For a quick tinned-soup lunch, compare the calories in the amount you will eat—often the whole tin—rather than choosing by a “low fat” label or range name alone. Asda Groceries lists Heinz Weight Watchers Tomato Soup at 76 kcal and 1.7g salt per 295g tin; check salt, ingredients and preparation as well as calories when deciding whether a soup suits your lunch.
If you expect to eat the whole tin, its total calories are more useful for your lunch decision than a per-100g figure on its own. Check whether the labelled serving is half a tin before comparing products of different sizes.
A lower calorie total does not establish a lower salt total. Asda Groceries lists 1.7g salt in the 295g tin of Heinz Weight Watchers Tomato Soup, so read the salt figure for the quantity you plan to eat.
Read the ingredients on the current tin rather than judging suitability from its flavour or range name. The Heinz tomato soups listed by Asda Groceries and Sainsbury’s include milk; check the exact product you are buying.
Start with the portion you will eat, then compare salt, preparation and ingredients for that same lunch.
| Priority | What to check | Your needs |
|---|---|---|
| Calories per portion | Read kcal per 100g and per serving. If eating the whole tin, multiply kcal per 100g by its weight in grams and divide by 100; check whether the stated serving is only half a tin. | I want to compare the lunch I will actually eat, not equal-looking serving figures from different-sized tins. |
| Salt | Compare salt per 100g, then read or calculate the amount in your portion. NHS food-label guidance describes 0.3g salt or less per 100g as low and more than 1.5g per 100g as high. | Calories matter to me, but I also want to know how much salt is in the whole tin if that is my lunch. |
| Preparation | Check whether the soup is ready to heat or condensed. For condensed soup, follow the dilution instructions and account for any milk or other ingredients you add. | If I have limited time or facilities at lunch, I need to know what preparation the soup requires. |
| Ingredients and allergens | Read the current tin’s ingredient list. GOV.UK says that any of the 14 regulated allergens present as ingredients in prepacked food must be clearly labelled there. | I need to check the particular recipe rather than assume a tomato, mushroom or vegetable flavour tells me everything in it. |
Those descriptions address different properties; neither tells you the calories in the portion you will eat. A tin labelled as two servings may still be one lunch for you.
Compare kcal per 100g and the total for your intended portion, then consider the other nutrition figures separately.
Asda Groceries lists Heinz Weight Watchers Tomato Soup at 76 kcal but 1.7g salt for its 295g tin. One figure cannot stand in for the other.
Check salt per 100g for comparison and salt per portion for the amount you intend to eat.
The nutrition figure for soup as sold may not describe the prepared lunch. Ocado lists Campbell’s Cream of Mushroom Condensed Soup at 90 kcal per 100g as sold and gives directions to add water, or milk or a milk substitute.
Decide how you will prepare it and include any added ingredients when comparing lunches.
Using milk or a milk substitute adds another ingredient to measure and check for suitability.
A recipe or its online product information can change, which matters particularly when an ingredient must be avoided.
Use online details to narrow your choice, then read the ingredients and allergen information on the tin you purchase.
Compare individual recipes within these ranges: a brand name or range label does not establish the calories or salt in every tin.
The tomato soups in this comparison include Weight Watchers Tomato Soup and No Added Sugar Cream of Tomato Soup, with different tin sizes and nutrition figures.
Tesco Groceries lists own-label low-fat tomato and lentil-and-vegetable soups in its filtered tinned-soup range.
Sainsbury’s product information covers both a tomato-and-spicy-lentil soup and a standard Cream of Tomato Soup.
M&S lists creamy, chunky and Eat Well options within its tinned-soup range.
Campbell’s condensed soups can be prepared as soup or used as a cooking ingredient.
These Joybuy options are an Itoen corn potage in a 185g size and a Heinz mushroom soup in a 400g size. Compare the portion you would eat and check each current pack’s nutrition and ingredients before choosing.
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The 185g size gives you a different portion to assess from a larger lunch tin. Check the current pack’s calories, salt and ingredients, particularly if you avoid milk.
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Decide how much of the 400g soup you would eat for lunch, then use that portion when comparing calories and salt. Check the current tin’s ingredients and storage instructions if you plan to keep any soup for later.
No: fat and calories are different measures. For a lunch comparison, read the kcal for the amount you will eat rather than treating a “low fat” description as the answer.
Multiply the stated kcal per 100g by the tin’s weight in grams, then divide by 100. If the label gives a per-serving figure, check how many servings it assigns to the tin before using that figure for your lunch.
Use salt per 100g to compare products on the same basis, then read or calculate salt for the portion you will eat. NHS guidance describes 0.3g salt or less per 100g as low and more than 1.5g per 100g as high.
Assess it after deciding how you will prepare it. Ocado gives directions for Campbell’s Cream of Mushroom Condensed Soup to be mixed with water, or with milk or a milk substitute; added ingredients can change the finished lunch’s nutrition and allergen considerations.
Read the ingredient list on the current tin. GOV.UK says any of the 14 regulated allergens present as ingredients in prepacked food must be clearly labelled there; do not rely on a flavour name or an older online listing when checking a particular recipe.