Whole vs Crushed vs Diced Canned Tomatoes: Which to Make

You’re at a U-pick farm in late August. You’ve got 25 kg of tomatoes in the car. Now what?

This is the decision guide for which style to can. All four — whole, crushed, diced, sauce — are Bernardin-tested, water-bath safe with the lemon juice rule, and shelf-stable for a year. They differ in prep time, equipment, and what you can do with them in February.

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The 30-second decision

Want	Make	Why
Most versatile canned product (can be crushed or diced later in the pan)	Whole peeled tomatoes	Most reach. Texture decision deferred to cooking day.
Fastest method, chunky texture for soup/chili	Crushed tomatoes	Easiest for beginners. Goes everywhere a “can of crushed tomatoes” goes in a recipe.
Quick recipes where tomato chunks matter	Diced tomatoes	Stir into pan, ready to use. Slightly more prep.
Pasta base, pizza sauce, soup base, braise liquid	Strained sauce	Smooth + reduced. See our sauce post.
Don’t want to use a canner this year	Freeze them whole	See freezing pillar. No acidification needed.

Side-by-side comparison

For about 5 kg of paste tomatoes (a manageable single batch):

	Whole	Crushed	Diced	Sauce
Jars yield (500 mL)	4–5	5–7	5–6	3–4
Active prep time	60 min	45 min	75 min	30 min
Passive cook time	0	5 min	0	60–120 min
Special equipment	None	None	None	Food mill or strainer
Texture in the jar	Whole + chunks of pulp	Loose chunks + free juice	Diced cubes + light juice	Smooth, thick
Process time (500 mL, sea level, ref. only)	~40 min	~35 min	~40 min	~35 min
Process time (1 L, sea level, ref. only)	~45 min	~45 min	~45 min	~45 min
Headspace	1.25 cm (½ inch)	1.25 cm (½ inch)	1.25 cm (½ inch)	2 cm (¾ inch)
Acidification per 500 mL jar	1 tbsp bottled lemon juice	1 tbsp	1 tbsp	1 tbsp
Best for	Generalist pantry stock	Soups, stews, chili	Quick pan recipes	Pasta, pizza, soup base

Processing times shown are reference points only. Open your Bernardin edition for the exact number for your style + jar size + altitude band. See our altitude-adjustments guide for the band system.

Whole peeled tomatoes

The “most versatile” jar in your pantry. You can crush them by hand at the stove for crushed-tomato applications, dice them with a knife for diced applications, or strain through a mill for instant sauce. Costs you one extra step in cooking but gives you all the options.

Method (high-level):

1. Score the bottom of each tomato with a small X
2. Blanch in boiling water 30–60 seconds; ice bath
3. Slip skins; remove cores
4. Hot-pack: simmer the peeled tomatoes in their own juice for 5 minutes
5. Pack jars with whole tomatoes (gently — don’t crush them)
6. Fill with hot tomato juice from the simmer pot, leaving 1.25 cm headspace
7. Add 1 tbsp bottled lemon juice per 500 mL jar (2 tbsp per 1 L) before filling
8. Process per Bernardin’s whole-tomato recipe for your jar size + altitude

Best for: households that cook with tomatoes flexibly. Italian-leaning kitchens (whole tomatoes are the Italian standard).

Tip: smaller tomatoes pack more densely than large ones. Roma, plum, San Marzano are ideal. Beefsteaks tend to break apart during packing.

Crushed tomatoes

The easiest style for a first-time canner. Forgiving — you don’t have to keep the tomatoes intact.

Method (high-level):

1. Score, blanch, peel as for whole
2. Quarter or roughly chop
3. Hot-pack: add quartered tomatoes to a pot in batches; simmer for 5 minutes while mashing with a potato masher
4. The point is to break the tomatoes down enough to release juice — texture stays chunky
5. Add 1 tbsp bottled lemon juice per 500 mL jar (2 tbsp per 1 L) before filling
6. Ladle hot crushed mixture into jars, leaving 1.25 cm headspace
7. Process per Bernardin’s crushed-tomato recipe for your jar size + altitude

Best for: chili, beef stew, vegetable soup, “needs a can of tomatoes” recipes. The go-to default.

Yield bonus: crushed yields slightly more jars per kg than whole because less air space.

See the full tomato canning post for the step-by-step on whole and crushed.

