Students stocking a shared kitchen
Chopped tomatoes can go into pasta sauces, chilli and other cupboard meals. If several people will use them, compare multipack quantities with the space available.
Who is this for?
Students comparing salt on food labels
Use the declared salt per 100g to compare tomato bases, then consider the other ingredients you will add to the meal. The NHS suggests herbs, spices, garlic, chilli or lemon as ways to add flavour without routinely adding salt.
People cooking one portion at a time
ASDA suggests two servings from its 400g tin. If you will use only part of a tin, plan another meal and follow that product's instructions for transferring and refrigerating the leftovers.
What should you check?
Start with the salt declaration on comparable packs, then choose a quantity and opened-tin routine that fit how you cook.
| Priority | What to check | Your needs |
|---|---|---|
| Salt per 100g | Compare the current labels on the exact products. ASDA lists 0.01g, M&S 0.02g, Tesco 0.09g, Napolina 0.10g and Mutti Polpa 0.30g salt per 100g for the selected products. | I want to know how much salt the tomato base contributes before adding stock, cheese or sauce. |
| Label wording | Read the nutrition panel and any claim on the tin separately. A lower figure than another product does not mean the tomatoes contain no salt. | A phrase such as 'reduced salt' should not replace a comparison of the amounts on the packs I might buy. |
| Ingredients and texture | Check the ingredients when switching from plain to flavoured tomatoes. Napolina describes its chopped tomatoes as chunky; Mutti describes Polpa as finely chopped and lists salt among its ingredients. | For sauce, I may want control over seasoning, or I may prefer a particular tomato texture. |
| Pack quantity | Compare a single 400g tin with a multipack against cupboard space and how often you cook with tomatoes. | A shared kitchen could use several tins, but I may only have room or plans for one. |
| Opened-tin storage | Follow the pack's transfer, refrigeration and use instructions. ASDA says to use its refrigerated leftovers within four days; M&S says within three days. | If I cook for one, I need a plan for the remainder rather than leaving it in the opened tin. |
Common buying mistakes
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Assuming plain chopped tomatoes have the same salt content
The selected ASDA and Mutti products declare 0.01g and 0.30g salt per 100g respectively, so the tomato base can make a different contribution to a recipe.
Compare the per-100g figures on the exact tins, then account for ingredients such as stock, cheese and prepared sauces.
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Reading 'reduced salt' as 'salt-free'
A comparison with another tin does not establish that a product contains no salt.
Read the precise wording of any claim and use the declared salt per 100g for your comparison.
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Assuming every variant of a brand has the same ingredients
Choosing a flavoured version changes the product you are comparing with a plain tin.
Recheck both the ingredients and nutrition panel whenever you change variants; add your own herbs or spices if you want to control the seasoning.
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Leaving half a tin without a plan
ASDA suggests two servings from its 400g tin, while ASDA and M&S give different periods for using refrigerated leftovers after opening.
Plan another meal or share the tin. Transfer any unused tomatoes to a suitable non-metallic container and follow the instructions on that pack.
Brand and product references
These figures refer to the named products, not every tomato tin made by each brand; check the label of the variant you choose.
ASDA
ASDA Chopped Tomatoes 400g is a plain chopped-tomato option for sauces and cupboard meals.
- ASDA declares 0.01g salt per 100g and suggests two servings per tin.
- Its instructions say to transfer, refrigerate and use opened contents within four days; check the current pack label.
M&S
M&S Chopped Italian Tomatoes 400g provides another plain option to compare by its declared salt figure.
- M&S declares 0.02g salt per 100g for this product.
- Its instructions say to transfer and refrigerate leftovers and eat them within three days.
Tesco
Tesco Italian Chopped Tomatoes 4 x 400g is a multipack to consider when several tins suit your cooking plans.
- Tesco lists tomatoes, concentrated tomato juice and citric acid, with 0.09g salt per 100g.
- That declared salt figure is above the selected ASDA and M&S products; check the current multipack label.
Napolina
Napolina describes its chopped tomatoes as chunky, a texture to consider for thicker sauces.
- Napolina states 0.10g salt per 100g for its chopped tomatoes.
- The chunky texture is the brand's description, not an independent comparison with the other tins.
Mutti
Mutti describes Polpa as finely chopped for cooking applications including oven dishes.
- Its listed ingredients are tomato 99.8% and salt.
- Mutti declares 0.30g salt per 100g for Polpa, above the other named products in this comparison.
Tinned tomatoes on Joybuy
These options cover a single tin and multipacks for a student kitchen. Compare their pack sizes with your storage space and check each current label when salt is your deciding factor.
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Laila Canned Chopped Tomatoes 12 x 400g
The 12 x 400g pack may fit a shared kitchen that regularly cooks with chopped tomatoes; check that you have room for it. The listing says to refrigerate opened contents in a non-metallic airtight container and use them within two days.
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Napolina Chopped Tomatoes 4 x 400g
This four-tin pack suits a cupboard where chopped tomatoes will be used regularly. Napolina describes the tomatoes as chunky and states 0.10g salt per 100g; the Joybuy listing says to refrigerate opened contents in a non-metallic container and use them within two days.
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KTC Chopped Tomatoes 400g
A single 400g tin offers a smaller cupboard quantity than the multipacks shown here. Compare its current salt declaration with other tins and check the can for instructions on storing any leftovers after opening.
Questions about choosing and storing tomatoes
How can I compare tins that do not say 'reduced salt'?
Compare salt per 100g on the exact packs. The selected ASDA, M&S, Tesco, Napolina and Mutti products declare 0.01g, 0.02g, 0.09g, 0.10g and 0.30g per 100g respectively; check current labels in case product information changes.
Does a lower salt figure mean a tin is salt-free?
No. A tin can declare less salt than another without containing none. Compare the stated amounts and read any claim on the specific pack rather than treating different descriptions as interchangeable.
How can I season tomato sauce without routinely adding salt?
Start with a plain tomato base and season it to taste. The NHS suggests herbs, spices, black pepper, garlic, chilli or lemon; check other ingredients in the recipe when comparing its salt contribution.
What should I do with chopped tomatoes left in an opened tin?
Follow that tin's storage instructions and transfer leftovers to a suitable non-metallic container. ASDA says to refrigerate and use its opened product within four days; M&S says to transfer, refrigerate and eat its product within three days.
Should I check the label if I have bought the same tomatoes before?
Yes. Check the current pack's nutrition panel, ingredients and storage instructions, particularly when salt content or handling leftovers affects your choice.