Shopify ROI Calculator

A lead-generation tool built for a Shopify migration agency. Potential clients enter their current store metrics, and the calculator produces a personalized ROI report showing exactly why they should migrate to Shopify — with real numbers, not vague promises.

Example report

How it works

The math engine

The calculator measures the "conversion gap" between the client's current platform (WooCommerce, Magento, etc.) and projected Shopify performance:

• Revenue gain: Projects a 12–15% sales increase based on Shopify's lower checkout friction
• Cost savings: Factors in hosting, apps, and developer costs that disappear after migration
• Payback period: Tells the client exactly how many months until the migration pays for itself

The API

• POST /api/calculate — Validates input, runs the math, saves to database
• GET /api/report — Returns a permanent shareable link to a specific report dashboard
• GET /health — Server and database health check

Deduplication

If someone enters identical numbers twice, the system recognizes the existing report and returns it instead of creating duplicates.

UX details

• Split layout: Form on the left, Lottie animation on the right to keep engagement while the user fills fields
• Results sidebar: After calculation, the input area collapses into a sidebar so the focus shifts to graphs and numbers
• Live website preview: Automatically grabs a screenshot of the user's site so the report feels personalized
• Rotating Shopify partner badge: Builds trust immediately
• Share, print, copy link: One-click sharing for the client's team

Security

• File sandboxing — static assets are isolated, no access to server code
• Input sanitization — strict URL validation to block injection
• Rate limiting — API spam protection built in
• No raw IPs stored — everything hashed for privacy compliance