Reorder Level (ROL) Calculator
Calculate the optimal Reorder Point (ROP) for your inventory. Includes Safety Stock logic to prevent stockouts based on demand variability and lead time.
1. Consumption Data
2. Safety Stock Settings
About
In supply chain management, the Reorder Level (ROL) is the specific level of stock at which a new order must be placed to ensure that fresh inventory arrives exactly when the existing stock runs out. Placing orders too early ties up cash flow in excess warehousing; placing them too late causes stockouts, lost sales, and customer dissatisfaction.
This calculator is designed for logistics managers and retailers. It goes beyond the basic formula by incorporating Safety Stock, which accounts for real-world variability—such as supplier delays or sudden spikes in customer demand. By buffering against uncertainty, you maintain a high Service Level (typically 95-99%).
Formulas
The Reorder Level determines the trigger point for restocking:
If Safety Stock is unknown, it is calculated based on Service Level (Z) and Demand Deviation (σ):
Reference Data
| Product Category | Demand Variability (Std Dev) | Rec. Service Level | Z-Score Factor |
|---|---|---|---|
| FMCG (Groceries) | High | 98% - 99% | 2.05 - 2.33 |
| Apparel (Fashion) | Very High | 90% - 95% | 1.28 - 1.65 |
| Electronics (Flagship) | Medium | 95% | 1.65 |
| Electronics (Accessories) | Low | 90% | 1.28 |
| Pharma / Medical | Low (Critical) | 99.9% | 3.09 |
| Auto Parts | Medium | 95% | 1.65 |
| Furniture | Medium/High | 85% - 90% | 1.04 - 1.28 |
| Raw Materials | Low | 95% | 1.65 |