Free Resources
Online calculators and tools to help you manage inventory smarter. No signup required.
Generate Code 128 barcodes and QR codes in bulk — print label sheets or download PNGs, free.
Calculate cost of goods sold, gross profit, and gross margin for any period.
Convert between markup and margin, or find a selling price from cost.
Calculate turnover ratio and days-to-sell from COGS and average inventory.
Find when to reorder based on lead time, daily demand, and safety stock.
Find the order quantity that minimizes combined ordering and holding costs.
Size your buffer against demand spikes and late deliveries — and see the reorder point it implies.
StockZip inventory management calculates reorder points, tracks stock levels, and alerts you when it is time to order. Start free, upgrade when you are ready.