Inventory and operations calculators

CalculatorStockout Date CalculatorFind the date you'll run out of stock, your weeks of supply and the last day to reorder, from your recent sales.

CalculatorReorder Point CalculatorFind the stock level that should trigger your next purchase order, built from how fast you sell and how much your lead time actually varies.

CalculatorSafety Stock CalculatorSet safety stock from a target service level, using how much your daily sales and lead time actually vary, not just a fixed cushion.

CalculatorEOQ CalculatorFind the order quantity that minimizes ordering cost and holding cost combined, using the classic economic order quantity formula.

CalculatorInventory Turnover CalculatorSee how many times you sold through your average inventory in a period, and how many days stock typically sits before it sells.

CalculatorSell-Through Rate CalculatorFind what share of the stock you had available actually sold, in retail mode (units received) or reseller mode (stock on hand plus received).

CalculatorOpen-to-Buy CalculatorWork out how much buying budget you have left for a period, at retail and at cost, before you overbuy against your sales plan.

CalculatorGMROI CalculatorPaste a list of SKUs with gross margin and average inventory cost, and see gross margin return on inventory for each one, ranked.

CalculatorInventory Carrying Cost CalculatorBreak down what it actually costs to hold your inventory for a year: capital, storage, shrinkage, insurance and obsolescence.

CalculatorCOGS CalculatorWork out cost of goods sold for a period from beginning inventory, purchases, freight in and ending inventory, set up for online stores.

CSV toolInventory Forecast ToolUpload a sales history CSV and get a simple seasonal forecast and suggested reorder quantity per SKU, right in your browser.

CalculatorWarehouse Space CalculatorEstimate pallet positions and floor area from your SKU count, rack height and aisle layout, as a rough space plan.