Inst. of Mfg.

Kanban Sizing

Calculate the exact number of Kanban cards needed to prevent stockouts.

Required Kanban Cards (Bins)

The Math

Kanban calculation ensures you have enough inventory to cover the lead time to replenish, plus a buffer.

Demand during Lead Time = Daily Demand × Lead Time Days

Safety Stock = Demand during Lead Time × (Safety Factor % / 100)

Cards = (Demand during Lead Time + Safety Stock) / Qty per Container (Rounded Up)