Low-Calorie Snacks for Weight Loss

A good low-calorie snack does one job: it controls hunger between meals for as few calories as possible, so you do not arrive at the next meal ravenous and overeat. The foods that do this best are not the lowest-calorie foods on the shelf — they are the ones that deliver the most fullness per calorie. That comes from three levers: high water content and fiber (which add satiating volume and weight without many calories^[4]), and some protein (the most satiating macronutrient, which blunts later eating at matched calories^[1][3][8]). The honest framing up front: snacking is not required for weight loss, and an extra snack you did not need is just extra calories. A snack only helps if it prevents a larger calorie surplus later — the classic afternoon-hunger spiral into dinner overeating. This guide explains what makes a snack genuinely low-calorie-effective, then gives a grouped, practical list of snacks under roughly 100 and 150 calories with approximate counts. For the protein-first companion to this guide, see our high-protein snacks for weight loss evidence review.

What makes a good low-calorie snack

“Low-calorie” alone is not the goal — a few crackers are low-calorie too, and they leave you hungry an hour later. The useful target is fullness per calorie. Three properties drive it. Water bound inside food adds weight and volume that physically distends the stomach and triggers satiety, without adding calories; that is why a watery food fills you far more than a dense one of the same calories^[5][6]. Fiber adds bulk, slows gastric emptying, and slows digestion. And protein is the most satiating macronutrient per calorie, increasing fullness hormones and reducing how much you eat at the next meal^[1][3][8]. The best low-calorie snacks stack at least two of these — vegetables-and-hummus (water + fiber + a little protein), fruit (water + fiber), nonfat Greek yogurt (protein), edamame (protein + fiber).

The underlying principle is energy density — calories per gram. People tend to eat a fairly fixed weight of food per day rather than a fixed number of calories, so lowering the energy density of what you eat lowers calories taken in without increasing hunger. In Bell’s 1998 controlled-feeding study^[7], women fed lower-energy-density diets “maintained the weight of food consumed” and ate significantly fewer calories with no change in reported fullness. A low-calorie snack is just a small application of that idea: pick foods that weigh a lot and fill you up for few calories.

Why a snack works (and the catch)

The cleanest snack-specific evidence comes from afternoon-snack appetite trials. In the Ortinau 2013 randomized trial^[1], an afternoon high-protein Greek-yogurt snack “led to reductions in afternoon hunger” and delayed when participants chose to eat dinner, versus energy-matched higher-fat snacks. The companion Douglas 2013 dose-response trial^[2] compared 5 g, 14 g, and 24 g protein yogurt snacks (all energy-matched) and found the higher-protein snacks produced greater fullness and a longer delay before the next meal. Protein is not the only lever — in Nguyen’s 2012 trial^[9], air-popped popcorn was more satiating than an energy-matched serving of potato chips, because of its greater volume and fiber. The takeaway: a snack that targets fullness can genuinely reduce later eating.

The catch is the obvious one. A snack you eat out of habit, boredom, or because it is in front of you — when you were not actually hungry — adds calories without subtracting any. Snacking only helps weight loss when it prevents a bigger overshoot later. If three planned meals already hold you, you do not need a snack at all.

Low-calorie snacks under ~100 calories

These are the most volume- and satiety-efficient snacks for the calories. Figures are approximate, rounded from USDA FoodData Central composition data and product-label ranges — use them as planning numbers, not lab values.

• Raw vegetables (1-2 cups: celery, cucumber, bell pepper, carrots, cherry tomatoes) — ~15-50 kcal — ~90-95% water plus fiber; the highest volume per calorie of any snack.
• Plain nonfat Greek yogurt (1 cup, ~170 g) — ~100 kcal, ~17 g protein — the snack format with the most appetite-RCT evidence behind it^[1].
• Air-popped popcorn (3 cups) — ~90 kcal — high volume and fiber; more satiating than chips at matched calories^[9] (air-popped, not buttered).
• A piece of whole fruit (medium apple, orange, or 1 cup berries) — ~60-95 kcal — water + fiber; eat it whole, not juiced.
• Edamame in the pod (1/2 cup shelled, ~75 g) — ~95 kcal, ~9 g protein + ~4 g fiber — the protein-and-fiber combination in one whole food.
• A cup of broth-based vegetable soup — ~50-100 kcal — the water-in-food effect at its strongest; soup preloads cut total intake in trials^[5][6].
• Low-fat cottage cheese (1/2 cup, ~113 g) — ~80-90 kcal, ~12-14 g protein — slow-digesting and very filling.
• A hard-boiled egg — ~70 kcal, ~6 g complete protein — portable, no prep at snack time.
• Two rice cakes + a thin smear of cottage cheese or a slice of turkey — ~70-90 kcal — crunchy and portion-defined (plain rice cakes alone are low-satiety, so add protein).
• A cup of light/no-sugar gelatin or a sugar-free hot cocoa — ~10-30 kcal — near-zero-calorie volume for a sweet craving.

