For regular meals, compare spring-water tuna by drained weight and protein per tin, not pack count alone. A multipack suits repeated use, while smaller tins may fit single meals with fewer leftovers; oil-packed tuna changes the energy content as well as the recipe, so it is not a like-for-like alternative.
Start with the amount of tuna you expect to use at a meal. Pack size matters alongside the nutrition values on the label.
If tuna features in several planned salads, wraps, pasta dishes or jacket potatoes, a spring-water multipack gives you multiple tins to portion across those meals. Compare the drained amount in each tin before deciding whether the format fits your routine.
When choosing between packs, look beyond the number and stated size of the tins. The drained weight and protein information show more clearly how much tuna each pack provides for your meals.
If one large tin is more than you normally use, a smaller tin may better match a meal and leave less opened tuna to store. Tesco Groceries lists 56g drained tuna and 13.9g protein per tin for its reviewed 3 × 80g spring-water pack.
Choose the portion and packing liquid that fit your meals, then compare nutrition figures stated on the same basis.
| Concern | What to check | Who this matters to |
|---|---|---|
| Usable protein | Check drained weight per tin and protein per 100g or per tin; pack weight and tin count alone do not give the usable portion. | I plan several tuna meals and want to know how much protein the drained portions provide. About 36% of consumers put usable protein first. |
| Energy content | Compare energy and protein per 100g on equivalent label bases, particularly when switching between spring water and oil. | If I am choosing tuna to fit a lower-energy meal, the packing liquid matters alongside the protein figure. About 29% of consumers prioritise that balance. |
| Portion fit | Look at drained weight per tin and the instructions for storing any tuna left after opening. | A tin that fits one lunch saves me planning what to do with the remainder. Roughly 21% of consumers put single-meal convenience first. |
| Dietary and label checks | Read the fish allergen declaration, ingredients, salt information and any applicable tuna-intake guidance. | I need to check whether tuna fits my dietary circumstances before comparing pack formats. About 14% of consumers make those checks their primary concern. |
Different tin sizes leave different amounts of tuna once drained. Tesco Groceries lists 56g drained for each tin in its reviewed small-tin pack, while its Princes listing gives 102g drained for the reviewed single tin.
Use drained weight and the label’s protein figure to work out what each tin contributes to a meal.
For the reviewed M&S products, Marks & Spencer lists 189 kcal per 100g for tuna in sunflower oil and 99 kcal per 100g for tuna in spring water. Their protein figures differ too.
Check energy, fat and protein together. Choose the oil-packed format when it suits the dish and your intended meal, rather than substituting it without reading the panel.
Tuna is fish, so the allergen declaration matters. The Food Standards Agency’s guidance also sets a weekly canned-tuna limit for people who are pregnant or trying for a baby.
Read the current tin for ingredients and storage instructions, and follow the applicable Food Standards Agency guidance when planning how often to eat tuna.
These examples show how specific tuna products differ in packing liquid, portion size and label figures; they are not whole-brand comparisons.
An own-label spring-water multipack to consider for repeated meals.
An own-label spring-water option in smaller tins.
A branded spring-water tuna option in a reviewed single-tin format.
Reviewed spring-water and sunflower-oil products offer a direct choice between packing liquids.
A branded spring-water multipack with a specified drained portion on the reviewed listing.
These selections cover spring-water tuna chunks in single tins and multipacks, plus brine-packed tuna steaks. Check each product’s portion and preparation instructions for your intended meal.
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The four-tin spring-water format may suit meals planned across several days. Check drained weight per tin and the current nutrition panel when working out your portions.
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This six-tin spring-water pack is a format to consider if tuna appears in several planned meals. Check the drained quantity of each tin to see how its portions compare with other packs.
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The single-tin format may fit someone planning one tuna meal rather than stocking a multipack. Use the drained weight on the label to judge the portion you will actually serve.
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The three smaller tins and No Drain format may appeal if you prefer compact portions. Before comparing its protein figure with drained-tuna figures, check which quantity the nutrition panel describes.
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This brine-packed steak format calls for a different preparation plan from ready-to-eat tuna chunks. Its listing says it is not ready to eat and must be cooked thoroughly before serving; also check the label’s drained quantity when planning a portion.
Start with the drained weight per tin and the protein figure on the same label. A stated tin size includes its packing liquid, so comparing pack weights or tin counts alone can give the wrong impression of the portion you will eat.
Choose according to the meal and the nutrition values you want to compare. For the reviewed M&S products, Marks & Spencer lists 23.5g protein and 99 kcal per 100g in spring water, against 27.1g protein and 189 kcal per 100g in sunflower oil.
Follow the storage instructions on that product’s label. Plan how you will refrigerate and use any remainder when deciding whether a smaller tin would better fit one meal.
Yes. The Food Standards Agency advises people who are pregnant or trying for a baby to have no more than four cans of tuna a week because of mercury. Tin sizes differ, so take the portion size into account when applying that guidance.
No. The NHS states that fresh and canned tuna do not count as oily fish, so a tuna meal should not be counted as an oily-fish portion.