How many calories in a bag of crisps? By bag size and type
A 25g bag of crisps is about 133 kcal and a sharing bag nearly 800. Why baked, veg and hand-cooked crisps barely differ, and why the bag size is the real number.
Crisps feel like the small snack. A bag is light in the hand, it is gone in a few minutes, and it comes free with a meal deal. It is easy to treat as background.
Per gram, it is one of the densest foods in the shop. Ready salted crisps are about 530 kcal per 100g, the same as milk chocolate and twice the density of bread. The only thing keeping a bag small is the bag.
The quick answer
Standard ready salted crisps, at about 530 kcal per 100g.
| Bag | Weight | Calories |
|---|---|---|
| Small puffed snack bag | 16g | 85 |
| Multipack bag | 25g | 133 |
| US snack serving, 1 oz | 28g | 148 |
| Older-style standard bag | 32.5g | 172 |
| Meal deal or vending bag | 40g | 212 |
| Grab bag | 50g | 265 |
| Sharing bag | 150g | 795 |
| Stacked crisp tube | 165g | 875 |
| Large sharing bag | 200g | 1,060 |
The 530 figure matches the main UK brands, which mostly sit between 520 and 540 kcal per 100g for standard fried crisps, and the USDA entries for potato chips land in the same range. It also matches the crisp figures already used in the potato breakdown and the popcorn breakdown.
Calories by weight
For a bowl, a handful, or a bag you have half finished.
| Amount | Calories |
|---|---|
| 10g, a small handful | 53 |
| 15g, a normal handful | 80 |
| 25g | 133 |
| 30g | 159 |
| 40g | 212 |
| 50g | 265 |
| 75g, half a sharing bag | 398 |
| 100g | 530 |
| 150g | 795 |
| 200g | 1,060 |
A sharing bag is about 795 kcal. That is more than a chip shop portion of chips, and about the same as five plain jacket potatoes. It is "for sharing" on the packet, and very often not in practice.
By type, per 100g and per bag
| Type | Calories per 100g | Per 25g bag |
|---|---|---|
| Air-popped popcorn | 387 | 97 |
| Baked crisps | 430 | 108 |
| Lentil, pea or popped chips | 440 | 110 |
| Reduced-fat crisps | 475 | 119 |
| Tortilla chips | 490 | 123 |
| Hand-cooked or kettle crisps | 505 | 126 |
| Vegetable crisps (beetroot, parsnip) | 515 | 129 |
| Ready salted, standard | 530 | 133 |
| Flavoured (salt and vinegar, cheese and onion) | 530 | 133 |
| Stacked crisps in a tube | 530 | 133 |
| Puffed corn cheese snack | 540 | 135 |
Read down the right-hand column. From baked crisps to the heaviest puffed snack, the whole aisle is within 27 kcal per 25g bag. The type of crisp is a small decision. The size of the bag is a big one.
Three things the table settles:
- Vegetable crisps are not a lighter crisp. They are thin slices of root vegetable fried in the same oil, at about 515 kcal per 100g. The colour is the only difference.
- Hand-cooked does not mean lighter. Kettle-style crisps are thicker and crunchier, and land at about 505, within a few calories of ordinary crisps.
- Flavour adds nothing worth counting. Salt and vinegar, cheese and onion and ready salted are within a few calories of each other. The seasoning weighs very little.
Why the light-looking bags win
The small puffed corn and potato snacks are the lowest-calorie bags in a multipack, at roughly 85 to 90 kcal. Per 100g they are around 520 to 540, the same as or slightly above ordinary crisps.
They win because they are mostly air. A 16g bag looks the same size as a 25g bag of crisps, so it feels like the same snack. This is the same effect that makes popcorn a reasonable snack despite being denser per gram than bread, which the popcorn breakdown sets out in full.
That makes a small puffed snack a genuinely useful swap, as long as it is the small bag. A sharing bag of the same snack is no lighter than a sharing bag of crisps.
