Sales velocity per variant
Track units-sold-per-week per variant. Shopify Analytics → Sales by variant. Or via Admin API.
Reorder point
Formula: Lead time (days) × Daily velocity. When inventory hits this, reorder.
Seasonality
Compare same-week last year. Adjust reorder point 30-60 days before peak season.
Apps
Stocky (Shopify's own for POS): free with POS Pro. Inventory Planner, Cin7: full ERP-level forecasting.
Frequently asked questions
How to forecast Shopify variant inventory?
Track sales velocity per variant + set reorder point = velocity × lead time.
Best forecasting app for Shopify?
Stocky (native for POS Pro), Inventory Planner, Cin7 Core.
How to handle seasonality in forecast?
Compare year-over-year weekly velocity. Adjust reorder point 30-60 days before peak.
Manual vs automated forecast?
Manual works up to 100 SKUs. Above, use app for automated reorder point calculations.
Does POD need forecasting?
No — POD has virtual inventory. Applies to physical stock only.
Multi-location forecast?
Yes — velocity per location, reorder to correct warehouse.
Low-stock alert setup?
Shopify Flow: variant inventory < threshold → email purchasing.
Inventory turnover metric?
COGS / average inventory value. Target 4-8× per year (varies by industry).
Related reading
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