How to Compare Fresh, Frozen and Canned Food by Edible Cost

A fresh vegetable may have the lowest price per kilogram and still not be the cheapest food to eat.

A canned product may look expensive for its package weight, but part of that weight may be liquid you drain.

A frozen product may cost more per kilogram than fresh but require almost no peeling or trimming.

That is why I prefer to compare:

cost per edible amount

rather than package price alone.

The basic formula is:

For example, suppose fresh produce costs:

$3 for 1 kg

After trimming, only:

750 g

is used.

Edible cost:

Now suppose a frozen version costs:

$3.60 for 1 kg

and the whole kilogram is usable for your meals.

Frozen edible cost:

The frozen package has the higher shelf price.

But in this example it has the lower edible cost.

That is the distinction this article is built around.

USDA’s Food Buying Guide explicitly separates food As Purchased from the Edible Portion because the quantity bought and the quantity available for serving can differ. USDA also notes that vegetable yields vary according to the form in which the food is purchased.

Shelf unit price is only the first calculation

Start with:

NIST describes unit pricing as the cost per standard unit of measure, such as price per gram, ounce, or liter, and recommends it as a way to compare products and package sizes.

For example:

Fresh

1 kg for $3

$3/kg

Frozen

750 g for $2.70

Canned

400 g can for $1.20

By package weight:

Fresh: $3/kg

Frozen: $3.60/kg

Canned: $3/kg

It looks like fresh and canned tie.

But we have not calculated how much edible food each purchase provides.

The real comparison starts with usable quantity

Ask:

How much of this package actually becomes food I use?

For fresh food, you might remove:

• Stems
• Cores
• Outer leaves
• Peels
• Damaged portions

For canned food, you might drain:

• Water
• Brine
• Syrup
• Other packing liquid

For frozen food, the package may require little or no trimming, depending on the product.

USDA’s vegetable yield guidance confirms that yields differ according to purchase form and notes that frozen vegetables can provide more servings per pound than comparable fresh forms in some cases.

Calculate edible yield

Use:

To express it as a percentage:

Example:

Fresh broccoli purchased:

1,000 g

Usable for your meals:

700 g

Yield:

or:

70%

Your 1 kg purchase actually provides:

700 g edible food

for the way you prepare it.

Then calculate edible cost

Use:

Example:

Price:

$3

Edible amount:

700 g

Calculation:

$3 ÷ 700 × 100 ≈ $0.43

Real edible cost:

about $0.43 per 100 g

Compare that with the original shelf unit price:

$0.30 per 100 g purchased

That is a substantial difference.

Fresh food example

Suppose fresh cauliflower costs:

$4 for 1.2 kg

After removing leaves and portions you do not use:

Edible amount:

900 g

Shelf cost per 100 g:

Edible cost:

$4 ÷ 900 × 100 ≈ $0.44

The food effectively costs:

$0.44 per 100 g you use

rather than:

$0.33 per 100 g purchased

Frozen food example

Frozen cauliflower:

Package:

900 g

Price:

$3.80

Suppose all 900 g is usable for the intended meals.

Edible cost:

$3.80 ÷ 900 × 100 ≈ $0.42 per 100 g

Comparison:

Fresh:

$0.44 per edible 100 g

Frozen:

$0.42

In this hypothetical example, frozen is slightly cheaper despite having a higher-looking package price.

Canned food needs a drained-weight check

Canned food requires particular care because:

net package weight

may not equal:

the amount of solid food you actually use

USDA’s Food Buying Guide specifically includes drained weights or drained volumes for many canned fruits and vegetables when those amounts are relevant to the usable yield.

Suppose a can costs:

$1.50

Net weight:

400 g

Drained usable amount:

240 g

Shelf price using total can weight:

But edible solid cost:

That is a very different result.

Do not automatically use drained weight for every canned food

Sometimes the liquid is part of the food you actually use.

For example, depending on the recipe, you may use the entire contents of certain canned products rather than draining them.

In that situation:

usable quantity may equal the full contents

or be close to it.

USDA’s Food Buying Guide examples distinguish between canned products where the entire contents are used and those where drained amounts matter.

The correct question is:

What part of this product does my household actually use?

