Families serving defined portions
If several snacks may be served over half-term, compare the calories in the sealed bag or in the amount you will measure out. A sharing bag does not define one snack on its own.
Who is choosing these snacks?
Shoppers comparing salt as well as calories
Check salt for the portion you plan to serve. Tyrrells declares 0.02g salt per 30g serving for Naked, but that serving contains 156 kcal and comes from a 150g bag.
Households with dietary or allergen requirements
Use the current label for the exact flavour and pack. Dietary-suitability statements do not replace the ingredients list and any precautionary allergen wording.
What should you compare?
Start with the amount that will actually be served, then compare the nutrition and label information for that amount.
| Priority | What to check | Your needs |
|---|---|---|
| Snack portion | Compare kcal per sealed bag or stated serving. For different portion sizes, also check kcal per 100g; divide a sharing bag before serving. | I want to know how much one snack contains, rather than comparing a 25g bag with an entire sharing pack. |
| Salt | Read salt per stated serving and note its weight. Walkers declares 0.34g per 25g Ready Salted bag; Tyrrells declares 0.02g per 30g serving of Naked. | If salt matters to my household, I need to compare it separately from calories and allow for the different serving sizes. |
| Ingredients and allergens | Check the exact flavour’s ingredients, dietary declarations and precautionary allergen wording on the current pack. | A plain-sounding flavour or a vegan declaration alone does not answer my household’s allergen questions. |
| Label claims | Keep a portion-based calorie comparison distinct from a claim about the whole product. Calorie figures alone cannot establish HFSS status under the Department of Health and Social Care’s nutrient profiling model. | I want to compare snacks without assuming that a smaller bag has a different product classification. |
Common comparison mistakes
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Calling a small bag a low-calorie product
A smaller bag can contain fewer calories per snack without changing the product’s calories per 100g. Seabrook declares 126 kcal per 25g bag and 505 kcal per 100g for Lea & Perrins crisps.
Use the per-bag figure to plan what to serve and the per-100g figure when comparing different pack sizes.
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Assuming no added salt means fewer calories
Tyrrells Naked declares 0.02g salt and 156 kcal per 30g serving. Its 150g pack contains five stated servings.
Choose it for its stated salt and ingredients if those meet your needs, but measure the serving rather than treating the salt description as a calorie comparison.
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Overlooking allergen warnings
Walkers Ready Salted carries a factory statement covering milk, wheat, gluten, barley, soya, celery and mustard. An ingredients list and a precautionary statement answer different questions.
Read both on the current pack for the exact product, even when the flavour sounds plain.
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Inferring HFSS status from calories
The Department of Health and Social Care’s nutrient profiling model considers more than a calorie figure. A comparison between two snack portions therefore does not establish either product’s HFSS classification.
If crisps are intended for a school setting rather than home snacking, check the rules and food policy applicable to that school.
Brand and product references
These examples illustrate differences between particular products and packs; a brand name alone does not establish a calorie or allergen profile.
Walkers
Ready Salted is an example of a potato crisp sold in a defined 25g bag.
- Walkers declares 130 kcal and 0.34g salt per 25g Ready Salted bag.
- That product also carries a factory cross-contact statement for several allergens; check the current pack.
Tyrrells
Naked offers a no-added-salt potato-crisp option in a 150g, five-serving bag.
- Tyrrells declares 0.02g salt per 30g serving of Naked.
- The same serving contains 156 kcal, so the bag needs portioning for a per-snack comparison.
KETTLE Chips
Lightly Salted is a sharing-format potato crisp that KETTLE describes as gluten-free and suitable for vegans.
- KETTLE declares 516 kcal and 0.7g salt per 100g for Lightly Salted.
- Measure the amount served to turn those per-100g figures into a comparison for one snack.
Seabrook
Seabrook’s potato-crisp flavours show why the exact bag size matters.
- Seabrook declares 126 kcal per 25g Lea & Perrins bag and 164 kcal per 31.8g Sea Salted bag.
- Its baked lentil snacks are a different type of product, not a like-for-like potato-crisp comparison.
Pipers
Pipers makes flavoured potato crisps, including Upton Cheyney Jalapeño & Dill.
- Pipers declares 514 kcal and 0.75g salt per 100g for that flavour.
- Its jalapeño flavour may not meet a household’s preference for a plain crisp; compare the amount served before comparing snack calories.
REAL Hand Cooked Crisps
REAL is a hand-cooked crisp brand with products associated with pubs and cafés.
- Check the particular pack and flavour when considering it for a half-term snack.
- Use the current pack label for calories, ingredients and allergens rather than applying another crisp’s figures to it.
Joybuy options for snack portions
These options include single-bag multipacks and sharing bags. The PopChips option is a potato-based snack rather than a direct substitute in the potato-crisp comparisons above.
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Walkers Ready Salted Crisps, 6 × 25g
The individual 25g bags give you a defined amount to serve. Walkers declares 130 kcal per 25g for Ready Salted; check the current pack’s allergen information before serving.
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Walkers Ready Salted Crisps, 12 × 25g
This larger multipack retains the defined 25g bag size for serving. Walkers declares 130 kcal per 25g for Ready Salted and lists a factory cross-contact statement; read the current pack if allergens matter to your household.
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Walkers Ready Salted/Cheese & Onion, 12 × 25g
The 25g bags offer a defined serving with two flavours to choose from. Check the nutrition and allergen information for each flavour separately, particularly if milk is a concern.
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PopChips Sour Cream & Onion, 85g
This potato-based snack comes in an 85g sharing bag, so decide how much to serve before using a per-serving calorie figure. Check the current ingredients and allergen wording, especially for milk.
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Tyrrells Lightly Sea Salted Crisps, 150g
This 150g sharing bag needs dividing if you want to compare calories for one snack. It is Lightly Sea Salted, not the Tyrrells Naked product discussed above, so use this pack’s own nutrition and allergen label.
Questions about crisp portions
How do I compare a 25g bag with a sharing bag?
Compare calories and salt for the amount you plan to serve, then use the per-100g figures for a comparison across different portion sizes. A sealed 25g bag defines one amount; divide or weigh a serving from a sharing bag before comparing it.
Does a smaller bag make the crisps a low-energy product?
No: a smaller bag changes the calories in that portion, not the product’s calories per 100g. Describe a lower figure per snack as a portion comparison rather than a claim about the product as a whole.
Does a lower calorie figure establish that a crisp is non-HFSS?
No. The Department of Health and Social Care’s nutrient profiling model considers a broader nutrient score, so calories for one bag cannot establish the HFSS status of that crisp.
Are the same school-food rules in place across the UK?
Do not apply one nation’s guidance to every UK school. The Department for Education’s school-food practical guide applies to England; if a snack is for school rather than home, check the rules and policy applicable to that school.
Do allergen advisory statements matter for plain crisps?
Yes. The Food Standards Agency explains that precautionary allergen labelling communicates possible unintended allergen presence. Walkers Ready Salted has a factory cross-contact statement, so check the exact current pack rather than relying on the flavour name or a short ingredients list.