Bell peppers are one of the most versatile vegetables in the kitchen, but their nutrition is not the same in every color. A red pepper carries more vitamin C than a green one, while yellow peppers can be even higher in vitamin C gram for gram. This Bell Nutrition Calculator helps you estimate calories, carbohydrates, protein, fiber, sugar, fat, and vitamin C for any serving size of raw bell pepper.
Just enter the amount you plan to use, choose the unit (grams, ounces, cups, or whole medium peppers), pick the color, and hit Calculate. The tool converts your measure into grams and scales the nutrient values accordingly. You can also test the effect of multiple servings, which is useful when you are cooking for a family or meal-prepping a batch of stir-fry.
Whether you are tracking macros, managing blood sugar, or simply curious how a red pepper compares with a green one, this calculator gives a fast, practical answer in seconds.
🥗 Bell Pepper Nutrition Calculator
Estimate calories, macros, and vitamin C for raw bell peppers by weight or serving size.
Step-by-Step Guide
Using the calculator takes about ten seconds:
- Enter the amount of bell pepper you plan to eat or cook with.
- Select the unit that matches your scale, measuring cup, or recipe.
- Choose the color of the pepper — red, green, yellow, or orange.
- Adjust the Servings field when calculating for a family meal or meal-prep batch.
- Press Calculate to see calories, macros, and vitamin C, or Reset to clear the inputs.
Quick tip: the preset buttons (100 g, 1 medium, 1 cup) give you a fast starting point; you can fine-tune the amount afterwards.
How the Calculation Works
The calculator uses reference values per 100 grams of raw bell pepper from USDA FoodData Central and scales them linearly by total weight. Two formulas do all the work:
grams = amount × unit factor × servings
nutrient value = per-100 g value × (grams ÷ 100)
Unit factors are 1 for grams, 28.35 for ounces, about 149 g for a chopped cup, and about 119 g for a medium pepper. Estimated calories are then cross-checked with the Atwater factors (4 kcal per gram of protein or carbohydrate, 9 kcal per gram of fat) so the macro bars stay consistent with the calorie total. Because the edible flesh of a bell pepper is fairly uniform, linear scaling gives accurate results across normal portion sizes.
Nutrition Reference Table
Values per 100 g of raw bell pepper, rounded for a typical retail mix:
| Nutrient | Red | Green | Yellow | Orange |
|---|---|---|---|---|
| Calories (kcal) | 31 | 20 | 27 | 31 |
| Carbohydrates (g) | 6.0 | 4.6 | 6.3 | 6.0 |
| Fiber (g) | 2.1 | 1.7 | 1.0 | 2.0 |
| Sugars (g) | 4.2 | 2.4 | 3.7 | 4.0 |
| Protein (g) | 1.0 | 0.9 | 1.0 | 1.0 |
| Fat (g) | 0.3 | 0.2 | 0.2 | 0.2 |
| Vitamin C (mg) | 127.7 | 80.4 | 183.5 | 97.0 |
Worked Examples
Example 1: 150 g of red bell pepper. Grams = 150, factor = 1.5. Calories = 31 × 1.5 ≈ 46.5 kcal. Vitamin C = 127.7 × 1.5 ≈ 192 mg.
Example 2: 1 medium green pepper (about 119 g). Grams = 119, factor = 1.19. Calories = 20 × 1.19 ≈ 24 kcal. Carbohydrates = 4.6 × 1.19 ≈ 5.5 g.
Example 3: 1 cup of chopped yellow pepper (about 149 g). Grams = 149, factor = 1.49. Calories = 27 × 1.49 ≈ 40 kcal. Vitamin C = 183.5 × 1.49 ≈ 273 mg — a single cup already covers several times the daily requirement.
When to Use This Calculator
This tool is handy for macro tracking with apps like MyFitnessPal, low-carb and keto meal planning, vitamin C intake monitoring, and portioning vegetables for school lunches or family dinners. It is also a quick teaching aid for nutrition classes because it makes the difference between colors immediately visible.
Tips & Best Practices
- Weigh peppers after removing the stem, seeds, and white pith if you want numbers for the part you actually eat.
- For meal prep, weigh one pepper and multiply by the batch size instead of weighing every pepper.
- If you track net carbs, read the Net carbs row — the calculator subtracts fiber from total carbohydrates automatically.
- Stick with raw peppers here. Cooking changes water content and degrades a large share of the vitamin C.
Color and ripeness matter: green peppers are unripe fruit. As a pepper ripens it gets sweeter and its vitamin C profile changes, which is exactly why the four colors produce different results in the calculator.
Accuracy & Limitations
Nutrient values come from USDA food composition databases, but individual peppers vary with variety, growing conditions, season, and ripeness. Medium-pepper weight (about 119 g) is an average; a "medium" can range from roughly 90 g to 150 g at the store. For the most accurate tracking, weigh the actual pepper on a kitchen scale instead of relying on the piece count.
Frequently Asked Questions
Why does my whole pepper weigh more or less than 119 g? Size categories are averages. Varieties differ, and one market's "medium" may be another's "large." Weighing the fruit is always the most precise route.
Are the results the same for cooked peppers? No. Heat removes water and breaks down vitamin C, so calorie density per gram rises slightly while vitamin C falls sharply. This calculator assumes raw, uncooked fruit.
Which color is the most nutritious? Yellow peppers lead in vitamin C, while red peppers are also rich in vitamin A and antioxidants. All four are excellent low-calorie sources of fiber and water.
Where do the nutrient numbers come from? They are based on U.S. Department of Agriculture reference data. You can explore the original entries on USDA FoodData Central or read a detailed botanical overview on Wikipedia.