Use the form you actually eat

For canned vegetables:

If you drain them:

Use:

drained usable amount

If you use the liquid too:

Use:

total usable contents

Do not automatically compare:

fresh edible food

with:

canned food including liquid you throw away

That gives the canned option an artificial weight advantage.

A three-way comparison

Suppose you are comparing the same general vegetable.

Fresh

Price:

$3.00

Purchased:

1,000 g

Usable:

750 g

Edible cost:

Frozen

Price:

$3.30

Package:

900 g

Usable:

900 g

Edible cost:

$3.30 ÷ 900 × 100 ≈ $0.37

Canned

Price:

$1.50 per can

Net weight:

400 g

Drained usable amount:

240 g

Edible cost:

$1.50 ÷ 240 × 100 ≈ $0.63

In this example:

1. Frozen: $0.37
2. Fresh: $0.40
3. Canned: $0.63

The ranking is completely different from comparing package prices.

Compare the same amount

For an accurate comparison, convert all three options to:

cost per 100 g edible

or:

cost per kilogram edible

Do not compare:

Fresh:

$2.80/kg

Frozen:

$0.90 per 250 g

Canned:

$1.20 per can

Those units tell you almost nothing until they are standardized.

NIST’s unit-pricing guidance emphasizes consistent measurement units precisely because package size alone can obscure value comparisons.

Cost per edible kilogram formula

Use:

Example:

Price:

$5

Edible quantity:

800 g

Convert:

800 g = 0.8 kg

Then:

If another format costs:

$5.70 per edible kg

the second is cheaper for the same usable quantity.

You can also calculate the cost of the amount your recipe needs

Sometimes cost per 100 g is less useful than:

What will tonight’s recipe cost?

Suppose the recipe requires:

300 g usable vegetables

Fresh edible cost

$0.40 per 100 g

Recipe cost:

Frozen

$0.37 per 100 g

Recipe:

Canned

$0.63 per 100 g drained

Recipe:

Now the edible-cost calculation turns directly into meal cost.

Calculate how much you need to purchase

For fresh foods with trimming loss:

Example:

Recipe needs:

500 g edible food

Fresh yield:

80%

Calculation:

You need to purchase about:

625 g

to obtain:

500 g usable food

USDA demonstrates this exact type of calculation in its Food Buying Guide by dividing the edible amount required by the food’s yield factor to determine how much must be purchased.

Example using fresh apples

USDA provides an example in which fresh whole apples yield less ready-to-serve apple after coring and peeling. Its example calculates the purchase quantity by dividing the edible amount required by the yield factor.

That same idea works for household cost calculations:

If:

Fresh price = $2/kg

Edible yield = 78%

Then edible cost:

$2 ÷ 0.78 ≈ $2.56 per edible kg

You should compare:

$2.56 per edible kg

with the edible cost of the frozen or canned alternative.

Not:

$2 per purchased kg

against:

$2.40 per usable kg

A useful shortcut

If the purchase price is already expressed per kilogram:

Example:

Fresh:

$3/kg

Yield:

75%, or 0.75

Calculation:

That is a fast way to correct a shelf price for trimming loss.

Frozen food may have a high usable yield

Frozen vegetables are commonly sold already:

• Washed
• Cut
• Trimmed
• Ready to portion

USDA notes that frozen vegetables may yield more servings per pound than fresh vegetables because purchase form affects usable yield.

That does not mean frozen is always cheaper.

It means:

compare usable food, not raw package weight alone.

Frozen food has another cost advantage: portion flexibility

Suppose you need:

150 g vegetables

You can often take approximately 150 g from a larger frozen bag and leave the rest frozen for future meals.

That can reduce the pressure to use an entire fresh package immediately.

EPA recommends using the freezer to preserve food that will not be eaten in time and advises households to buy quantities they realistically expect to use.

This can affect your actual household cost, even when frozen food has a slightly higher shelf unit price.

Waste-adjusted edible cost

Edible yield and household food waste are not the same thing.

Imagine fresh vegetables:

Purchase:

1,000 g

After normal trimming:

800 g edible

But your household only eats:

600 g

The other:

200 g edible food

is eventually discarded.

