One cup of cooked lentils contains about 230 calories. That’s true across most varieties, whether you’re cooking brown, green, red, or yellow lentils. Along with those calories, you get nearly 18 grams of protein, close to 16 grams of fiber, and less than 1 gram of fat, making lentils one of the most nutrient-dense foods per calorie you can eat.
Calories by Serving Size
Most people cook lentils by the cup, but serving sizes vary depending on whether lentils are the main dish or a side. Here’s how the calories scale:
- 1 cup cooked (198g): 230 calories
- ½ cup cooked (99g): 115 calories
- 100g cooked: roughly 116 calories
These numbers apply to plain boiled lentils without added oil, butter, or sauces. A tablespoon of olive oil in your lentil soup adds about 120 calories on its own, so the cooking method matters as much as the portion.
Dry vs. Cooked: Getting the Count Right
If you’re measuring lentils before cooking, the calorie math changes significantly. Dry lentils are calorie-dense because all that water weight hasn’t been added yet. One cup of dry lentils contains roughly 680 calories, but it yields about 2 to 2.5 cups once cooked. To get a single cup of cooked lentils, start with about half a cup of dry.
The exact expansion depends on the variety. Brown and green lentils roughly triple in volume (about 2.5 times their dry weight). Red and yellow lentils expand slightly less, around 2.3 times, because they break down more during cooking. Black and French (Puy) lentils hold their shape well and expand about 2.6 times. If you’re tracking calories carefully, weigh your lentils after cooking for the most accurate count.
Do Different Varieties Have Different Calories?
The calorie difference between lentil varieties is minimal. Whether you choose brown, green, red, yellow, or black lentils, you’ll land in the 220 to 235 calorie range per cooked cup. The real differences between varieties show up in texture, cooking time, and how they behave in recipes rather than in their calorie content.
Red and yellow lentils cook fastest (15 to 20 minutes) and dissolve into a creamy consistency, which makes them ideal for soups and dals. Green and brown lentils hold their shape and work better in salads. Black lentils (sometimes called beluga lentils) stay firm and have a slightly earthier flavor. Nutritionally, they’re all remarkably similar.
Full Macronutrient Breakdown
What makes lentils stand out isn’t just their calorie count. It’s what those calories are made of. Per cup of cooked lentils:
- Protein: 17.9 grams
- Carbohydrates: 39.8 grams
- Fiber: 15.6 grams
- Fat: 0.8 grams
That protein content is unusually high for a plant food. A cup of lentils delivers roughly the same amount of protein as 2.5 eggs. The fiber count is equally impressive: 15.6 grams covers more than half the daily recommended intake for most adults. And because so much of the carbohydrate content is fiber, the net digestible carbs are closer to 24 grams per cup.
Lentils also pack significant micronutrients. A single cup provides about 30% of your daily iron needs and 30% of your daily folate. They’re a solid source of potassium, magnesium, and B vitamins as well.
How Lentils Compare to Other Staples
Calorie for calorie, lentils deliver far more protein and fiber than most common carbohydrate staples. One cup of cooked white rice contains about 200 to 240 calories, similar to lentils, but with only 4 to 5 grams of protein and less than 1 gram of fiber. Quinoa is closer to lentils nutritionally, with about 220 calories per cooked cup and 8 grams of protein, but lentils still have more than double quinoa’s protein and significantly more fiber.
Compared to other legumes, lentils are in the same neighborhood as chickpeas (about 270 calories per cup) and black beans (about 225 calories per cup). The advantage lentils have over most other beans is convenience: they don’t require soaking and cook in 15 to 30 minutes depending on the variety.
Why Lentils Keep You Full Longer
Lentils have an unusually low glycemic index compared to other carbohydrate-rich foods. Plain boiled lentils score around 25 on the glycemic index scale, which is well within the “low” category (anything under 55). For comparison, white rice scores around 73 and white bread around 75. This means lentils cause a much slower, more gradual rise in blood sugar after eating.
The reason comes down to their physical structure. Lentil cells have intact cell walls that act as a barrier, slowing down how quickly your body can access and break down the starch inside. Combined with their high fiber and protein content, this means lentils digest slowly, keeping you satisfied for hours after a meal.
Processing changes this picture. When lentils are ground into flour or heavily processed, they lose much of that structural advantage. Spray-dried lentil flour, for example, has a glycemic index around 66, nearly triple the value of whole boiled lentils. Keeping lentils whole or lightly mashed preserves most of their blood sugar benefits.
Calorie Tips for Common Lentil Dishes
Plain boiled lentils are the baseline, but most people eat them as part of a recipe. A typical bowl of lentil soup runs 250 to 350 calories depending on added ingredients. Dal (Indian-style lentils) cooked with ghee or oil usually falls between 200 and 300 calories per cup. A lentil salad with olive oil dressing and vegetables might come to 300 to 400 calories per generous serving.
If you’re using lentils to manage calories, they’re one of the best foods for volume eating. Their high water content after cooking, combined with all that fiber and protein, means you get a large, filling portion for a relatively modest calorie cost. Swapping half the ground meat in a bolognese or chili for cooked lentils cuts calories substantially while keeping the dish satisfying.