Construction Material Reorder Point Calculator
Set an inventory threshold for reordering construction materials by combining average daily use, supplier lead time and an explicit safety-stock buffer.
Reorder-point inputs
Reorder recommendation
The reorder point formula
The standard planning relationship is straightforward when demand is represented by an average daily consumption rate.
Reorder point = lead-time demand + safety stock
Current headroom = current inventory − reorder point
Worked example
At 15 units per day and five days of supplier lead time, lead-time demand is 75 units. Adding 30 units safety stock produces a reorder point of 105 units.
What the recommendation means
If current inventory is below the reorder point, the modeled buffer is already being consumed and a new order should be evaluated. If inventory is above the point, the current stock still covers the modeled lead-time requirement plus safety stock.
Reorder point versus order quantity
The trigger and the purchase size answer different questions. A project might reorder at 105 units and purchase 120 units, for example.
Frequently Asked Questions
Is reorder point the same as minimum stock?
Not always. The meaning depends on the inventory policy used.
Can safety stock be zero?
Yes, if that is the chosen planning assumption.
Does order quantity change the reorder point?
No.
Can current stock be below the reorder point?
Yes; that indicates the threshold has already been reached.