Purchase price:

$4

Edible cost before household waste

Effective cost of food actually eaten

$4 ÷ 600 × 100 ≈ $0.67 per 100 g

The price increased from:

$0.50

to:

$0.67 per 100 g actually eaten

because some edible food never became a meal.

Frozen can win even with a higher edible unit price if fresh is repeatedly wasted

Suppose:

Fresh

$3

800 g edible

Planned edible cost:

$0.375 per 100 g

But only:

500 g

gets eaten.

Effective eaten cost:

Frozen

$4

800 g

All eventually used.

Effective cost:

Fresh looked cheaper initially.

Frozen ultimately delivered food your household actually ate for less money.

EPA states that buying only what you expect to use can save money and reduce wasted food.

Do not treat frozen leftovers as waste

Suppose you buy:

1 kg frozen vegetables

Use:

300 g this week

Remaining:

700 g

The remaining 700 g is not waste when it remains appropriately stored and usable.

Your current meal used only part of a larger inventory.

Do not calculate:

as though the remaining frozen food vanished.

Carry-forward inventory still has value.

Do the same for canned pantry inventory

Suppose cans are sold in a multipack.

Six cans:

$6

You use:

2

Current ingredient cost:

The other:

$4

remains pantry inventory.

Do not charge the entire multipack against this week’s meals.

Fresh produce is more likely to create a timing problem

Fresh food may still be an excellent value.

But the purchase has to fit:

• Your meal schedule
• Household size
• Package size
• Storage
• Realistic consumption

EPA recommends planning meals, checking existing refrigerator, freezer, and pantry inventory, and including quantities on shopping lists to avoid overbuying.

If you repeatedly discard part of the same fresh product, include that history in the next cost comparison.

Use your personal edible yield when practical

USDA yield data provide a useful reference, but your preparation habits can differ.

For example, one household might use:

• Broccoli stems
• Beet greens
• Potato skins
• Herb stems in cooking

Another may remove them.

That changes the household’s effective edible yield.

EPA specifically encourages using edible food parts that people sometimes discard when it is safe and appropriate, such as incorporating suitable scraps or greens into other dishes.

Your own measured yield can therefore be useful for foods you buy frequently.

Measure personal yield once

Suppose you buy:

1,200 g whole broccoli

After your normal trimming:

950 g

goes into meals.

Personal yield:

Save:

about 79%

for future planning.

Next time the store price is:

$4/kg

Estimated edible cost:

$4 ÷ 0.79 ≈ $5.06 per edible kg

No repeated weighing is necessary unless your preparation changes.

Do not assume fresh yield is always low

Some fresh products require very little removal.

If you use nearly the entire food, the fresh edible cost may stay close to its shelf unit price.

For example:

Price:

$2.50/kg

Household edible yield:

95%

Edible cost:

$2.50 ÷ 0.95 ≈ $2.63/kg

Only a small adjustment.

Yield matters most when a meaningful portion of the purchase is not used.

Do not assume frozen yield is always 100%

Some frozen products may contain components you do not use, or the cooking method may affect the quantity available for your recipe.

Use:

your actual usable amount

when precision matters.

The broader principle from USDA’s Food Buying Guide is that yield depends on the specific food and purchase form, so there is no universal yield percentage for all fresh, frozen, or canned products.

Canned products can vary dramatically in drained yield

One can may contain a high proportion of solid food.

Another may contain much more packing liquid.

Do not assume:

400 g can = 400 g edible solids

USDA’s Food Buying Guide provides drained weights for many canned fruits and vegetables because the usable amount can differ materially from total container weight.

The label or reliable product information can also help you determine the relevant net or drained amount.

Compare cans using the quantity you actually use

Suppose:

Can A

Price:

$1.20

Net:

400 g

Drained:

240 g

Edible cost:

Can B

Price:

$1.50

Net:

500 g

Drained:

350 g

Edible cost:

$1.50 ÷ 350 × 100 ≈ $0.43

Can B costs more at checkout.

But it gives you more drained food for the money.

Do not compare cans only by can size

A:

400 g can

B:

425 g can

The 425 g can may appear like better value.

But if drained solids are:

A:

300 g

B:

250 g

then the smaller can actually contains more of the food you intend to eat.