The crisps that come with something
| Meal | Built as | Calories |
|---|---|---|
| Meal deal crisps | 25g bag | 133 |
| Crisp sandwich | 2 slices white bread, 10g butter, 25g crisps | 355 |
| Meal deal | Egg mayo sandwich, 25g crisps, cola | 769 |
| Pub snack with a pint | 50g bag plus a pint of 4% lager | 458 |
The meal deal figures come from the sandwich breakdown, where the crisps are the cheapest thing to swap after the drink. The beer breakdown has the pint, and a 50g pub bag, at 265, is more than the 193 kcal pint of lager beside it.
The crisp sandwich is a real and defended British lunch. At 355 kcal it is lighter than most shop sandwiches. The butter is 72 of that, and the crisps 133, so it is mostly bread and crisps in about the proportions it looks.
Fat and salt
A 25g bag of standard crisps carries around 8g of fat. Most UK crisps are fried in sunflower or rapeseed oil, so the saturated fat is low compared with a chocolate bar or a biscuit. The issue is the total energy, not the type of fat.
Salt is lower than its reputation per bag. A 25g bag of ready salted typically carries around 0.3g of salt, about 5% of the NHS adult maximum of 6g a day. Two slices of bread often carry more. The salt adds up with bag size like everything else: a sharing bag is closer to 2g, a third of the day. Check the label on your brand, since salt and vinegar and some flavoured varieties run higher.
UK and US words that trip up logging
- Crisps and chips. UK crisps are US chips. UK chips are US fries. Search "chips" in an American-built app and you will often be shown crisps, at 530 kcal per 100g against 240 to 313 for chips and fries, so a portion of chips can end up logged at nearly double.
- Tortilla chips. The same word in both countries, and a separate food from crisps at about 490 per 100g.
- Multipack and grab bag. A UK multipack bag is usually 25g. A grab bag is around 45 to 50g. The US equivalents are the 1 oz snack bag and the "big grab" bag.
- Sharing bag and family size. The same idea, usually 150g in the UK and often larger in the US.
- Crisp sandwich, crisp butty. Crisps inside buttered bread. A UK classic with no common US equivalent, though Americans do put chips in sandwiches.
Crisp mistakes to avoid
Logging a grab bag as a bag
A 50g grab bag is 265 kcal, twice a multipack bag. If the packet is bigger than your hand, check the weight on the front before logging.
Eating from the sharing bag
A sharing bag has no portions in it. Pour a handful into a bowl and put the bag away. 15g is about 80 kcal, and a bowl makes it visible.
Swapping to vegetable crisps to save calories
They save about 4 kcal a bag. Buy them because you like them.
Forgetting the crisps in the meal deal
At 133 kcal, the bag is a third of a typical sandwich's calories. A piece of fruit instead saves around 55 to 75 kcal and takes no effort.
Three ways to keep crisps and lose the excess
The small bag swap (85 kcal)
A small puffed corn or potato snack bag in place of a 25g bag of crisps. Same crunch, same salt hit, about 48 kcal less, because the bag is mostly air.
The bowl rule (159 kcal)
- 30g of your usual crisps, poured into a bowl from the sharing bag
Adds up to: 159 kcal. The bag goes back in the cupboard before the first crisp. Most people who do this find a bowl is enough, where an open bag rarely is.
The bigger, lighter snack (205 kcal)
- 25g air-popped popcorn (97 kcal)
- 25g baked crisps, mixed in (108 kcal)
Adds up to: about 205 kcal for a bowl that is several times the volume of a 25g bag. If the point of crisps is to have something to eat with a film, volume does more than type.
The verdict
A 25g bag of crisps is about 133 kcal, and a 150g sharing bag about 795. Per gram, crisps are as dense as milk chocolate.
The type barely matters. Baked, hand-cooked, vegetable and flavoured crisps all sit within about 30 kcal a bag of each other. The bag size is the whole story: a grab bag is twice a multipack bag, and a sharing bag is six.
If you change one thing, eat crisps from a bowl, never from the bag.
Snap the bag in Calow before you open it. The weight on the front is the one number that decides the log, and it is easy to miss on a grab bag.
Pairs well with: the popcorn calorie breakdown, how many calories in a potato, and how to stop night-time snacking.