Work out the exact stock level at which to reorder, so a delivery lands just as you would otherwise run out. Enter your numbers — nothing is stored.
Reorder point
90
Reorder when stock hits 90 units
Lead-time demand is 70 units (10 × 7 days), plus 20 safety stock. When your quantity on hand drops to the reorder point, place a purchase order — it should arrive just as you would otherwise run out.
Reorder point = (average daily sales × lead time) + safety stock.When your stock on hand falls to this number, it's time to place a purchase order. Set it right and stock arrives just as the shelf empties; set it too low and you stock out during the wait; too high and you tie up cash unnecessarily.
The full method, with worked examples for eBay and Shopify sellers, is in our reorder point guide. To work out the safety stock figure this calculator asks for, use the safety stock calculator.
A reorder point is only as good as the sales figure behind it — and if you sell on more than one channel, your true daily sales is the total across all of them. Salync tracks live sales across eBay, Shopify, Amazon and UK marketplaces from one catalogue, computes the reorder point on your combined demand, and alerts you the moment stock hits it. Free for up to 50 SKUs.
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Reorder point = (average daily sales × lead time in days) + safety stock. The first part covers demand while you wait for a delivery; safety stock is the buffer for demand spikes and late deliveries.
A simple method is (maximum daily sales × maximum lead time) − (average daily sales × average lead time). Our safety stock calculator does this for you, or you can enter a figure you already use.
Whenever your sales rate or supplier lead time changes materially — at minimum each season. A reorder point set on last quarter's sales will be wrong once demand shifts.
Yes. Inventory software that tracks live sales across eBay, Shopify, Amazon and other channels can compute a reorder point from your total demand and alert you the moment stock hits it — which is more reliable than checking manually.
Salync tracks stock across all your channels and alerts you the moment it's time to reorder.
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