Use:

usable amount

rather than:

container headline weight

when the packing liquid is discarded.

Compare multipacks using edible amount

Suppose:

Four cans cost:

$6

Each produces:

250 g drained food

Total edible amount:

Edible cost:

$6/kg

Another brand:

Four cans:

$5.60

Each:

200 g drained

Total:

800 g

Edible cost:

The cheaper multipack has the higher edible cost.

Fresh versus frozen example with waste

Suppose you need vegetables for four meals.

Fresh option

Price:

$4

Edible after trimming:

800 g

You need:

600 g

Unfortunately 200 g is ultimately discarded.

Actual amount eaten:

600 g

Effective cost:

Frozen option

Price:

$4.50

Bag:

900 g

You use:

600 g

Remaining:

300 g stays frozen.

Consumed value at package unit cost:

The remaining:

$1.50

is future inventory.

No food has been wasted.

For this week’s meals:

Frozen ingredient value consumed:

$3

Fresh purchase ultimately cost:

$4 for the 600 g successfully eaten

The higher sticker price did not mean the frozen choice was more expensive in practical use.

Fresh can still be the better choice

Now change the situation.

Fresh:

$3 for 1 kg

Edible yield:

900 g

Household uses all 900 g

Effective cost:

Frozen:

$4 for 900 g

All usable

Cost:

$0.44

Fresh clearly wins.

There is no rule that:

fresh is cheaper

or:

frozen is cheaper

or:

canned is cheaper

The answer depends on:

price + usable yield + actual household use

Use this three-part formula

For each form calculate:

1. Usable quantity

Purchased quantity × usable yield

2. Edible unit cost

Price ÷ usable quantity

3. Effective eaten cost, if waste occurs

Price attributable to purchase ÷ quantity ultimately eaten

This gives you three levels of comparison.

A practical fresh versus frozen versus canned worksheet

Then add:

This separates theoretical edible value from what actually happens in your kitchen.

Compare convenience separately

Frozen or canned foods may reduce:

• Washing
• Peeling
• Chopping
• Cooking preparation

Fresh foods may offer other advantages for a particular recipe.

Do not hide convenience inside the edible-cost formula.

Instead compare:

Food cost

$

Preparation preference

Easy / moderate / more preparation

This prevents subjective convenience from being turned into a fake precise dollar figure.

Compare nutrition separately too

The lowest edible cost is not automatically the best nutritional choice for every situation.

Fresh, frozen, and canned products can also differ in:

• Added sodium
• Added sugars
• Sauces
• Ingredients
• Preparation
• Nutrient profile

If nutrition is part of your decision, compare the actual products rather than assuming every form is identical.

USDA FoodData Central provides nutrient-composition data for foods in different forms, including specific canned and processed entries, when you need a nutrition comparison.

Keep:

nutrition comparison

and:

edible-cost comparison

as related but separate questions.

Plain versus prepared products need a fair comparison

A frozen vegetable with sauce and a plain fresh vegetable are not exactly equivalent products.

Likewise:

Canned fruit in syrup

and:

Fresh fruit

may differ in more than purchase form.

For a clean price comparison, start with foods serving approximately the same meal function.

Then examine other differences separately.

Do not compare a ready-to-eat product with an ingredient as if they offer identical convenience

Suppose:

Fresh vegetables:

Require washing and chopping.

Frozen:

Already cut.

Canned:

Already cooked and ready to heat.

The edible-cost formula can still compare their grocery economics.

But your final purchase decision may include preparation convenience.

That is perfectly reasonable.

The important thing is to know which part of the decision comes from:

price

and which comes from:

convenience.

Account for cooking only where it changes the comparison materially

Suppose frozen food is sold ready to cook while a fresh version loses substantial weight during preparation.

If both eventually produce different cooked amounts, you can compare:

cost per cooked edible portion

instead of:

cost per raw edible gram

Use:

But keep the state consistent across all options.

Do not compare:

fresh raw weight

with:

frozen cooked weight

without accounting for the conversion.

Cost per serving can be easier than cost per gram

Suppose your household normally uses:

150 g vegetables per person

Fresh edible cost:

$0.40 per 100 g

Serving cost:

Frozen:

$0.36 per 100 g

Serving:

$0.54

Canned:

$0.50 per 100 g drained

Serving:

$0.75

This turns edible cost into an actual meal-planning number.

