Restaurant Inventory Turnover and Days on Hand: How to Calculate and Use Them

By Marji · Published September 29, 2026 · 7 min read

Inventory turnover is the food cost used in a period divided by average inventory value; days on hand is average inventory divided by average daily food cost. A kitchen that used $32,000 of food in a month and held $6,400 on average turned its stock 5 times, about 6 days on hand. Calculate both by category, not just in total.

The two numbers say the same thing in different units. Turnover tells you how many times the shelves were emptied and refilled; days on hand tells you how many days of cooking the shelves hold right now. Both measure the cash sitting in the walk-in and the time food spends waiting to be used — the time in which it can spoil, be over-portioned or go missing.

The formulas

Inventory turnover

Food cost used in the period ÷ average inventory value

Average inventory = (opening inventory + closing inventory) ÷ 2. Food cost used = opening inventory + purchases − closing inventory, the same period figure behind food cost percentage.

Days on hand

Average inventory value ÷ average daily food cost used

Equivalently, days in the period ÷ turnover. For stock on the shelf today, divide today's count value by average daily food cost.

These are the standard accounting ratios. OpenStax's Principles of Accounting defines inventory turnover as cost of goods sold divided by average inventory, and days' sales in inventory as average inventory divided by average daily cost of goods sold. It also names both failure modes: "Too little inventory means lost sales opportunities, whereas too much inventory means unproductive investment of resources as well as extra costs related to storage, care, and protection of the inventory."

Worked example: one month, one kitchen

Worked example · Hypothetical 30-day month, food only

Opening inventory, counted and valued: $6,100
Food purchases received: $32,600
Closing inventory, counted and valued: $6,700
Food cost used: 6,100 + 32,600 − 6,700: $32,000
Average inventory: (6,100 + 6,700) ÷ 2: $6,400
Turnover: 32,000 ÷ 6,400: 5.0 times
Days on hand: 6,400 ÷ (32,000 ÷ 30): 6.0 days

Use cost, not sales, in both ratios. Inventory is valued at cost, so dividing sales by inventory mixes two measures and makes turnover look faster than it is.

Split the numbers by category

A kitchen-wide six days can hide two days of produce and twelve days of dry goods. The categories behave differently — different shelf lives, different delivery schedules, different cost to hold — so the useful view is one row per category, each measured against its own delivery cycle.

The same hypothetical month split by category; days use a 30-day month
Category	Food cost used	Average inventory	Turns per month	Days on hand
Produce	$5,400	$360	15.0	2.0
Meat and seafood	$12,600	$1,680	7.5	4.0
Dairy and eggs	$3,900	$390	10.0	3.0
Dry goods and canned	$6,300	$2,520	2.5	12.0
Frozen	$3,800	$1,450	2.6	11.4
Total	$32,000	$6,400	5.0	6.0

Compare days on hand with the delivery cycle

When an item is ordered up to a par on a fixed schedule, stock runs from the par down toward the buffer and is then refilled. What a count should show therefore depends on when it is taken: just after a delivery, about one full cycle plus the buffer; the night before the next truck, about the buffer alone; mid-cycle, or averaged across the cycle, about half a cycle plus the buffer. Compare each category's days on hand with the figure for the point in the cycle when you counted.

Worked example · Meat and seafood, delivered twice a week, counted mid-cycle

Delivery cycle: 3.5 days
Half a cycle of usage: 1.75 days
Buffer (from the par calculation): 0.5 days
Expected at a mid-cycle count: 2.25 days
Actual, from the category table: 4.0 days
Average daily meat and seafood cost: $12,600 ÷ 30 = $420
Stock above what the schedule needs: 1.75 days ≈ $735

The comparison assumes steady daily use, accurate counts and counts taken at the same point in the cycle. If these counts had been taken just after the truck, 4.0 days would be exactly one cycle plus the buffer — a par set correctly. Check the timing before you cut anything.

With mid-cycle counts, the likely cause is pars set from habit rather than usage. The par level guide rebuilds them from counted usage and the days each order must cover. Dry goods at twelve days is a different story: long shelf life and a low cost to hold can make it a reasonable choice, especially when a case price rewards buying more. What matters is that it is a decision, not an accident.

What high and low numbers usually point to

Signals worth checking; none of them is a diagnosis on its own
Signal	Possible cause	What to check
Days on hand well above the delivery cycle	Pars copied from habit, bulk buys, slow-moving items	Rebuild pars from counted usage
Days on hand rising while sales are flat	Over-ordering, or stock that is spoiling rather than being used	Waste log and date-expired discards
Very fast turnover with frequent 86s	Pars too low, or late and short deliveries	Stockout dates against delivery records
Turnover jumps with no operational change	A change in how the count was valued, or a price move between counts	Valuation method and the prices used
One category drifts while the rest hold	A menu change, a new supplier pack or a portioning problem	The dishes using that category

FIFO means two different things

In the kitchen, FIFO is rotation. The FDA Food Code 2022 (Annex 4) describes first-in, first-out as "the first batch of product prepared and placed in storage should be the first one sold or used", and notes that the date marking the Code requires for refrigerated, ready-to-eat TCS food facilitates a FIFO procedure. Rotation is what keeps days on hand from turning into discards: new deliveries go behind older stock, and a house rule of dating every container makes the order visible.

In the books, FIFO is a cost assumption. IRS Publication 538 explains that the FIFO method assumes the items purchased first are the first used, so closing inventory is matched with the costs of the most recent purchases. It adds that when prices are rising, FIFO produces a lower cost of goods sold and a higher closing inventory than LIFO. If you value a count at each item's latest invoice price, you are close to FIFO's assumption. Which method you use for tax is a question for your accountant; for weekly food cost, the rule is consistency, because a change in valuation moves turnover and food cost without a single case changing.

Count so the numbers mean something

Count at the same point each period — after close on the same weekday is the easiest — and use the closing count as the next period's opening. The inventory count guide has the full procedure.
Count every storage area, and keep bar inventory separate from food so a slow wine list does not hide a fast walk-in.
Count in the unit you buy in, or one that converts exactly, and value each item at a consistent price basis.
Leave non-food supplies out of food inventory, or track them in their own category.
Record purchases by delivery date, so a delivery that arrives after the count is booked as next period's purchase rather than this period's usage.

Marji does not count inventory or calculate turnover; the count, the valuation and the period close stay in your own process. What Marji keeps is the accepted supplier price for each ingredient, which is the evidence a count valuation and a recipe cost both depend on. For the ordering side, the free par level calculator shows current days on hand for any item from its count and daily usage.

What is a good inventory turnover for a restaurant?

There is no single right figure; it depends on menu, storage and how often each supplier delivers. The better test is category by category: compare period-average days on hand with half a delivery cycle plus your buffer, or a shelf count taken just after a delivery with the full cycle plus the buffer, and ask whether the difference is a decision or an accident.

Should I use sales or food cost in the turnover formula?

Food cost. Inventory is valued at cost, so the numerator should be the cost of food used. Dividing sales by inventory multiplies turnover by sales ÷ food cost — 3.125 at a 32% food cost — so a kitchen that turns 5 times would appear to turn about 16.

Is days on hand the same as days of inventory?

Yes. Days on hand, days of inventory and days' sales in inventory all express inventory as days of usage at average daily cost. Use average inventory to describe a period, or today's count to describe the shelf right now.

How often should I calculate it?

At each period close you already count for food cost — weekly or monthly — and on the same basis every time. A single period is one reading; a trend over several is information.

Check days on hand for one item

Enter today's count, daily usage and delivery cycle for a single item. See its days on hand, its par and what to order.

Open the par level calculator