How Many Calories Are Actually in Your Snack? Reading the Energy Line on a Singapore Label

The energy line is the first row of almost every nutrition panel, and probably the one most of us glance at and forget. But it is also the row that gets misread most often — partly because Singapore labels can show it in two different units, and partly because the words printed next to it ("low calorie", "light", "reduced") have precise legal meanings that don't match how we use them in conversation.

Here is what the number is really telling you, and what to do with it.

First, a surprise: many snack packets don't legally need a nutrition panel

If you have ever picked up a packet of keropok or biscuits and found no Nutrition Information Panel (NIP) at all, that isn't an oversight. Under Singapore's Food Regulations, as summarised by the Health Promotion Board, an NIP is only required for pre-packaged foods that carry a health or nutrition claim, are edible fats and oils, are Nutri-Grade beverages, or are special purpose foods.

A plain packet of crackers that makes no claim at all falls outside that list. Many manufacturers include a panel voluntarily — but they are not obliged to. There is also a small-pack exemption: HPB's guide to nutrition labelling notes that packaging with a total surface area under 100 square centimetres doesn't need to display an NIP, although an energy statement is still required where a sugar-free or energy claim is made.

So the absence of a calorie figure tells you something in itself. A brand that voluntarily prints a full panel is a brand willing to be compared.

kcal or kJ? Same energy, very different-looking number

Where an NIP is required, HPB specifies that the energy value must be given in kcal, kJ, or both — alongside protein, fat and carbohydrate in grams, plus any nutrient that is the subject of a claim.

Kilocalories (kcal) are what most Singaporeans mean by "calories". Kilojoules (kJ) are the metric unit for the same thing, and the standard conversion is roughly 4.2 kJ to 1 kcal. That matters because a snack listed at 630 kJ sounds like a lot and a snack listed at 150 kcal sounds modest — and they are the same snack. If a packet only shows kJ, divide by about 4.2 before you judge it.

"Low calorie" is a regulated claim, and most snacks can't make it

This is where the label gets genuinely useful. HPB's guide sets numerical criteria a product must meet before it may use an energy claim. For solid foods:

  • "Energy free" / "Calorie free" — no more than 1 kcal per 100 g, or 5 kcal per serving.
  • "Low energy" / "Low calorie" / "Lite in energy" — no more than 50 kcal per 100 g for most foods (100 kcal per 100 g for bread spreads; 8 kcal per 100 ml for ready-to-drink beverages).
  • "Less calorie" / "Reduced energy" — at least 25% less energy than a stated reference food.
  • "Source of energy" — at least 100 kcal per serving. Note this is a claim about having more energy, not less.

Read that second one again. Fifty kilocalories per 100 grams is a very low bar to clear — it is roughly the territory of soups, jellies and watery foods. Dry snacks such as crisps, biscuits and crackers typically sit several times higher, because removing water concentrates everything. In practice, a crunchy packaged snack that legitimately calls itself "low calorie" is close to a contradiction in terms.

"Reduced calorie" is a different and much weaker signal. It only means 25% less than whatever reference product the manufacturer chose. A quarter off something very energy-dense is still energy-dense.

So how many calories should a snack be?

There is no official per-snack number, and be sceptical of anyone who quotes one as though there were. What HPB does publish, via HealthHub, is an average recommended daily intake of about 2,200 kcal for men and 1,800 kcal for women — figures based on average weight and activity levels, and meant to be adjusted for your own age, height and how much you move.

Work backwards from there rather than memorising a rule. If three meals account for most of your day, a snack that lands somewhere around 100–200 kcal usually fits without much thought. One that lands at 400 kcal is not forbidden — it is simply a meal-sized decision wearing snack packaging, and worth making deliberately.

HealthHub also makes a point worth repeating: the quality of those calories matters, not only the count. Hitting a calorie target on cake and wine still leaves you short on fibre, vitamins and minerals.

The number that predicts overeating better than the total

If you only change one habit, change this one: look at kcal per 100 g, not kcal per packet.

Energy density — calories per gram — is one of the better-evidenced levers in appetite research. In a crossover trial published in Obesity, Williams, Rolls and colleagues served 46 women lunches in which the energy density and the portion size of the main dish were varied independently. Raising energy density from 1.25 to 1.66 kcal per gram increased what participants ate by about 153 kcal. Increasing the portion size increased intake by about 40 kcal. Both mattered — but the denser food mattered considerably more.

The practical translation: two snacks can show a similar figure per serving while being very different foods, because one "serving" is 20 g and the other is 35 g. Per 100 g is the only basis on which two packets are actually comparable. (We went deeper on that trap in per serving or per 100 g.)

A ten-second check at the shelf

  1. Find the energy row. If it's in kJ only, divide by about 4.2.
  2. Read the per 100 g column, not per serving.
  3. Check whether the serving size on the panel matches what you would realistically eat in one sitting.
  4. Treat "light" and "reduced" as claims with definitions, not as compliments.
  5. Then look past energy entirely — at protein, fibre, sodium and saturated fat — because those decide whether the snack holds you until dinner. The Healthier Choice Symbol is a useful shortcut when it's present.

If you want to compare against typical Singapore foods rather than guess, HPB's Singapore Food Insights Database lets you search and compare nutritional composition for food and drinks sold here.

Where HexaCrunch fits

We make baked brown-rice crackers with cricket protein, and we print the full panel on every pack — per serving and per 100 g — precisely so you can run the comparison above. We are not going to claim they are "low calorie"; as you now know, virtually no dry cracker can honestly say that. What we will say is that the calories come with a meaningful amount of protein and wholegrain fibre attached, which is the part that decides whether you're reaching for a second packet at 4pm. If you'd like to see the numbers for yourself, the Try-All 3-Pack is the easiest place to start.

Sources

Back to blog