Family example

Four people use:

150 g each

Household vegetable requirement:

Fresh

Edible cost:

$0.40 per 100 g

Meal cost:

Frozen

$0.36

Meal:

$2.16

Canned

$0.50

Meal:

$3

Now you can compare the cost of putting that food on the family table.

Package sizes can change the winner

Suppose you only need:

300 g

Fresh

Sold loose.

You can buy approximately:

300 g edible equivalent after accounting for yield.

Frozen

900 g bag.

Canned

Two 250 g drained cans.

Even if frozen has the cheapest edible unit cost, you must spend enough cash to buy:

900 g

The remaining frozen food can still be useful inventory.

The correct decision depends on whether you want:

lowest long-run edible cost

or:

lowest immediate checkout spending.

Separate cash cost from consumption cost

Example:

Frozen bag:

$5

1 kg

You use:

250 g

Consumed ingredient value:

$1.25

But checkout cost:

$5

Both numbers matter.

The remaining:

$3.75

is frozen inventory when it remains usable.

Do not confuse:

money spent today

with:

food cost used today.

Sales can alter the comparison quickly

Fresh produce:

Regular:

$4/kg

Sale:

$2/kg

Frozen:

$3/kg edible

If fresh edible yield is:

80%

Regular fresh edible cost:

Sale edible cost:

The sale changes fresh from more expensive to cheaper.

Recalculate rather than relying on a permanent assumption.

But a sale does not justify buying too much fresh food

Suppose fresh food is very cheap this week but your household cannot use the quantity.

EPA notes that large-quantity deals only save money when the food is actually used before it spoils.

The useful calculation is:

sale edible cost + realistic usage

not sale price alone.

Seasonality may change fresh prices

Fresh-food prices can move more noticeably depending on:

• Season
• Region
• Availability
• Store promotions

So a comparison that favors frozen this month may favor fresh at another time.

Use the prices you actually face when making the purchase.

A simple price book can make these changes easier to see over time.

Store brand can change canned or frozen comparisons

Suppose:

Name-brand frozen:

$4.50/kg

Store-brand frozen:

$3.20/kg

Fresh:

$3.50 edible kg

The conclusion about:

fresh versus frozen

depends partly on which frozen product you chose.

Compare the actual products available to you, not broad categories in the abstract.

Do not overlook products already at home

Suppose your freezer already contains:

500 g vegetables

and tonight’s recipe needs:

300 g.

The grocery cost of buying another fresh product is not necessary for that meal.

EPA recommends checking your refrigerator, freezer, and pantry before shopping so food already available is used first.

Existing inventory should enter the decision before you purchase another version of the same food.

Your cheapest option may be the one already in the freezer

If frozen vegetables were purchased previously:

Use them.

Their original purchase cost still belongs to the meal’s ingredient cost.

But the cash required today is:

$0

That can be useful when working within a weekly grocery budget.

Use a “real edible cost” comparison

I recommend comparing five numbers.

1. Checkout price

How much cash does the package require?

2. Shelf unit price

Price per kg, 100 g, or other standardized unit.

3. Edible quantity

How much usable food do you get?

4. Edible unit cost

What does 100 g or 1 kg of usable food cost?

5. Expected actual use

Will the household eat it all?

Those five numbers give you a much clearer grocery decision than package price alone.

Example comparison table

Now fresh needs one more calculation because:

100 g edible food is expected to go unused.

If that actually happens:

Effective cost per 100 g eaten:

$3 ÷ 650 × 100 ≈ $0.46

Frozen remains:

$0.36

Canned:

$0.60

This produces a realistic household ranking.

When fresh often makes practical sense

Fresh can be especially attractive when:

• Price is competitive
• Edible yield is high
• You need the texture or form for the recipe
• You can buy an appropriate quantity
• Your household reliably uses it
• Little edible food is wasted

Do not penalize fresh automatically because some fresh foods require trimming.

Measure the product you actually buy.

