Quick answer
How do you calculate egg cost per serving?
Divide the delivered case price by the number of plated servings the case really yields, after breakage, trim and overcooking. Then add the labor cost per serving: staff minutes per batch times the loaded wage, divided by servings. Run the same steps for shell, liquid and precooked eggs and compare the totals, not the case prices.
Cost per serving is the number that lets you compare a case of shell eggs, a carton of liquid egg and a case of precooked scrambled eggs on equal terms. Case prices cannot do that, because each format delivers a different number of servings and needs a different amount of work. Below: the formula, a worked example with invented numbers, and a worksheet. For every egg format side by side, see our guide to egg products for foodservice.
The egg cost per serving formula
Work in four steps, in this order.
- Fix the plated portion. Decide what one serving looks like on the plate, for example a 3 oz scoop of scrambled eggs or two fried eggs. Every format is measured against that portion.
- Find the servings per case. For shell eggs, count eggs per serving. For liquid and precooked eggs, divide the net weight per case by the weight per serving.
- Correct for waste. Divide by your usable yield (for example 0.97 if 3 percent is lost to breakage, spills or overcooked batches).
- Add labor. Staff minutes per batch divided by 60, times the hourly wage plus benefits, divided by servings per batch.
Egg cost per serving = (case price / servings per case / usable yield) + labor per serving
Step 1 and 2: portion and servings per case
The portion is where comparisons go wrong. A two-egg scramble from shell eggs, 3.5 oz of liquid egg and a 3 oz scoop of precooked eggs may not look the same on the plate. Run a yield test: cook each format to your standard, weigh what comes off the griddle or out of the pan, and set the portion so the plates match. Our shell egg to liquid egg conversion chart gives starting equivalents; your own test decides.
Use the pack on the case label. For example, Echo Lake's precooked scrambled eggs come in 20 lb bulk packs. At a 3 oz portion, 20 lb (320 oz) gives 320 / 3 = about 106 servings before waste. Counted products are simpler: a case of 162 one-ounce scrambled egg patties is 162 pieces.
Step 3: correct for waste
Every format loses something: cracked eggs and overcooked batches on the shell egg line, liquid left in cartons or past its date after opening, precooked pieces overheated or held too long.
Measure waste for a week: weigh what goes in the bin and divide by what you started with.
Step 4: add labor
Labor per serving is often the deciding number. Time the whole job: cracking, mixing, cooking, temping, holding, portioning and cleanup, then divide by the servings in that batch.
Use the loaded wage (pay plus payroll taxes and benefits), because that is what an hour costs you. If precooked eggs free a cook to do other work rather than cutting hours, say so in your notes; the saving is real only if the time is used.
Worked example (hypothetical numbers)
Every price, yield and time below is invented to show the arithmetic. None is a market price or an Echo Lake price. The portion is a 3 oz plated scramble; batches are 100 servings; the loaded wage is $20.00 per hour.
| Step | Shell eggs | Liquid whole egg | Precooked scrambled |
|---|---|---|---|
| Case price (hypothetical) | $45.00 per 30 dozen (360 eggs) | $30.00 per 15 lb (240 oz) | $70.00 per 20 lb (320 oz) |
| Amount per serving (from yield test) | 2 eggs | 3.5 oz | 3 oz |
| Servings per case | 360 / 2 = 180 | 240 / 3.5 = 68.6 | 320 / 3 = 106.7 |
| Egg cost per serving before waste | $45.00 / 180 = $0.250 | $30.00 / 68.6 = $0.437 | $70.00 / 106.7 = $0.656 |
| Usable yield | 0.96 | 0.98 | 0.99 |
| Egg cost after waste | $0.250 / 0.96 = $0.260 | $0.437 / 0.98 = $0.446 | $0.656 / 0.99 = $0.663 |
| Staff minutes per 100 servings | 45 | 25 | 10 |
| Labor per serving | 45 / 60 x $20 / 100 = $0.150 | 25 / 60 x $20 / 100 = $0.083 | 10 / 60 x $20 / 100 = $0.033 |
| Egg cost per serving total | $0.41 | $0.53 | $0.70 |
In this example shell eggs cost least per plate. Change one input, such as a higher wage, a smaller crew or more waste on the shell egg line, and the order can change. Run it with your own numbers.
What the table leaves out
Some costs do not fit a per-serving line but still belong in the decision:
- Equipment and energy: griddle time versus oven or steamer time.
- Food safety steps: pooling, temping and the rules on raw eggs; see when the Food Code requires pasteurized eggs.
- Sourcing claims: a cage-free egg products requirement raises the case price for every format.
- Documentation: inspection and supplier records, covered in what USDA inspected egg products means for buyers.
Keep the numbers current
Egg prices move fast, so a cost per serving calculated last quarter may already be wrong. USDA's Economic Research Service reported on October 23, 2026 that retail egg prices in September 2026 were 20.6 percent lower than a year earlier, and it forecast a 29.3 percent decrease for 2026 (USDA ERS Food Price Outlook). Retail figures are not your contract price, but they show the market's direction.
Recalculate whenever your case price changes. For ways to soften price swings, see egg prices for restaurants.
A blank worksheet
Copy this table and fill in one column per format. The example column shows the arithmetic only.
| Line | Formula | Example (hypothetical) |
|---|---|---|
| A. Case price | From invoice, delivered | $45.00 |
| B. Servings per case | Units or oz per case / amount per serving | 180 |
| C. Usable yield | 1 minus waste share | 0.96 |
| D. Egg cost per serving | A / B / C | $0.260 |
| E. Labor per serving | Minutes / 60 x wage / servings | $0.150 |
| F. Cost per serving total | D + E | $0.41 |
Using the result
The cheapest format is not always the right one. A format that costs more per plate can still win if it frees a cook, holds better on a buffet or cuts complaints. Weigh those factors in our precooked eggs vs shell eggs comparison, and read the honest pros and cons of precooked egg patties if you serve sandwiches. School buyers compare on cost per oz eq instead, as shown in precooked egg patties vs scrambled eggs for school breakfast.
FAQ
How much does one egg cost a restaurant?
Divide your delivered case price by the eggs in the case. A 30-dozen case holds 360 eggs, so a $45.00 case (hypothetical) is $0.125 per egg. Then correct for breakage and add labor to get the real cost of each egg you serve.
How do you calculate food cost for a breakfast plate?
Add the cost per serving of each component (eggs, protein, potatoes, toast, garnish) using the same method: price per unit, divided by servings, corrected for waste. Divide the plate cost by the menu price to get the food cost percentage.
Is liquid egg cheaper than shell eggs?
Sometimes. Liquid egg often costs more per ounce than shell eggs but needs less labor and wastes less. Compare both on cost per serving with labor included, using your own prices and a yield test, before switching.
Should labor be included in cost per serving?
Yes, when you compare formats. Food cost alone favors shell eggs; labor is where liquid and precooked eggs recover their price. Leave labor out only when the staff time is fixed and would not change with the format.
How often should I recalculate cost per serving?
Every time your case price changes, and at least monthly when egg markets are volatile. Re-run the yield test when you change suppliers, item codes or cooking method.
Next step
Plug your own invoices into the worksheet, then compare formats with Echo Lake precooked scrambled eggs and request a spec sheet or sample from Echo Lake Foods.
