Reorder point
Know when to reorder, with a buffer for uncertainty.
InventoryTHE TOOLBOX
Inventory tools
Plan replenishment, cycle counts, stock coverage, carrying costs, Kanban loops, and demand forecasts with practical inventory calculators.
10 tools
Economic order quantity
Find the balance between ordering and holding costs.
InventoryNEW
Days of supply
See how long available stock covers expected demand.
InventoryNEW
Inventory carrying cost
Break annual inventory holding costs into clear components.
InventoryNEW
Kanban sizing
Size a pull loop with whole containers and an explicit buffer.
InventoryNEW
Min/max inventory
Calculate an order-up-to quantity with minimums and pack multiples.
InventoryNEW
Cycle count planner
Turn ABC count frequencies into annual workload and daily capacity.
InventoryNEW
Inventory aging & inactivity
Bucket inventory by receipt age and flag stock without recent movement.
InventoryNEW
Shelf-life / expiry planning
Allocate shared SKU demand across FEFO lots and identify expiry exposure.
InventoryNEW
Inventory projection / net requirements
Project dated stock balances and suggested replenishment from demand and receipts.
InventorySeparate a trigger from an order quantity
Reorder point estimates when a replenishment review is due; economic order quantity estimates a quantity under a simplified cost model. Min/max and Kanban use different replenishment policies. Days of supply is a stock snapshot, while a dated projection follows demand and receipts through time. Choose the question first rather than treating these outputs as interchangeable purchase instructions.
Protect the stock pool behind the number
Use one SKU, location, unit of measure, and planning period unless a tool explicitly supports a broader dataset. Reserved stock, backlog, late receipts, expiry, and quality holds can change what is actually available. ABC value classes help prioritize attention but do not establish clinical, safety, or operational criticality. Review demand quality and lead-time evidence before changing replenishment parameters or disposing of stock.