Analyze inventory velocity, coverage, and capital efficiency easily. Track turnover trends across demanding engineering operations. Turn complex stock data into faster, smarter operational decisions.
| Period | Opening Inventory | Closing Inventory | Average Inventory | COGS | Turnover Rate |
|---|---|---|---|---|---|
| Q1 | 120,000 | 150,000 | 135,000 | 210,000 | 1.56 |
| Q2 | 150,000 | 165,000 | 157,500 | 235,000 | 1.49 |
| Q3 | 165,000 | 175,000 | 170,000 | 240,000 | 1.41 |
| Q4 | 175,000 | 180,000 | 177,500 | 215,000 | 1.21 |
Annual turnover for the sample can also be checked using annual COGS divided by annual average inventory.
Average Inventory = (Opening Inventory + Closing Inventory) ÷ 2
Inventory Turnover Rate = Cost of Goods Sold ÷ Average Inventory
Days in Inventory = Period Days ÷ Inventory Turnover Rate
Weeks of Supply = Days in Inventory ÷ 7
Annual Carrying Cost = Average Inventory × Carrying Cost Rate
Gross Profit = Revenue − Cost of Goods Sold
GMROII = Gross Profit ÷ Average Inventory
Obsolete Share = Obsolete Inventory ÷ Average Inventory × 100
It measures how often inventory is consumed or sold during a selected period. Higher turnover usually signals faster material movement, lower idle stock, and tighter working capital use.
Engineering teams often manage expensive components, spares, and work-in-process items. Turnover helps reveal capital lockup, replenishment efficiency, and whether stock levels support production without overbuilding inventory.
A good rate depends on product complexity, lead time, demand stability, and service goals. Fast-moving consumables may justify higher turnover, while critical long-lead parts often need slower but safer inventory movement.
That usually means demand, procurement timing, or production scheduling changed significantly. In that situation, monthly averages or a manual average inventory value can give a more representative turnover result.
Carrying cost translates inventory volume into annual cost pressure. It helps connect stock policy with storage, insurance, capital, handling, and obsolescence burden.
GMROII means gross margin return on inventory investment. It shows how much gross profit is produced for each unit of average inventory held, making it useful for margin-sensitive operations.
Use cost of goods sold for the classic turnover formula. Purchases can distort results because bought material may not be consumed, shipped, or recognized in the same period.
Monthly values expose trend shifts that one annual ratio can hide. They help detect demand seasonality, slowdowns, overstock buildup, and process changes affecting inventory movement.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.