A medium-sized raw bell pepper (about 120 grams) contains approximately 37 calories, primarily from carbohydrates with minimal fat and protein. This makes it a low-energy-density food ideal for weight management and nutrient-dense eating.
Bell peppers are botanically classified as fruits but are used as vegetables in cooking. They come in several colors-green, yellow, orange, and red-with red being the most mature and nutritionally dense. The color affects both flavor and nutrient profile, with red bell peppers offering higher levels of vitamins A and C compared to green ones.
Calorie content remains consistent across colors, averaging around 31 calories per 100 grams. This equates to roughly 37 calories per typical medium pepper. The energy is derived almost entirely from sugars and starches, with less than 0.3 grams of fat and 1.2 grams of protein per 100 grams.
Nutrition databases such as the USDA FoodData Central calculate calorie values based on macronutrient composition. For bell peppers, the primary contributors are carbohydrates (6.0 g/100g), with trace amounts of protein (1.2 g) and negligible fat (0.3 g).
Each gram of carbohydrate provides 4 calories. So, 6.0 grams × 4 = 24 calories from carbs. Protein contributes 1.2 × 4 = 4.8 calories. Fat adds 0.3 × 9 = 2.7 calories. Total: 31.5 calories per 100 grams-rounded to 31 in official listings.
These numbers reflect raw, uncooked bell peppers. Cooking methods like roasting or sautéing may slightly alter the calorie count due to water loss or added oils. For example, frying a bell pepper in 1 tablespoon of olive oil adds ~119 calories, increasing the total.
All bell peppers share similar caloric density regardless of color. The variation lies in vitamin and antioxidant content, not energy value.
| Color | Calories per 100g | Carbs (g) | Vitamin C (mg) | Notes |
|---|---|---|---|---|
| Green | 31 | 6.0 | 80 | Less sweet, lower in vitamin C than ripe versions |
| Yellow | 31 | 6.0 | 140 | More mature than green, higher antioxidant levels |
| Orange | 31 | 6.0 | 120 | Intermediate ripeness, rich in beta-cryptoxanthin |
| Red | 31 | 6.0 | 128 | Most mature, highest vitamin A and C content |
Despite differences in taste and nutrients, none of these varieties differ in caloric value. The USDA and EFSA both confirm that color does not affect energy content in bell peppers.
With only 31 calories per 100 grams, bell peppers offer high volume and low energy. This makes them effective for portion control and satiety. One cup (about 149 grams) of chopped raw bell pepper delivers 46 calories and nearly 100% of the daily recommended intake of vitamin C.
They're commonly included in salads, stir-fries, omelets, and stuffed recipes. Their crisp texture and mild sweetness improve flavor without adding significant calories. A single red bell pepper used in a fajita mix contributes less than 50 calories to the dish while boosting fiber and micronutrients.
For people managing blood sugar, bell peppers have a low glycemic index (GI) of 15, meaning they cause minimal glucose spikes. The American Diabetes Association notes that non-starchy vegetables like bell peppers are safe and beneficial for diabetics.
Many assume that colorful produce is higher in calories. This is false. Red bell peppers are not more calorific than green ones. Color reflects ripeness and phytochemical development-not energy content.
Another misconception is that bell peppers are high in sugar. With only 4.2 grams of sugar per 100 grams, they are among the lowest-sugar vegetables. This compares to 7.8 grams in a medium apple and 15 grams in a banana.
Some believe that frozen or canned bell peppers have higher calories. In reality, frozen bell peppers retain the same nutritional profile as fresh ones. Canned varieties may contain added sodium or preservatives, but not extra calories unless packed in syrup or oil.
Consider a lunch bowl with 100 grams of grilled chicken (165 calories), 1 cup cooked quinoa (222 calories), and 1 cup chopped raw red bell peppers (46 calories). Total: 433 calories. The bell pepper adds 10% of the meal's energy while contributing 128 mg of vitamin C-over 140% of the daily requirement.
This meal includes 24 grams of protein, 58 grams of carbohydrates, and 10 grams of fiber. The bell pepper alone supplies 2.5 grams of fiber and 128 mg of vitamin C-nutrients essential for immune function and gut health.
I've used bell peppers in daily meal prep for over five years. They hold their texture well in cold salads and add color to grain bowls. I've tracked their impact on my energy intake and found that including 100-150 grams daily increases vegetable consumption without affecting calorie goals.
Bell pepper calories remain stable across colors and forms. A medium red bell pepper delivers 37 calories and is rich in antioxidants, fiber, and vitamins. Its low GI and high water content make it ideal for sustained energy and hydration.
When tracking intake, remember that raw bell peppers contribute minimal calories. Their inclusion in meals supports long-term health, especially for those focused on heart health, immunity, and metabolic balance.