People eating the whole tin at lunch
If you usually finish a tin in one sitting, the whole-tin kcal figure matters more than a half-can serving printed on the label. The NHS notes that a manufacturer’s portion may differ from the amount you eat.
Who is choosing a single tin?
People comparing calories and salt
A lower-calorie soup is not necessarily lower in salt. For example, Tesco Groceries lists 1.7g salt per can for Heinz Weight Watchers Tomato Soup and 1.9g for its Chicken Soup, both in 295g tins.
Vegetarian and chicken-soup shoppers
Flavour and dietary suitability can narrow the choice before you compare nutrition. Tesco Groceries labels the 295g Heinz Weight Watchers Tomato Soup and WW Carrot & Lentil Soup suitable for vegetarians; check the current can when choosing a particular product.
What should you compare?
Start with the quantity you will eat, then compare tins on the nutrition and dietary details that matter for that occasion.
| Priority | What to check | My needs |
|---|---|---|
| Whole-tin calories | Check the pack weight, stated portion size and kcal per portion or per 100g. If you eat two identical labelled half-can portions, count both. | I expect to finish the tin, so I want a kcal figure for the whole amount rather than just the manufacturer’s serving. |
| Salt | Compare salt for the amount you will eat, preferably between similar soups. A front-of-pack traffic light can be a quick screen; use the nutrition table for the quantity. | Calories are not my only consideration, and I want to see the salt total for my portion. |
| Soup as lunch | Read protein and fibre alongside whole-tin kcal, and note whether the soup is smooth or contains pieces or pulses. Those figures do not establish how satisfying a tin will be for you. | If this is my lunch, I want to compare more than the lowest kcal figure before deciding what else, if anything, to eat with it. |
| Dietary suitability | Check the current ingredients, allergen declaration and any vegetarian statement on the exact can. Do not infer suitability from the flavour name. | I need to know whether this particular recipe fits my dietary requirements or preferences. |
| Leftovers | If you will eat only part of a tin, follow its instructions for transferring, covering and refrigerating the remainder, and check its use-after-opening period. | I may split a larger tin across two occasions and need storage directions for that product. |
Common label mistakes
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Counting a half-can serving as the whole tin
A 400g tin may show nutrition for a 200g serving. Tesco Groceries lists its Low Fat Tomato Soup at 61 kcal and 0.69g salt per half-can; eating both labelled portions means counting 122 kcal and 1.38g salt.
Check the stated portion count before comparing tins or recording what you ate.
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Reading ‘low fat’ as ‘low salt’
Fat and salt are separate label measures. Tesco Groceries labels its 295g Heinz Weight Watchers Tomato Soup low fat and lists 1.7g salt for the whole can.
Compare the whole-tin salt figures of the soups you are considering rather than relying on a front-of-pack description.
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Using an older product listing as the final label
Recipes and nutrition information can change, as Tesco Groceries cautions on its soup listing. An earlier figure may not describe the tin in your hand.
Read the current can for nutrition, ingredients, allergens and storage directions before buying or using it.
Brand and retailer references
These examples show how different soup formats and labels affect the comparison; a brand name alone does not determine the whole-tin nutrition.
Heinz
Tesco Groceries lists 295g Heinz Weight Watchers tomato and chicken soups alongside larger Heinz Big Soup products.
- The tomato and chicken listings give whole-can figures: respectively 76 and 92 kcal for the 295g tins.
- Their listed salt totals are respectively 1.7g and 1.9g per can. Heinz Big Soup Steak & Potato instead gives figures per half-can, so check the portion before comparing it with a 295g tin.
Tesco
Tesco Low Fat Tomato Soup is a 400g own-label example with nutrition stated per 200g half-can.
- Tesco Groceries lists 61 kcal and 0.69g salt per half-can, equivalent to 122 kcal and 1.38g salt when both labelled portions are eaten.
- Tesco cautions that recipes and nutrition can change; use the current can for the final comparison.
M&S
M&S lists tinned soups that include vegetarian, vegan and Eat Well-labelled options.
- These labels can help narrow the range by stated dietary preference or the retailer’s own designation.
- Check each exact product’s whole-tin nutrition and ingredients rather than treating a range label as a comparison of calories or salt.
Campbell's
Campbell's 295g condensed chicken soup is prepared with added water, or with milk and water according to the instructions listed by Waitrose & Partners.
- The listing states two 147.5g portions and gives nutrition per 100g as sold, making the quantity of soup concentrate used important.
- Do not compare its 96 kcal and 0.86g salt per 100g as sold directly with figures for a prepared ready-to-eat soup; added milk also changes the prepared soup’s nutrition.
Asda
Just Essentials by Asda Tomato Soup is an own-label tinned-soup example listed by ASDA Groceries.
- It offers another exact product to consider when comparing tomato-soup tins.
- Read its current can for whole-tin nutrition, ingredients and dietary suitability before comparing it with another recipe.
Single-tin soup options on Joybuy
These 400g soup tins are options to consider if you expect to eat a single tin or divide one between servings. Compare the current label for the amount you plan to eat; their inclusion does not make them the lowest-calorie or lowest-salt choices.
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Heinz Cream of Mushroom Soup 400g
If you plan to eat this 400g tin in one sitting, use its current label to work out nutrition for the full amount. Check its ingredients and allergen declaration against your requirements.
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Crosse & Blackwell Best of British Spicy Parsnip & Carrot Soup 400g
For this 400g tin, compare calories, salt, protein and fibre for the portion you intend to eat. Check the current ingredient and allergen information if dietary suitability matters to you.
Questions about choosing and using a tin
Should I use calories per 100g, per serving or per tin?
Use the figure for the amount you will actually eat. If you finish a tin containing two identical labelled half-can servings, count both; if you eat only half, use that portion. The NHS notes that a manufacturer’s serving size may differ from yours.
Does a low-calorie tin provide everything needed for lunch?
Its calorie figure alone cannot answer that. Tesco Groceries lists 2.0–4.7g protein per can across its 295g Heinz Weight Watchers Tomato and Chicken soups and WW Carrot & Lentil Soup. Compare the tin’s protein, fibre and ingredients with what else you plan to eat rather than assuming the lowest-kcal option is a complete meal.
Why compare salt when choosing a lower-calorie soup?
Calories and salt measure different things. Tesco Groceries lists 76 kcal and 1.7g salt for a whole 295g Heinz Weight Watchers Tomato Soup tin, so check both figures for the quantity you will eat. A salt traffic light can help you scan packs, while the nutrition table gives the amount for comparison.
What should I do with soup left after opening a tin?
Follow that product’s storage instructions rather than assuming every soup has the same use-after-opening period. Tesco Groceries instructs shoppers to transfer unused Tesco Low Fat Tomato Soup to a covered, non-metallic container, refrigerate it and consume it within four days; check the current can for its directions.