Guides
Inventory planning, explained by a practitioner.
No fluff, no upsells. Just the math, the logic, and the decisions that matter for Shopify stores managing their own inventory.
How to Forecast Demand for New Products Without Sales History
Every inventory formula assumes you have 90 days of clean sales data. For new launches, you have zero. Here is how to handle the cold-start problem without guessing.
Read guideHow to Calculate Economic Order Quantity for Your Shopify Store
You know when to reorder (reorder point) and how much buffer to carry (safety stock). The remaining question is how many units to order each time. Economic Order Quantity is the formula that answers it.
Read guideHow to Calculate Reorder Points for Your Shopify Store
The reorder point is the single most actionable number in inventory planning. It tells you exactly when to place a new order for every SKU. Here is the formula, a worked example, and the weekly workflow that makes it practical.
Read guideWhy Inventory Apps Charge by Order Volume (And Why That Makes No Sense)
Most Shopify inventory apps tie their pricing to your sales order volume. That pricing model has nothing to do with how inventory planning actually works. Here is why, and what it means for your wallet.
Read guideHow to Calculate Safety Stock for Your Shopify Store
Safety stock is the single most important number in inventory planning, and most Shopify apps either skip it or oversimplify it. Here is the actual formula, why it matters, and how to set it for every SKU in your store.
Read guideStocky Is Shutting Down (Aug 31, 2026): What It Actually Did and What You Actually Need
Shopify is retiring Stocky on August 31, 2026. Before you commit to $99–$250 a month for a replacement, understand what Stocky's forecasting actually calculated — and the no-subscription alternative for stores under 500 SKUs.
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