5 foods under 300 calories per 100 g
At 250 kcal per 100 g, a 40 g misjudgement costs 100 kcal. Forty grams is one extra slice of bread, or a generous rather than modest crumble of feta, or half an avocado’s difference between “medium” and “large”. Do it twice a day and a 500 kcal deficit quietly becomes a 300 kcal deficit.
That is what changes in this band. The food is not the problem — it is good food, most of it. The estimating is.
| Food | kcal per 100 g | Fat |
|---|---|---|
| Avocado | ~160 | 14.7 g |
| Hummus | ~166 | 9.6 g |
| Salmon, Atlantic, cooked | ~206 | 12.3 g |
| Wholemeal bread | ~247 | 3.4 g |
| Feta | ~264 | 21.3 g |
Also here: ricotta (174), tempeh (192), roasted chicken thigh with skin (229), part-skim mozzarella (254), white bread (266), cooked 85/15 beef mince (250), bagel (257), pitta (275), paneer (~290), dried dates (282) and raisins (299).
Fat is why
Everything in this band is 10 to 25 per cent fat, and fat is 9 kcal per gram against 4 for protein and carbohydrate. There is no way to be dense without it — and nothing in the bands below could be dense, because they were mostly water.
Bread is the exception that proves it: at 3.4 g of fat it gets to 247 kcal by being dry instead. Water is the only real diluter, and a loaf has very little. (Calories versus kilocalories covers the units these figures are in.)
The portion mismatch cuts both ways
Per-100 g numbers are a comparison tool. In this band they stop describing anything you would serve, and they mislead in opposite directions:
| Food | 100 g looks like | A real portion | Portion kcal |
|---|---|---|---|
| Wholemeal bread | 2½ slices | 2 slices (~70 g) | ~173 |
| Feta | a block | a crumble (~30 g) | ~79 |
| Avocado | ⅔ of one | half (~70 g flesh) | ~112 |
| Hummus | a tub | 2 tbsp (~45 g) | ~75 |
| Salmon | a small fillet | a fillet (~150 g) | ~309 |
Bread’s figure overstates what you eat; cheese’s badly understates how easily you pass it. Salmon’s is the only one where 100 g is roughly a portion, and even there most fillets are half again as big.
Which is the honest case for weighing things — not forever, and not everything. A week with a cheap kitchen scale teaches you what your own portions weigh, and after that you can estimate the same foods within ten per cent for the rest of your life. It is a one-off cost, not a habit.
Where the band earns its calories
Nothing here is worth avoiding, and three of the five are among the better things you can eat.
- Avocado — 6.7 g of fibre per 100 g and mostly monounsaturated fat. A whole one is 230–320 kcal depending on size, which is a real chunk of a day and usually worth it.
- Salmon — twice the calories of white fish at about 105 cooked, and the difference buys omega-3s that cod does not have. Both are good; they are not interchangeable in either direction.
- Hummus — chickpeas and tahini, so fibre and protein alongside the fat. The trap is that it is eaten with something: 45 g of hummus is 75 kcal, and the pitta it arrives on is 275.
Feta and paneer are the ones to weigh rather than pour. Both are excellent at 30 g and expensive at 100.
The compounding version
The reason this band matters more than the ones below is that its errors do not stay small. Mis-estimating a vegetable by 50 g costs 12 kcal. Mis-estimating cheese by 50 g costs 130. Over a month of eating, that is the difference between a deficit that works on paper and one that works on the scale — which is most of why the scale disagrees with you in week three.
The next rung up has the largest single error in food tracking on it, and it is not about estimating at all.
The rest of the ladder
Under 5 · under 10 · under 20 · under 30 · under 50 · under 100 · under 200 · under 300 · under 400 · under 500
Figures are typical values from USDA FoodData Central and product labels, and vary by variety, brand and preparation. General information, not medical advice.