When frozen often makes practical sense

Frozen can be especially useful when:

• You want to portion small quantities
• Plans change frequently
• Fresh versions are often wasted in your household
• The product is already trimmed or prepared
• You need flexible later-week inventory

USDA notes that frozen vegetables can provide higher serving yields per purchased pound than fresh forms in some cases, while EPA recommends freezing foods and using freezer inventory as part of food-waste prevention.

When canned often makes practical sense

Canned foods can be useful when:

• Pantry storage is valuable
• You need a ready-to-use ingredient
• The package size matches your meals
• Long-term inventory flexibility matters
• The edible cost is competitive after draining

But calculate using:

the amount you actually consume

rather than the can’s headline weight when packing liquid is discarded.

USDA’s Food Buying Guide specifically provides drained amounts for many canned products to account for this difference.

A reusable edible-cost worksheet

FRESH

Purchase price:

Purchase weight:

Edible weight after normal preparation:

Edible yield: %

Cost per 100 g edible:

Expected edible waste:

Amount ultimately eaten:

Effective cost per 100 g eaten:

FROZEN

Price:

Package weight:

Usable amount:

Cost per 100 g usable:

Amount used now:

Amount remaining frozen:

Expected waste:

CANNED

Price:

Net weight:

Drained weight, if relevant:

Amount of liquid actually used:

Total usable quantity:

Cost per 100 g usable:

Then compare

Choose based on the food your household will actually use.

The formulas worth saving

Edible yield

Edible quantity ÷ purchased quantity

Edible cost

Purchase price ÷ edible quantity

Cost per 100 g edible

Purchase price ÷ edible grams × 100

Purchase amount needed

Desired edible quantity ÷ edible yield

Effective cost after edible food waste

Purchase cost ÷ quantity ultimately eaten

Use the final formula only when remaining food has actually been lost, not when it remains usable inventory.

Common mistakes

Comparing only package prices

Different packages contain different quantities.

Comparing only shelf price per kilogram

Purchase weight may not equal edible weight.

Treating fresh trimming as if it does not exist

Account for meaningful preparation yield.

Assuming fresh always has more waste

Measure the actual product and your household habits.

Assuming frozen is always 100% usable

Use the actual usable quantity for the specific product.

Using total canned weight when the liquid is discarded

Use drained or otherwise usable quantity when appropriate. USDA provides drained weights for many canned fruits and vegetables for this reason.

Automatically draining every canned-food calculation

If the liquid is used in your recipe, it may be part of the usable food.

Comparing different units

Convert every option to the same edible measurement. NIST recommends consistent unit pricing for meaningful product comparisons.

Treating frozen inventory as waste

Food remaining appropriately frozen for future meals still has value.

Ignoring fresh food that repeatedly spoils

Actual household waste can increase effective edible cost.

Buying more because fresh produce is on sale

EPA notes that large-quantity purchases save money only when the food is actually used.

Comparing nutrition using price alone

Edible cost measures grocery economics, not the full nutritional profile.

Assuming all foods in one format have the same yield

USDA yield guidance is food-specific and shows that yield varies by product and purchase form.

Compare what reaches the plate, not what enters the cart

The simplest way to compare fresh, frozen, and canned foods is to stop asking:

Which package is cheapest?

Instead ask:

How much usable food does each package give me?

Start with:

Then:

For canned foods, use the drained amount when packing liquid is discarded.

For fresh foods, account for meaningful peeling, trimming, or preparation loss.

For frozen foods, calculate from the quantity that is actually usable for your meals.

USDA’s Food Buying Guide is built around this same distinction between food As Purchased and its Edible Portion, and it shows that yields vary according to both the food and its purchase form.

Then add one household-specific question:

Will we actually eat it?

A fresh vegetable costing:

$0.35 per edible 100 g

is not truly cheaper for your household if a substantial share repeatedly spoils.

A frozen bag costing:

$0.42 per 100 g

may work out better when you can use exactly what you need and leave the remainder as future freezer inventory.

EPA recommends planning purchases around what your household will actually use, checking existing food before shopping, including quantities on grocery lists, and using the freezer to prevent suitable food from going to waste.

So the useful comparison is:

Shelf price

→ usable yield

→ cost per edible amount

→ actual household use

Once you calculate those four steps, fresh, frozen, and canned foods can be compared on something much more meaningful than the number printed on the shelf label.