Start with usable yield, round purchases to packs and plan replenishment. Start with rental contracts, asset records and maintenance logs. Each example below uses hypothetical values you can replace.
Which calculator should you use?
| Tool | What it answers | What to check |
|---|---|---|
| Inventory Reorder Point | Estimate a replenishment trigger from entered usage and lead time. | The trigger says when to reorder. Purchase quantity also depends on supplier minimums, stock space, and demand variability. |
| Economic Order Quantity | Balance order frequency and stock holding under steady demand. | Assumes constant demand and lead time, no quantity discounts and no stockouts. Round to supplier pack sizes separately. |
These tools answer different questions and may use different units. Choose the tool that measures what you need; a larger result does not necessarily mean a better outcome.
Inventory Reorder Point
Estimate a replenishment trigger from entered usage and lead time.
Reorder point = daily usage × lead time + safety stock
Show example inputs and result
| Average daily item usage | 8 |
|---|---|
| Supplier lead time | 7 days |
| Safety stock | 20 items |
Result: 76 items.
The trigger says when to reorder. Purchase quantity also depends on supplier minimums, stock space, and demand variability.
Open inventory reorder pointEconomic Order Quantity
Balance order frequency and stock holding under steady demand.
EOQ = square root(2 × annual demand × ordering cost / annual unit holding cost)
Show example inputs and result
| Annual unit demand | 1,200 |
|---|---|
| Cost to place one order | 40 |
| Annual holding cost per unit | 6 |
Result: 126.4911 units per order.
Assumes constant demand and lead time, no quantity discounts and no stockouts. Round to supplier pack sizes separately.
Open economic order quantityUse the results in your plan
For a storage operator business, review facility overhead, vacancy, and service costs across the complete workflow. Use one consistent period and delivery unit: a unit rental. Compare the assumptions with recorded outcomes after delivery, then update the estimate.
Explore all relevant storage operator calculators