No Server. Ever.
The HTML file runs entirely in your browser's JavaScript engine. There is no backend, no API, no server connection of any kind. It physically cannot send data anywhere.
Every other Shopify calculator lives in the cloud — meaning your pricing, margins, and product costs are on someone else's server. This one is different. One file. Your computer. Your data.
Free · Runs in your browser · Nothing uploaded
Want your real Shopify net profit without sending your numbers to anyone? This runs entirely in your browser.
Shopify's dashboard shows gross revenue; it doesn't subtract the processing fee that comes off every sale. Enter your price, product cost, and shipping below and the calculator returns your net profit per sale after Shopify's fee — calculated locally, with nothing uploaded and no account needed. It works even with your Wi-Fi off. (Monthly plan fees, ad spend, and bulk order files are handled by the full offline tool.)
This free calculator shows your net profit per sale on one product. The full Shopify Profit Calculator compares all 5 plans side by side, models third-party gateways, runs your whole catalog via bulk CSV, and shows ROI, break-even, and a fee breakdown chart — 100% offline, one-time purchase, no subscription, no login.
Get the full Shopify Profit Calculator →The Difference
SaaS tools charge monthly fees for access to a server. This is a tool you own — no server, no subscription, no expiry date.
Data Privacy
Your product costs, selling prices, and margins are sensitive business information. Here's exactly how this tool handles them.
The HTML file runs entirely in your browser's JavaScript engine. There is no backend, no API, no server connection of any kind. It physically cannot send data anywhere.
Your preferred plan, payment method, and refund rate are saved in your browser's localStorage — on your device only. They persist between sessions without any server involved.
Open the source code in any text editor. Every calculation, every formula, every piece of logic is readable and auditable. No obfuscated code, no hidden network calls.
Google Fonts loads when you first open the file online. After that, fonts cache in your browser and the tool works completely offline. Your data is never involved in any network request.
What's Included
CC fee, transaction fee, refund cost, COGS, shipping, fulfillment, ad spend, and prorated plan cost — all itemized, all live. Covers Starter through Plus.
Drop in a spreadsheet of orders. Every row is processed through the full calculation engine. Export results as CSV with all calculated fields appended.
All 5 Shopify plans compared side-by-side for your current inputs. The most profitable plan is highlighted automatically with a Best For You badge.
Net profit margin %, ROI, break-even price per unit, and fee efficiency score — calculated live, displayed prominently, updated on every keystroke.
Default plan, payment method, refund rate, and currency symbol are saved in localStorage. Your settings are there every time you reopen the file.
Toggle between dark and light themes. Your preference is remembered. Numbers in DM Mono font, clean layout — designed for long work sessions.
Setup in 60 Seconds
You receive a single file: shopify-profit-calculator.html. Save it to your Desktop, Downloads folder, or anywhere on your computer.
Chrome, Firefox, Safari, Edge — all work. No installation, no setup wizard, no permissions required. The tool opens instantly.
Try it. The calculator runs entirely in your browser's JavaScript engine. After the fonts cache on first open, no internet connection is ever needed again.
Select your Shopify plan, enter price and COGS — results update live. No Calculate button. No form submission. No waiting.
Questions
Yes. After downloading and opening once (to cache fonts), the tool works completely offline. All calculations run in your browser — no internet connection is ever required.
One-time download. Pay once, use it forever. There is no renewal, no monthly fee, no account to maintain. You own the file permanently.
Yes. The tool runs locally in your browser. It cannot send data to any server — there is no server. Your prices, costs, and margins never leave your device.
All modern browsers: Chrome, Firefox, Safari, and Edge. Simply double-click the HTML file to open it. No plugins, extensions, or special settings required.
One file. No server. No subscription. Calculate your true Shopify profit — offline, forever.
This tool is provided as an informational aid to help Shopify merchants estimate profit margins and fee structures based on publicly available data. All results are calculations based on the inputs you provide and are intended for guidance purposes only. They do not constitute financial, accounting, or business advice. Fee structures and platform policies may change at any time; always verify current rates directly with Shopify and your payment provider. The user assumes full responsibility for all business decisions made based on or influenced by the outputs of this tool. Smart Local Tools accepts no liability for any loss, inaccuracy, or consequence arising from its use.