TenorOpsRestaurant & Kitchen Operations · Inventory & Par
Free Restaurant Inventory Turnover, DSI & Optimal Par Level Calculator
Calculate your kitchen's Inventory Turnover Ratio, Days Sales of Inventory (DSI), Reorder Point, and Optimal Par Level to prevent stockouts and spoilage.
Turnover & Par Level
Inventory & Ordering Inputs
Item Par Level Calculator
Inventory Results
Turnover Ratio & Par Level
Step-by-step guide
How to Use the Inventory Turnover & Par Level Calculator
- 1Enter period length, beginning/ending inventory, and COGS
Calculate your average inventory value, Turnover Ratio, and Days Sales of Inventory (DSI).
- 2Enter item weekly usage, delivery schedule, and safety buffer
Compute the exact Par Level and Reorder Point for any ingredient.
- 3Balance freshness against stockout risk
Target 4–6 turns per month (5–7 days on hand) for fresh restaurant inventory.
Formula & methodology
Inventory Turnover & Par Level Formulas
Average Inventory = (Beginning Inventory + Ending Inventory) ÷ 2 Inventory Turnover Ratio = Cost of Goods Sold (COGS) ÷ Average Inventory Days Sales of Inventory (DSI) = Period Days ÷ Inventory Turnover Ratio Optimal Par Level = (Weekly Usage ÷ Deliveries per Week) × (1 + Safety Buffer %)
Common questions
Frequently Asked Questions
What is an ideal inventory turnover ratio for a restaurant?
Fresh-food restaurants typically target 4 to 6 inventory turns per month (5 to 7.5 days of inventory on hand), equating to 48–72 turns per year.
What happens if inventory turnover is too low?
A turnover ratio under 3× per month means excess cash is tied up on walk-in shelves, increasing spoilage, freezer burn, and theft risk.
What safety buffer percentage should I use for Par Levels?
Use 20%–30% for high-volume staples with reliable twice-weekly delivery, and 35%–50% for specialty items with longer vendor lead times.
Keep optimizing
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