Kanban Quantity Calculator

Determine the number of kanban cards needed based on daily demand, lead time, safety stock, and container size.

Daily Demand

units

Lead Time

days

Safety Stock

Container Size

units

Tab to move between fields

Kanban Cards Needed

Total WIP Inventory1,200 units

Average Inventory600 units

Days of Supply2.4 days

Replenishments per Day10

How to Use This Calculator

Enter the average daily demand for the part in units.
Set the replenishment lead time in days from order to delivery.
Input the safety stock factor (typically 0.1-0.3) to buffer against demand variation.
Enter the standard container size in units.
Review the recommended number of kanban cards and total buffer inventory in units.

How the result changes with Daily Demand

Daily Demand: Average daily customer demand in units.
Lead Time: Time to replenish one container including production and transport.
Safety Stock: Safety stock percentage to buffer variability (typically 10-30%).
Container Size: Number of parts per kanban container or bin.

Identify Input Parameters
4 parameters
Daily Demand = 500, Lead Time = 2, Safety Stock = 20, Container Size = 50 = 4 input(s) provided
Calculate Kanban Cards Needed
Kanban Cards Needed
24 = 24
Calculate Total WIP Inventory
Total WIP Inventory
1200 = 1200
Calculate Average Inventory
Average Inventory
600 = 600

Engine last updated August 5, 2026. Checked against 2 independently-derived tests — how we verify calculators.

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