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Stock Reorder Calculator

Reviewed & updated by Updated Originally published

A Stock Reorder Calculator is an inventory planning tool that helps businesses determine when an item should be reordered and how much stock should be purchased. It uses current inventory, average daily usage, supplier lead time, and safety stock to calculate a practical reorder point.

How to Use the Stock Reorder Calculator?

Start by entering your business and warehouse details. Next, add each inventory item along with its SKU, supplier, current stock, average daily usage, lead time, safety stock, target stock level, and unit cost.

The calculator automatically determines the Reorder Point using:

Reorder Point = (Average Daily Usage × Lead Time) + Safety Stock

When the current stock reaches or falls below this level, the item is marked “Reorder Needed.” The calculator also determines a suggested reorder quantity based on the target stock level and calculates the estimated cost of replenishing the item.

Understanding the Results

The final summary shows how many inventory items require reordering, the total suggested reorder quantity, and estimated reorder cost. This makes it easier to identify low-stock items, plan upcoming purchases, and maintain sufficient inventory without manually performing the calculations.

Stock Reorder Calculator

Calculate when inventory should be reordered and estimate the quantity and cost required to replenish stock.
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Inventory Details
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Demand & Lead Time
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Reorder Calculation
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Review
LIVE STOCK REORDER SHEET

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