Reorder Level Formula:
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The reorder level is the inventory level at which a new order should be placed to replenish stock before it runs out. It's calculated based on average daily demand and lead time.
The calculator uses the reorder level formula:
Where:
Explanation: The formula ensures you have enough inventory to cover demand during the lead time period.
Details: Proper reorder level calculation prevents stockouts (which can disrupt operations) while avoiding excessive inventory (which ties up capital).
Tips: Enter average daily demand in units/day and lead time in days. Both values must be positive numbers.
Q1: Should I include safety stock in reorder level?
A: This calculator gives the basic reorder level. For safety stock, add your desired buffer to the calculated reorder level.
Q2: How often should I recalculate reorder level?
A: Whenever demand patterns or lead times change significantly, typically quarterly or when you notice changes.
Q3: What if my demand is seasonal?
A: For seasonal items, calculate separate reorder levels for different seasons based on their specific demand patterns.
Q4: How does this differ from Economic Order Quantity (EOQ)?
A: Reorder level tells WHEN to order, while EOQ tells HOW MUCH to order to minimize total inventory costs.
Q5: What if my lead time varies?
A: Use the maximum expected lead time or calculate a weighted average lead time for more accuracy.