Parents packing school lunchboxes
An individual bag makes it easier to compare the amount going into a lunchbox. Read the nutrition figures for the inner pack rather than treating the whole multipack as one serving.
Who is this for?
Buyers comparing calories per snack
Pack size matters alongside calories: an 18 g potato snack and a larger bag of conventional crisps are not equal portions. Check the per-100 g figures when you want a common comparison basis.
Families checking ingredients and allergens
Choose by the exact flavour and current packaging, not a range description. Ingredient declarations and precautionary allergen statements can differ between snacks.
What should you compare?
Start with the bag that will actually be eaten. Then use the per-100 g panel and ingredient information to see what the pack figure alone cannot tell you.
| Priority | What to check | Your needs |
|---|---|---|
| Portion calories | Read kcal for the individual bag and its weight in grams. Compare kcal per 100 g separately if pack sizes differ. | I want to know the calories in the bag going into the lunchbox, rather than assume every bag in a multipack is the same size. |
| Salt | Check salt per bag for the portion and salt per 100 g for a common basis. Walkers lists 0.53 g per 21 g French Fries Ready Salted pack and 0.19 g per 22 g Oven Baked Sea Salt pack. | A lower-calorie pack is not automatically the lower-salt option; I want to compare both figures before choosing a regular lunchbox snack. |
| Snack format | Check whether the product is a conventional potato crisp, a baked crisp or a crisp-style snack. Compare the stated bag weights rather than assuming equal servings. | If the child expects conventional crisps, I need to check whether a French Fries-style or other potato snack is an acceptable alternative. |
| Allergens | Read the ingredients and any 'may contain' or factory-handling statement on the exact flavour. The Food Standards Agency explains that precautionary wording indicates possible unintended allergen presence. | Where allergens matter, I need the current pack information for this particular snack, not an assumption based on its flavour or range name. |
Common buying mistakes
-
Calling a small pack 'low calorie'
A small bag can have fewer calories per pack without being low in energy per 100 g. UK legislation sets a maximum of 40 kcal per 100 g for a low-energy claim on solid food; Walkers lists 434 kcal per 100 g for French Fries Ready Salted and 438 kcal per 100 g for Oven Baked Sea Salt.
Describe the specific per-pack calorie figure, and read the per-100 g line before relying on a low-energy description.
-
Looking at calories but not salt
Walkers lists 91 kcal and 0.53 g salt for a 21 g French Fries Ready Salted pack, against 96 kcal and 0.19 g salt for a 22 g Oven Baked Sea Salt pack. The choice changes depending on which figure you are comparing.
Compare salt per bag as well as per 100 g after narrowing down the portion sizes.
-
Assuming every crisp-style snack is a potato crisp
Seabrook Salt & Vinegar Crunchies is a potato snack, while Walkers Oven Baked Sea Salt is a baked potato crisp. Their listed individual bags also have different weights.
Check the product type and bag size if the lunchbox recipient prefers a particular crisp format.
-
Relying on a flavour name for allergen suitability
Seabrook lists possible milk, soya, sulphites and gluten-containing cereals for Salt & Vinegar Crunchies. Walkers lists factory handling of wheat, gluten, barley, soya, celery and mustard for French Fries Ready Salted.
Read the current pack for the exact flavour, including both ingredients and precautionary statements.
Brand and range references
These examples help compare product formats and label figures; a brand name alone does not establish the calories or allergens of another flavour or pack size.
Walkers
Walkers lists individual-pack figures for French Fries Ready Salted and Oven Baked Sea Salt, two different lunchbox snack formats.
- Walkers lists 91 kcal per 21 g French Fries Ready Salted pack and 96 kcal per 22 g Oven Baked Sea Salt pack.
- Their listed salt differs: 0.53 g and 0.19 g per pack respectively. Check the allergen information for the pack selected.
Seabrook
Seabrook lists both a small potato-snack bag and a larger conventional crisp bag.
- Seabrook lists 81 kcal per 18 g Salt & Vinegar Crunchies bag and 164 kcal per 31.8 g Sea Salted crisps bag.