Low-calorie snacks under ~150 calories

A bit more room buys you the most filling combination of all — protein plus fiber on one plate.

• Vegetables + 2 tbsp hummus — ~120-140 kcal — water and fiber from the veg, a little protein and fiber from the chickpeas; portion the hummus, since it is the calorie-dense part.
• Greek yogurt + 1/2 cup berries — ~150 kcal, ~17-20 g protein + ~3-4 g fiber — the appetite-RCT format^[1] with added fiber.
• Apple + 1 tbsp peanut butter — ~150 kcal — whole fruit fiber plus a measured tablespoon of protein/fat (measure it — nut butter is where this snack runs over).
• Tuna pouch in water (1 pouch, ~74 g) + cucumber slices — ~90-120 kcal, ~16 g protein — one of the highest protein-per-calorie snacks available.
• Roasted chickpeas (1/4 cup, ~40 g) — ~120 kcal, ~6 g protein + ~5 g fiber — a crunchy chip alternative with real satiety.
• A string cheese + a piece of fruit — ~140 kcal — portion-controlled protein plus fiber.
• Two cups air-popped popcorn + a light sprinkle of parmesan — ~110 kcal — high volume with a savory hit.
• Cottage cheese + cherry tomatoes or pineapple — ~110-130 kcal — slow casein protein plus produce.
• Edamame (1/2 cup) + a few cherry tomatoes — ~110 kcal — protein and fiber, almost no prep.
• Turkey or chicken roll-ups (2-3 slices) around bell pepper strips — ~70-100 kcal — lean protein wrapped in crunch.

How to use snacks in a weight-loss plan

• Snack on purpose, not by default. Ask whether you are actually hungry. If three meals hold you, skip the snack — the best low-calorie snack is sometimes none.
• Target the afternoon dip. The afternoon window is where habitual snacking is most likely to be carbohydrate- and fat-dominant and spill into evening overeating^[1] — a planned ~100-150 kcal protein-and-fiber snack there has the most appetite-control evidence.
• Combine water, fiber, and a little protein. Vegetables + hummus, fruit + Greek yogurt, and edamame all hit at least two of the three satiety levers.
• Pre-portion. Eating from the bag defeats a low-calorie snack faster than anything. Plate or pack a single serving.
• Count it in your day. A snack is part of your total calories, not a freebie. Set the target first — run the numbers with our calorie deficit calculator.

Bottom line

• A good low-calorie snack maximizes fullness per calorie — water, fiber, and a little protein — not just a low number on the label.
• Best under ~100 kcal: raw vegetables, plain nonfat Greek yogurt, air-popped popcorn, whole fruit, edamame, broth-based soup, cottage cheese, a hard-boiled egg.
• Best under ~150 kcal: veggies + hummus, Greek yogurt + berries, apple + 1 tbsp peanut butter, tuna pouch + cucumber, roasted chickpeas, string cheese + fruit.
• Watch hidden calories in granola, trail mix, sweetened yogurts, and the oil/nut-butter/coating add-ons that quietly double a snack.
• Snacks are optional. They help only when they prevent overeating later — an unneeded snack is just extra calories. Weight loss still comes down to an overall calorie deficit.

Related research and tools

For the protein-first companion to this guide — ranked by protein-per-calorie with the appetite-RCT evidence — see our high-protein snacks for weight loss evidence review. For the broader strategy of building filling meals around water- and fiber-rich foods, see high-volume, low-calorie foods. To set the calorie target these snacks fit inside, use the calorie deficit calculator, and for the energy-dense snacks worth replacing, see foods to avoid for weight loss.

This article is educational and is not medical or nutritional advice. Snack calorie and nutrient figures are approximate planning values that vary by brand and portion; ranges are drawn from USDA FoodData Central and product labels. The satiety and appetite claims are sourced to peer-reviewed randomized trials and reviews indexed in PubMed; the snack-appetite trials (citations 1-2, 9) are short-term studies in healthy adults that demonstrate the satiety mechanism, not a guaranteed weight-loss outcome. Snacking is optional and helps only when it prevents overeating later. Discuss any weight-loss plan with a licensed clinician or registered dietitian. Every primary source cited here was verified against the live PubMed E-utilities API on 2026-06-22.