Free Resources
Free Shopify Tools
Calculators and analyzers built for Shopify store owners. No account required — run a quick analysis and see what your catalog is hiding.
Dead Inventory Calculator
Enter your average product cost, units on hand, and days without a sale to see exactly how much capital is locked in inventory that isn't moving.
Variant Performance Analyzer
Paste in your variant sales data to see which size, color, or style options are dragging your catalog down — and which ones you should double down on.
Cannibalization Score
Input weekly sales figures for two products to get a Pearson correlation score. A strong negative correlation means they're stealing sales from each other.
Catalog Health Estimator
Answer five quick questions about your store — dead product percentage, missing images, duplicate count — and get an estimated shelf health score from 0–100.
Inventory Turnover Calculator
Calculate your inventory turnover ratio and see how it compares to Shopify benchmarks for your product category. Know if your stock is moving fast enough.
SKU Rationalization Tool
Input your SKU count, revenue per SKU, and carrying cost to calculate which SKUs are worth keeping. Outputs a complexity score and cut recommendation.
Stockout Risk Calculator
Enter your average daily sales velocity and current stock level to calculate days of supply remaining and your stockout risk rating.
Want these insights for your entire catalog?
ShelfMerge connects to your Shopify store and runs all five analysis engines automatically — dead inventory, variant performance, cannibalization, duplicates, and health score.
Free plan available. No credit card required.