- Crunchies are a different product format; their listed precautionary allergens include milk, soya, sulphites and gluten-containing cereals.
Tyrrells
Tyrrells publishes nutrition figures for its lentil crisps, which should be compared as a lentil-crisp format rather than an equal-weight potato-crisp alternative.
- Tyrrells lists 140 kcal per 30 g serving for Sweet Chilli & Red Pepper and 141 kcal per 30 g serving for Sour Cream & Onion.
- Tyrrells' stated comparison of 30% less fat than standard potato crisps on average concerns fat, not calories.
KETTLE Chips
The Lightly Salted product provides a per-100 g reference for buyers considering this crisp format.
- KETTLE Chips lists 516 kcal, 29.5 g fat and 0.7 g salt per 100 g for Lightly Salted.
- KETTLE Chips describes this flavour as gluten-free and suitable for vegans and vegetarians; check the exact pack for ingredient and allergen details.
McCoy's
McCoy's Salted has published per-100 g figures for comparison with other stated flavours and formats.
- McCoy's lists 533 kcal and 1.3 g salt per 100 g for Salted.
- Its Salted product lists possible milk, soya, gluten and mustard cross-contact.
REAL Hand Cooked Crisps
REAL describes its range as vegetarian and gluten-free, with no added MSG.
- Those are range statements from REAL, not calorie figures for an individual lunchbox bag.
- Read the chosen flavour's pack for its serving size, nutrition and allergen information.
Portioned snacks on Joybuy
These multipacks offer individual bags for a school lunchbox, including popped, baked and other crisp-style snacks. Compare the nutrition and allergens of the particular inner bag before choosing.
No image available
PopChips Sour Cream & Onion 5 x 17 g
The five individually sized 17 g bags make it possible to compare nutrition for one lunchbox portion. Check the current pack's milk and soya allergen information.
No image available
Walkers French Fries Variety 6 x 18 g
This variety multipack contains six 18 g bags. Check calories, salt and allergens for the flavour being packed; figures for Walkers' separately listed 21 g Ready Salted pack should not be treated as figures for these 18 g bags.
No image available
Walkers Oven Baked Variety Pack 6 x 22 g
The six 22 g bags offer a baked-crisp format. Walkers' 96 kcal figure applies to its named Sea Salt 22 g pack; read each flavour's label before applying that figure to a variety pack.
No image available
Jacob's Crinklys Cheese & Onion 6 x 23 g
This multipack contains six 23 g bags of cheese-and-onion snacks. Compare the bag's calorie and salt figures with other formats, and check its milk and wheat allergen information.
No image available
Wheat Crunchies Crispy Bacon 6 x 20 g
The six 20 g bags provide a portioned wheat-snack alternative to potato crisps. Read the individual pack for calories and salt, and check its wheat, barley and soya allergen information.
Questions about lunchbox crisps
Does a smaller crisp bag count as low energy?
Not simply because it contains fewer calories per bag. UK legislation permits a low-energy claim for solid food only at no more than 40 kcal per 100 g. For comparison, Walkers lists 434 kcal per 100 g for French Fries Ready Salted and 438 kcal per 100 g for Oven Baked Sea Salt; describe their stated pack calories rather than calling those products low energy.
Should I compare calories per bag or per 100 g?
Use the bag figure to understand the intended lunchbox portion and the per-100 g figure to compare different bag sizes on the same basis. The NHS notes that labels may give per-portion information alongside per-100 g values, and that a manufacturer's portion may differ from the amount someone eats.
Does the pack with fewer calories also have less salt?
Not necessarily. Walkers lists French Fries Ready Salted at 91 kcal and 0.53 g salt per 21 g pack, while Oven Baked Sea Salt is 96 kcal and 0.19 g salt per 22 g pack. Compare both lines for the exact flavour and pack size.
How do I check allergens in a school snack?
Read the current ingredient list and precautionary allergen wording for the exact flavour before packing it. For example, Seabrook lists possible milk, soya, sulphites and gluten-containing cereals for Salt & Vinegar Crunchies; a general range description cannot replace that pack-specific check.