📦 Inventory Management Calculator

EOQ

Safety Stock

Reorder Point

Turnover

Annual Demand (units)

Ordering Cost ($ per order)

Holding Cost ($ per unit/year)

Economic Order Quantity: 0 units

Orders Per Year: 0

Total Inventory Cost: $0

EOQ is the ideal order quantity that minimizes total inventory costs (ordering + holding costs).

Tip: Consider rounding to practical order quantities based on supplier constraints.

Average Lead Time (days)

Maximum Lead Time (days)

Average Daily Usage (units)

Desired Service Level (%) 85% 90% 95% 98% 99%

Demand Standard Deviation (units/day)

Safety Stock (Basic): 0 units

Safety Stock (Advanced): 0 units

Basic Method: Accounts for lead time variability only.

Advanced Method: Accounts for both lead time and demand variability.

Safety stock protects against stockouts caused by unexpected demand or supplier delays.

Lead Time (days)

Average Daily Usage (units)

Safety Stock (units)

Reorder Point: 0 units

Lead Time Demand: 0 units

The reorder point is the inventory level at which you should place a new order.

Formula: (Lead Time Demand) + (Safety Stock)

This ensures stock arrives just as you're about to run out.

Cost of Goods Sold ($)

Average Inventory ($)

Time Period (days)

Inventory Turnover Ratio: 0.00

Days Sales of Inventory: 0 days

Turnover Ratio: How many times inventory is sold and replaced in a period.

Days Sales: Average days to sell current inventory.

Higher turnover is generally better, but varies by industry.