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Stock Reorder Calculator

Average daily usage describes how many units leave stock during normal work. Choose the same unit for consumption, stock on hand and the safety buffer.

How it works

Average daily usage describes how many units leave stock during normal work. Choose the same unit for consumption, stock on hand and the safety buffer.

Choose the right inputs

Lead time is the expected delay from placing an order to receiving usable supplies. Multiplying that delay by daily consumption estimates what will be needed while waiting.

Understand the output

Safety stock is added to expected lead-time demand to give the reorder point. At or below this level, the report flags that replenishment should be considered.

Use the result carefully

Days of cover divides current stock by daily usage. Zero consumption has no finite depletion date; seasonal demand spikes and uncertain delivery schedules need additional judgement.

Stock Reorder Calculator FAQs

Reorder point equals average daily use × lead time + safety stock. Demand variability is not modelled.
40 units per day × 3 days plus 100 safety units gives a reorder point of 220; stock of 150 is below that point.
Lead time is the expected delay from placing an order to receiving usable supplies. Multiplying that delay by daily consumption estimates what will be needed while waiting. 40 units per day × 3 days plus 100 safety units gives a reorder point of 220; stock of 150 is below that point.

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