Solo cooks comparing salt per meal
If one can forms the base of a pasta sauce, soup, curry or stew, compare salt for the amount going into the pan. The 227g Tesco, Sainsbury’s and Napolina cans have different declared whole-can salt amounts.
Who is choosing for one meal?
The amount of tomato a recipe needs, and whether you will use any remainder, can matter as much as the salt figure on the front of a pack.
Small households avoiding leftovers
A 227g can may fit a smaller recipe without leaving part of a 400g can to store. Sainsbury’s describes its 227g chopped tomatoes as one serving; check the amount your recipe actually calls for.
Cooks planning a second tomato-based meal
A 400g can is worth considering when another use for the remainder is already planned. Check its opened-pack instructions: the Mutti 4 x 400g listing says to refrigerate after opening and consume within five days.
What should you compare?
Start with salt per 100g, then compare the amount your recipe will use and the storage instructions if any tomatoes will be left over.
| Priority | What to check | Your needs |
|---|---|---|
| Salt in the portion | Compare salt per 100g with the 0–0.3g low-salt guide cited by MyHealthLondon NHS. Then read the whole-can value or calculate salt for the amount your recipe uses; Tesco Groceries lists less than 0.01g for its full 227g can. | I want to know how much salt the tomatoes add to this meal, not just how the figures compare per 100g. |
| Can and pack size | Check whether the recipe calls for roughly 227g, a full 400g can or part of one. For multipacks, distinguish the number of cans from the weight of each can. | A smaller can suits me when I am cooking once and would rather not keep an opened remainder. |
| Leftover storage | Read the exact pack’s transfer, refrigeration and use-by instructions after opening. Sainsbury’s 227g listing specifies a non-metallic container and use within two days; the Mutti 4 x 400g listing specifies refrigeration and use within five days. | If I open a larger can, I need a realistic plan for the unused tomatoes before their stated storage period ends. |
What is easy to overlook?
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Comparing only salt per 100g
The amount used changes the salt contribution. For example, the ASDA Groceries listing for Mutti 4 x 400g gives 0.30g salt per 100g, which works out to approximately 1.2g if one entire 400g can goes into a meal.
Compare the quantity you will cook with the label value, and include other ingredients when considering the finished meal.
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Assuming every 227g can is alike
Current listings give different whole-can figures: Tesco Groceries lists less than 0.01g salt, Sainsbury’s lists 0.16g and ASDA Groceries lists 0.23g for the Napolina can.
Check the nutrition panel for the exact can you intend to buy rather than choosing by weight or brand alone.
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Opening a 400g can without a second use
A partly used can needs attention after cooking. Opened-pack instructions differ: the cited Napolina and Sainsbury’s listings say to use refrigerated contents within two days, while the cited Mutti listing says five days.
Plan the next recipe and follow the instructions on your particular pack, including any direction to transfer the contents to another container.
Unused tomatoes may go to waste if you cannot use them within the pack’s stated period.
Relevant brand references
These examples concern specific tomato products and pack formats, not every tin sold under each brand.
Tesco
Tesco Italian Chopped Tomatoes 227g is a smaller-can option for a one-meal recipe.
- Tesco Groceries lists less than 0.01g salt for the whole 227g can.
- Use that figure for this exact product, and check its current label when buying.
Sainsbury’s
Sainsbury’s Chopped Tomatoes 227g is listed as one serving.
- Sainsbury’s lists 0.07g salt per 100g and 0.16g per can.
- For leftovers, its instructions specify transfer to a non-metallic container, refrigeration and use within two days.
Napolina
Napolina has a 227g chopped-tomato can as well as larger 400g formats.
- ASDA Groceries lists 0.10g salt per 100g and 0.23g per whole can for Napolina Chopped Tomatoes 227g.
- The cited 227g listing instructs users to refrigerate opened contents and use them within two days; check instructions for the pack you buy.
Mutti
Mutti finely chopped tomatoes come in a 4 x 400g format for recipes that call for a larger quantity or planned leftovers.
- ASDA Groceries lists 0.30g salt per 100g for its Mutti 4 x 400g product and says to refrigerate after opening and consume within five days.
- At that listed concentration, using a full 400g can contributes approximately 1.2g salt.
M&S
M&S describes its Chopped Italian Tomatoes as preserved in tomato juice.
- Check the nutrition panel on the exact pack to compare its salt per 100g and per portion with other options.
Joybuy tomato options
These Joybuy options are 400g chopped-tomato cans, including single cans and multipacks. For a one-meal recipe, check whether you will use the whole can or can follow the pack’s instructions for any remainder.
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Laila Canned Chopped Tomatoes 12 x 400g
This multipack suits a plan to use several 400g cans over separate recipes. One can may leave a remainder after a single-portion meal; check its label for opened-pack storage instructions.
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Napolina Chopped Tomatoes 4 x 400g
Four 400g cans suit recipes that use a full can or a plan for leftovers. The Morrisons listing for this 4 x 400g format says to refrigerate opened contents and use them within two days; check the instructions on your pack.
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Mutti Finely Chopped Tomatoes 4 x 400g
This four-can format suits a recipe using 400g or a plan for the remainder. ASDA Groceries lists 0.30g salt per 100g for the 4 x 400g product, or approximately 1.2g for a whole can, and instructs users to refrigerate after opening and consume within five days.
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KTC Chopped Tomatoes 400g
This is a single 400g can rather than a multipack. If your one-person recipe uses less than the full can, check the label’s storage instructions before planning to keep the remainder.
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Napolina Chopped Tomatoes 6 x 400g
Six 400g cans suit a plan for several tomato-based recipes, not a need for one smaller can. A partly used can needs a further use within the storage period stated on its label.
Frequently asked questions
What does “low salt” mean on a tinned-tomato label?
The low-salt guide cited by MyHealthLondon NHS is 0–0.3g salt per 100g. That per-100g figure helps compare products, but for one meal you should also check the salt in the amount of tomatoes you will use.
Which of the compared 227g cans lists the least salt per can?
Tesco Italian Chopped Tomatoes 227g lists less than 0.01g salt per can, compared with 0.16g for Sainsbury’s Chopped Tomatoes 227g and 0.23g for Napolina Chopped Tomatoes 227g in their respective retailer listings. Check the current label for the exact product when buying.
Can a 400g tin work for one person?
Yes, if the recipe uses the full can or you can store and use the remainder according to its pack instructions. For the Mutti 4 x 400g product, ASDA Groceries lists 0.30g salt per 100g, equivalent to approximately 1.2g for a full can, and says to refrigerate after opening and consume within five days.
How should I keep tomatoes left in an opened tin?
Follow the instructions on the exact pack. Sainsbury’s says to transfer leftovers from its 227g can to a non-metallic container, refrigerate and use within two days; the cited Napolina listings also instruct refrigeration and use within two days after opening.
Does a low-salt tomato tin settle the salt content of the whole meal?
No. The NHS says its adult limit of 6g salt a day includes salt already in food and salt added during or after cooking. Check ingredients such as stock, cheese, sauces and seasoning alongside the tomatoes.