Is For
Commerce Tally is for marketplace sellers, independent ecommerce shop owners, side-hustle product businesses, handmade sellers, resellers, and small teams that need quick estimates before making pricing and operations decisions. It can help an Etsy seller test whether a listing price leaves room after fees, an eBay seller compare promoted listing costs, an Amazon seller model platform expenses, or a store owner check whether free shipping is quietly reducing margin.
The site is also useful for people learning ecommerce math. Margin, markup, break-even units, dimensional weight, payment fees, and inventory turnover are simple concepts when separated, but they can become confusing when every cost happens on the same order. The guides connect those concepts in plain language.
How We Approach Calculator Content
Commerce Tally does not treat a calculator page as only a form and a result. Each core page includes an explanation of what the calculator does, how to use it, how the math works, interpretation tips, related tools, related articles, and FAQ content based on common seller questions. This makes the site more useful for visitors and easier for search engines to understand.
Fee-related calculators use editable assumptions because marketplace, payment, tax, and shipping rates can change. Sellers should verify current rates with the relevant platform, carrier, processor, or professional advisor before making important decisions.
Main Calculators
Profit Margin Calculator
Stop guessing — calculate your true ecommerce profit margin in seconds. Enter sale price, product cost, Amazon/Etsy fees, and shipping to see exactly what you keep. Free profit margin calculator. Try it now.
Markup Calculator
Calculate product markup percentage from cost and selling price. Compare markup vs profit margin, and set ecommerce prices that protect your bottom line. Start calculating now.
Selling Price Calculator
Find the right selling price for your products. Enter cost, target margin or markup, and calculate a price that covers fees, shipping, and profit. Try it free today.
Break-Even Calculator
Find your break-even point in units and revenue. Enter fixed costs, selling price, and variable costs to see how many sales you need to cover every expense. Calculate now.
Shipping Cost Calculator
Calculate your true shipping cost per order. Add carrier rates, surcharges, packaging, and handling to see the full fulfillment cost and protect your margins. Start here.
Dimensional Weight Calculator
Calculate dimensional (DIM) weight in imperial or metric units with carrier divisors for USPS, UPS, and FedEx. See billable weight and avoid surprise shipping charges. Free.
Marketplace Fee Calculator
How much do Etsy, eBay, and Amazon fees really cost? Enter your sale price and platform fees to see net proceeds instantly. Free marketplace fee calculator — compare seller fees side by side.
Etsy Fee Calculator
Know exactly what Etsy takes from each sale. Calculate listing fees, transaction fees, payment processing, and ad costs to see your real net profit. Free Etsy fee calculator — start now.
eBay Fee Calculator
Find out what you really keep after eBay final value fees. Enter sale price, category fees, and promoted listing costs to see your true take-home amount. Free eBay fee calculator — try it now.
Amazon Fee Calculator
Estimate 2026 Amazon seller fees — referral, closing, FBA fulfillment, and storage — no ASIN needed. See your real net profit per sale. Free Amazon fee calculator.
Payment Fee Calculator
Calculate net after payment processing — 2.9% + $0.30, 3% flat, or any rate. See exactly what you receive per transaction and gross up prices. Free payment fee calculator — start now.
Discount Calculator
Calculate sale prices and discount impacts before you promote. Enter original price and discount to see the final price, savings, and whether your margin survives the sale. Try it free.
Return Cost Calculator
See exactly what a return costs: restocking, shipping, refunds, and damaged inventory. Free calculator shows your real profit impact per return.
Inventory Turnover Calculator
Calculate your inventory turnover ratio and days inventory outstanding. Enter COGS and average inventory to see how fast products sell and free up cash. Start calculating now.
Sales Tax Calculator
Calculate sales tax amounts and tax-inclusive prices instantly. Enter one or two tax rates — including stacked taxes like Quebec GST + QST — to see each tax and the total. Try the free sales tax calculator.
Amazon FBA vs FBM Calculator
Which is more profitable: Amazon FBA or FBM? Enter your sale price and costs to compare net profit side by side. Free FBA vs FBM calculator — start now.
Third-Party Delivery Cost Calculator
What do DoorDash, Uber Eats, and Grubhub really cost you? Enter order value, commission, and delivery fees to see your net per order and per month. Free delivery cost calculator.
Alibaba Transaction Fee Calculator
What does Alibaba really charge? Enter your order value, transaction fee, and payment fee to see total fees and your net per order. Free Alibaba fee calculator — start now.
Important Limits
Commerce Tally provides educational estimates only. The site is not a substitute for accounting software, tax software, legal advice, business consulting, official marketplace fee statements, or carrier rate quotes. Results depend on the assumptions entered by the user and may not reflect refunds, discounts, category-specific fees, regional rules, subscriptions, negotiated rates, or future platform changes.
The best use of the site is comparison and planning. Run a conservative estimate, check related costs, compare with real order history, and update the assumptions as your business changes.