Raw materials stock period
Inventory
———– x 365
Purchases
W-I-P stock and finished goods stock period
Inventory
———– x 365
COGS
Cash operating cycle
Inventory conversion period
+ receivables collection period
- payables period
Round up to nearest whole day
Inventory conversion period
((WIP+FG)/2)
—————- x365
COGS
Working capital
Current assets - current liabilities