Shoppers planning quick lunches
If you stock the cupboard during a weekly shop, compare kcal per 100g and decide whether a 400g tin will make one lunch or two. A half-can figure does not describe the whole tin.
Who needs to check the portion?
A per-100g figure helps compare soups, but the portion you serve determines how much of the tin goes into a meal.
Shoppers choosing a meal format
A smooth tomato soup and a lentil-and-vegetable soup offer different ingredients and textures. Decide whether you will serve the soup alone or add something else, and include those additions when considering the meal.
Vegetarian, vegan and allergy-aware households
Check each exact tin. Heinz Cream of Tomato contains milk, while M&S says its vegan Tomato and Basil Soup is not suitable for people with a milk or egg allergy.
What matters on the label?
Start with a common weight for comparison, then work out what the portion you intend to eat contributes.
| Priority | What to check | Your needs |
|---|---|---|
| Calories and portion | Compare kcal per 100g, then check the declared serving weight. If the label gives figures for half a 400g tin, eating the whole tin doubles those figures. | I might eat a whole tin for lunch, so I need the calories for that amount—not just the half-can serving printed on the label. |
| Salt | Read salt per 100g and for your intended portion separately from calories or a low-fat claim. Where shown, traffic-light labelling can help you compare products before reading the full panel. | A lower-calorie figure is not my only consideration; I want to know the salt in the quantity I will serve. |
| Ingredients and allergens | Read the current ingredients, highlighted allergens and any specific allergy warning. Check these even when a soup is described as vegetarian or vegan. | Someone in my household needs a suitable option, so the exact recipe and allergy statement matter more than the flavour name. |
| Storage and format | Check whether the soup is ready to heat or condensed, and follow the pack’s preparation instructions. If you expect leftovers, check its directions for storage after opening. | I want tins that fit my weekly-shop routine and can use any remaining soup within the period stated on the pack. |
What is easy to overlook?
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Reading half-can figures as a whole lunch
For the compared 400g soups that declare a 200g serving, the whole tin contains twice the stated half-can calories and salt.
Decide how much you will eat before comparing labels, and use the per-100g figures when portions differ.
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Assuming low fat also means low salt
Salt and calories describe different things. Tesco Groceries lists 0.69g salt per 200g for Low Fat Tomato Soup and 0.93g per 200g for Low Fat Lentil & Vegetable Soup.
Compare salt for the same amount of soup alongside the calorie figure.
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Judging dietary suitability by the soup flavour
Tomato soup can contain milk. M&S also gives milk and egg allergy exclusions for its vegan-labelled Tomato and Basil Soup.
Read the current ingredient and allergen information for the exact product each time you buy it.
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Comparing condensed and ready-to-heat soup as though they were the same format
Tesco Groceries lists Campbell's condensed soups in 295g packs alongside ready-to-heat soups sold in different sizes. Preparation can change the amount of soup served.
Check the preparation directions and whether nutrition is stated for the product as sold or as prepared before comparing portions.
Which brands offer useful reference points?
These examples show why the exact product and serving basis matter more than a brand-wide assumption.
Tesco
Tesco Groceries lists Low Fat Tomato and Low Fat Lentil & Vegetable soups in 400g tins, allowing a comparison at the same 200g portion size.
- Low Fat Tomato lists 61 kcal and 0.69g salt per 200g; Low Fat Lentil & Vegetable lists 87 kcal and 0.93g salt per 200g.
- The lentil-and-vegetable recipe includes celery. Check the current pack for ingredients and allergens.
Heinz
Sainsbury's lists both smooth Cream of Tomato and chunkier Vegetable Big Soup as 400g options.
- The listed half-can figures are 102 kcal for Cream of Tomato and 120 kcal for Chunky Vegetable Big Soup.
- Both listings give 1.1g salt per half can. Joybuy’s ingredient listing for Cream of Tomato also identifies milk.
M&S
M&S lists tomato soups with different recipes and dietary descriptions, so the product name alone does not settle the comparison.
- Tomato and Basil lists 34 kcal per 100g and is labelled vegan and vegetarian; Cream of Tomato lists 63 kcal per 100g.
- M&S says Tomato and Basil is not suitable for people with a milk or egg allergy, while Cream of Tomato contains milk ingredients.
Campbell's
Tesco Groceries lists Campbell's 295g condensed Cream of Mushroom and Cream of Chicken soups.
- The condensed format gives shoppers a distinct preparation option to consider.
- Check the directions and nutrition basis before comparing a prepared serving with a ready-to-heat 400g soup.
Joybuy soup options for a weekly shop
These Joybuy soup options include different tin sizes and a 400g soup whose pack format needs checking. Compare the current labels for the portion, ingredients and storage that suit your shop.
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Heinz Cream of Mushroom Soup 400g
A 400g mushroom soup to consider if you plan to divide a tin between meals. Check the calories and salt for the portion you will eat; the listed ingredients identify milk and wheat.
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Itoen Special Rich Corn Potage Soup 185g
The 185g size may suit a smaller soup occasion than a 400g tin; check the serving basis before comparing meal portions. The listed ingredients include milk and chicken bouillon flavouring, and the current pack should be checked before relying on its carbohydrate and sugars figures.
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Crosse & Blackwell Best of British Spicy Parsnip & Carrot Soup 400g
A 400g parsnip-and-carrot soup to consider for a planned cupboard meal. Confirm the pack format before treating it as a tinned option, and check its serving size and listed celery, milk and wheat.
Common questions about tinned soup
How can I compare calories between different tins?
Compare kcal per 100g first, then calculate the amount you intend to eat. As NHS food-label guidance explains, nutrition information is given per 100g or 100ml and may also include a portion figure; for a 400g tin declaring a 200g serving, the whole tin contains twice the stated serving calories.
Does low fat mean a soup is low in salt?
No—read the salt figure separately. NHS guidance describes 0.3g of salt or less per 100g as low for foods, while Tesco Groceries lists 0.69g salt per 200g for Low Fat Tomato Soup and 0.93g per 200g for Low Fat Lentil & Vegetable Soup.
Is a vegan-labelled soup suitable for someone with a milk allergy?
Do not rely on the vegan description alone. M&S labels its Tomato and Basil Soup vegan but states that it is not suitable for people with a milk or egg allergy; check the allergy statement on the current pack.
What should I do with soup left after opening a tin?
Follow that product’s instructions for transferring, refrigerating and using the remainder. If you expect to eat only half a tin, check those directions during your shop rather than assuming the same storage period applies to every soup.