Diced tomatoes

The version most Canadians know from grocery store cans. Cubes of tomato in light juice, ready to dump into a pan.

Method (high-level):

1. Score, blanch, peel as for whole
2. Core and dice into 1–2 cm cubes
3. Hot-pack: simmer the diced tomatoes in their juice 5 minutes (some recipes skip the cook step and raw-pack — follow Bernardin’s exact recipe)
4. Add 1 tbsp bottled lemon juice per 500 mL jar (2 tbsp per 1 L) before filling
5. Pack jars with diced tomatoes + their juice, leaving 1.25 cm headspace
6. Process per Bernardin’s diced-tomato recipe for your jar size + altitude

Best for: pan-ready use — chili, shakshuka, taco fillings, curry bases. When you want the tomato pieces visible in the finished dish.

Trade-off: dicing is fiddly and time-consuming. If you’re not specifically chasing the “cubes in juice” texture, crushed is faster.

Strained sauce

Smooth, reduced, no skins or seeds. The most equipment-intensive style — needs a food mill, Victorio strainer, or fine-mesh sieve.

See our full tomato sauce post for the method.

Best for: pasta sauce base, pizza sauce, soup base, braise liquid, shakshuka base when you want it smooth.

Trade-off: highest equipment bar; longest passive time (60–120 minutes of reduction). Lowest yield per kg of raw tomatoes (you lose volume to skins, seeds, and reduction).

The constant: acidification

Every style above uses the same lemon-juice rule:

• 500 mL jar: 1 tbsp bottled lemon juice (or ¼ tsp citric acid)
• 1 L jar: 2 tbsp bottled lemon juice (or ½ tsp citric acid)

Added to each empty jar before filling. Every jar. Every batch. This is Bernardin’s and Health Canada’s universal tomato canning rule because modern tomato varieties sit right on the pH 4.6 threshold that separates water-bath-safe from unsafe. The acidification guarantees the pH every time.

Bottled lemon juice only — fresh varies too much from one lemon to the next.

This is also the rule that does not change if you add other ingredients. Add an onion, add a pepper, add meat — the lemon juice isn’t enough to push the pH safely below 4.6 anymore. Those mixed recipes go to pressure canning territory, not water-bath. See the pH rule article for why.

Yield math: how much to grow or buy

Per 5 kg of paste tomatoes (a typical single canning batch):

Style	500 mL jars yielded
Whole	4–5
Crushed	5–7
Diced	5–6
Sauce (after reduction)	3–4

For a 2-person household using tomato products weekly (~52 jars per year):

• Buy or grow ~25–30 kg of paste tomatoes (one full bushel from a U-pick farm)
• Plan 4–6 canning sessions of 5 kg each
• Suggested mix: 40% crushed, 30% diced, 20% sauce, 10% whole

For a 4-person household: double everything.

When to make this

Late August through late September in Canada:

• Field tomatoes peak Labour Day weekend
• U-pick farms run $1–2/kg
• Grocery store paste-tomato prices drop in early September
• Plan multiple canning weekends — one bushel takes 2–3 sessions to process

Common mistakes

• Mixing styles in one canning batch. Different processing times. Run separate batches.
• Skipping the lemon juice on plain tomatoes. Don’t.
• Adding onions/garlic/herbs to canned tomato products. Pasta-sauce territory; pressure canner only.
• Slicing tomatoes (beefsteaks, heirlooms) with the same yield expectations as paste tomatoes. Slicers yield 30–40% less. Use them anyway if that’s what you have; plan a longer simmer for sauce.
• Reusing SNAP lids. Single-use only.
• Cooling jars in a cold kitchen / on a cold counter. Thermal shock can crack jars. Use a towel-lined counter at room temperature.

Decision tree (short version)

• Never canned before? → Crushed
• Want maximum future flexibility? → Whole
• Cooking quick pan recipes all winter? → Diced
• Need a smooth sauce base? → Sauce (the sauce post)
• Don’t own a canner? → Freeze whole (the freezing pillar)

Next steps

• How to can tomatoes (whole + crushed) — the founding method post.
• Tomato sauce — the strained, reduced version.
• The pH rule — why you can’t add onions or meat to canned tomato.
• Salsa — the structured exception with Bernardin’s tested ratios.
• Altitude adjustments — for the processing-time math.