--- title: "Free Ecommerce Calculators: ROAS, Margin and Ad Budget" description: "Free calculators for Google Shopping merchants: break-even ROAS, margin, ad budget, MER and ABC analysis, plus tools to check conversion tracking." canonical: "https://www.productmetrics.io/tools" pageType: hub language: en alternates: en: "https://www.productmetrics.io/tools" nl: "https://www.productmetrics.io/nl/tools" de: "https://www.productmetrics.io/de/tools" x-default: "https://www.productmetrics.io/tools" publisher: "Product Metrics" dateModified: 2026-10-15 --- > Content index: https://www.productmetrics.io/llms.txt # Free ecommerce calculators and tools Free calculators for the numbers behind Google Shopping and Performance Max: what a product earns, what an ad click can cost and which products matter most. No sign-up. ## Profit and margin What a product earns after its costs, and the return it needs from ads. - [Break-even ROAS calculator](https://www.productmetrics.io/break-even-roas-calculator): Free break-even ROAS calculator: find the return each product needs to cover costs. Include margin, VAT, returns and fees, then set a target ROAS. - [Markup and margin calculator](https://www.productmetrics.io/margin-calculator): Free markup and margin calculator, also a margin calculator UK with VAT in £: get margin, markup, profit and price from cost, for one product or a list. - [POAS calculator](https://www.productmetrics.io/poas-calculator): Free POAS calculator: enter revenue, costs and ad spend to get your profit on ad spend, break-even (1.0) and profit per ad euro. Formula and example included. - [MER and nCAC calculator](https://www.productmetrics.io/mer-calculator): Free MER and CAC calculator: enter revenue, marketing and ad spend, orders and new customers to get MER, nCAC, blended ROAS, cost per order and marketing ROI. ## Ads What a budget buys, and how the standard ad ratios are worked out. - [Google Ads budget calculator](https://www.productmetrics.io/google-ads-budget-calculator): Free Google Ads budget calculator: turn a daily budget and average CPC into clicks per product, and see the maximum cost per click your margin allows. ## Tracking See what your tracking sends and which blockers stop it. - [Product Metrics SDK debugger](https://www.productmetrics.io/sdk-debugger): Free Product Metrics SDK debugger: paste a tracking request body to decode the compressed base64url event and check it the way the collector does. - [Adblocker benchmark](https://www.productmetrics.io/ad-blocker-conversion-tracking): Do ad blockers block conversion tracking? uBlock Origin, Brave, AdGuard and 3 more tested on Google Ads, GA4, Meta and 7 tags, plus what it costs your ROAS. ## Calculate for your platform - [All profit and ROAS calculators](https://www.productmetrics.io/calculators) - [Shopify Fee Calculator](https://www.productmetrics.io/calculators/shopify-fee-profit-calculator): See what a US Shopify order leaves after card processing, product costs, delivery and ads. Start with Basic online card rates, then edit the fees to match your store. - [Etsy Fee Calculator](https://www.productmetrics.io/calculators/etsy-fee-profit-calculator): Estimate US Etsy selling fees and profit on one shipped item. Include listing, transaction and Etsy Payments fees, then test the effect of an Offsite Ads order. - [eBay Fee Calculator](https://www.productmetrics.io/calculators/ebay-fee-profit-calculator): Calculate US eBay fees for a seller without a Store subscription. Choose a supported category, include tax in the fee basis and add promoted-listing costs where applicable. - [WooCommerce Profit Calculator](https://www.productmetrics.io/calculators/woocommerce-fee-profit-calculator): Work out US WooCommerce profit after the payment gateway, hosting, plugins, shipping and advertising. Choose WooPayments, Stripe or PayPal, then spread your monthly bills over your orders. - [Amazon Profit Calculator](https://www.productmetrics.io/calculators/amazon-fee-profit-calculator): Estimate Amazon referral fees and profit for a US product. Enter your own FBA fulfilment and storage quote, then see the break-even advertising return. - [Dropshipping Profit Calculator](https://www.productmetrics.io/calculators/dropshipping-profit-calculator): Test whether a US dropshipping order can fund its ads after supplier cost, delivery, payment fees, refunds and chargebacks. There is no dropshipping fee, so every cost line is yours to edit. - [Walmart Fee Calculator](https://www.productmetrics.io/calculators/walmart-fee-profit-calculator): Estimate US Walmart Marketplace referral fees and profit, with editable WFS fulfilment costs. Start with a Home and Kitchen referral rate and a standard lightweight WFS example. - [TikTok Shop Fee Calculator](https://www.productmetrics.io/calculators/tiktok-shop-fee-profit-calculator): Estimate US TikTok Shop order profit after referral fees, creator commission, delivery and ads. Set the category rate and commission from your Seller Center agreement. ## Embed these calculators on your own site. The calculators listed here have an “Embed this calculator” section near the foot of their page. It gives you one script tag to paste into your own page: the same maths, no sign-up, and a link back to the full version that you keep. - [Break-even ROAS calculator](https://www.productmetrics.io/break-even-roas-calculator#embed): embed code - [Markup and margin calculator](https://www.productmetrics.io/margin-calculator#embed): embed code - [POAS calculator](https://www.productmetrics.io/poas-calculator#embed): embed code - [MER and nCAC calculator](https://www.productmetrics.io/mer-calculator#embed): embed code - [Google Ads budget calculator](https://www.productmetrics.io/google-ads-budget-calculator#embed): embed code ## Dutch and German versions where they exist. Dutch and German versions exist for the break-even ROAS and margin calculators. - [ROAS berekenen: break-even ROAS calculator](https://www.productmetrics.io/nl/roas-berekenen): Dutch - [ROAS berechnen: Break-even-ROAS-Rechner](https://www.productmetrics.io/de/roas-berechnen): German - [Marge berekenen: marge- en opslagcalculator](https://www.productmetrics.io/nl/marge-berekenen): Dutch - [Marge berechnen: Margen- und Aufschlagrechner](https://www.productmetrics.io/de/marge-berechnen): German ## Run the numbers on one product, or segment all of them. Product Metrics segments your products by advertising clicks and return against your target, then writes each segment to a Merchant Center label your campaigns use. - [Analyse your products for free](https://app.productmetrics.io/): log in with Google, no credit card --- Published by Product Metrics (Berend Vrakking, founder). HTML version: https://www.productmetrics.io/tools