Kanban Card Calculator
Calculate the number of kanban cards needed for your pull system.
CurrentTarget
Kanban cards needed
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Max WIP in system
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Cards = (Demand × LeadTime × (1+Safety)) / Container size.
Values are calculated only in your browser; no data is stored.
About this metric
What is it?
The number of kanban cards that control flow in a pull system and cap the maximum WIP.
How is it calculated?
Cards = (Demand rate × Lead time × (1 + Safety)) / Container size per card.
How to interpret it?
Too few cards risk stock-outs, too many cause excess WIP; lead time is the most critical variable.
How to improve it?
Shorten lead time, reduce demand variability, optimize container size and safety factor.
Let's improve these numbers on the field
Measuring is the first step; lasting gains come from implementing together on the field.
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