Peppers are a staple in kitchens around the world, and they bring far more to a dish than flavor. Most fresh varieties are low in calories yet rich in vitamin C, vitamin A, fiber, and potassium. This Pepper Nutrition Calculator estimates the nutrient profile of raw peppers based on the variety and portion you enter, whether you are chopping bell peppers for a salad, adding jalapeños to tacos, or using serranos in salsa.
Select a pepper type, enter your serving size in grams, ounces, chopped cups, or whole medium peppers, and the calculator returns a detailed breakdown of calories, carbohydrates, protein, fat, fiber, sugars, vitamin C, vitamin A, and potassium. The results include both your portion amounts and the per-100 g reference values, so you can compare servings and adjust recipes quickly. This makes the tool useful for meal prep, macronutrient tracking, and healthy eating plans.
🌶️ Pepper Nutrition Calculator
Estimates for fresh raw peppers based on USDA reference values.
How to Use This Tool
Start by selecting the pepper variety that matches what you are using — the dropdown includes eight common types ranging from sweet bell peppers to habaneros. Next, enter your portion in the amount field and choose the matching unit: grams, ounces, chopped cups, or whole peppers. If you are measuring a whole pepper, the calculator applies an average weight for that variety; for example, one medium red bell pepper is treated as about 119 g, while one whole jalapeño is about 14 g.
Click Calculate to generate a full nutrition breakdown for your portion. The results table shows each nutrient two ways: the total in your serving and the per-100 g reference value, which makes comparing varieties straightforward. The quick-fill buttons below the inputs are handy shortcuts for common servings such as a medium bell pepper, one jalapeño, 100 g of red bell pepper, or a cup of cayenne. Use the Reset button to clear the results and start a new comparison.
Tip: Weighing your peppers gives the most accurate numbers — whole-pepper values in this tool are averages, and individual peppers can be 10–20% larger or smaller.
The Math Behind It
All nutrient data in this calculator are per-100 g values for raw peppers, sourced from USDA FoodData Central reference entries. The calculator performs two steps. First, it converts your portion to grams:
- Grams: no conversion needed
- Ounces to grams: multiply by 28.3495
- Chopped cups to grams: multiply by 85 (an average cup weight)
- Whole peppers to grams: multiply by the variety's average pepper weight
Once the serving size is in grams, each nutrient is scaled with the simple ratio: nutrient in portion = (per-100 g value × grams) ÷ 100. For instance, if raw red bell pepper has 127.7 mg of vitamin C per 100 g, a 50 g serving contains 127.7 × 50 ÷ 100 = 63.85 mg.
Example: A 150 g serving of red bell pepper delivers 31 × 1.5 = 46.5 kcal, 6.0 × 1.5 = 9.0 g of carbs, and 127.7 × 1.5 ≈ 192 mg of vitamin C — roughly twice the recommended daily allowance for most adults in a single serving.
Worked Examples
Example 1: Half a cup of chopped green bell pepper. Half a cup is about 42.5 g, so the scale factor is 0.425. The serving provides about 20 × 0.425 ≈ 8.5 kcal, 4.6 × 0.425 ≈ 2.0 g of carbs, and 80.4 × 0.425 ≈ 34 mg of vitamin C.
Example 2: Two whole jalapeños. One jalapeño averages 14 g, so two are roughly 28 g (factor 0.28). That serving gives about 29 × 0.28 ≈ 8 kcal, 2.8 × 0.28 ≈ 0.8 g of fiber, and 248 × 0.28 ≈ 69 mg of potassium — a very light addition to tacos or salsa, nutritionally speaking.
Example 3: Four ounces of serrano peppers. Four ounces converts to 4 × 28.3495 ≈ 113.4 g (factor 1.134). The portion provides about 32 × 1.134 ≈ 36 kcal, 6.7 × 1.134 ≈ 7.6 g of carbs, and 1.7 × 1.134 ≈ 1.9 g of protein. Note how a large raw weight can still be low in calories — typical of fresh chiles.
Tips & Best Practices
- Weigh before you chop: cutting a pepper removes the stem, seeds, and core, so a weighed whole pepper overestimates edible weight. Weigh the trimmed, edible portion for meal-prep accuracy.
- Use the per-100 g column to compare varieties: it removes portion-size differences, so you can see at a glance that red bells are far higher in vitamin C than green bells.
- Account for chop size: a loosely packed cup of large chunks weighs less than a tightly packed cup of fine dice. The 85 g-per-cup estimate is a middle-ground average.
- Remember heat is separate from nutrition: capsaicin, the compound behind chile heat, has negligible calorie or macronutrient impact — a ghost pepper is hot, not heavy.
Reference Data (per 100 g Raw)
The table below summarizes the core values used by the calculator for each variety.
| Pepper | Calories | Carbs (g) | Fiber (g) | Vit C (mg) | Vit A (µg RAE) | Potassium (mg) |
|---|---|---|---|---|---|---|
| Red bell | 31 | 6.0 | 2.1 | 127.7 | 157 | 211 |
| Green bell | 20 | 4.6 | 1.8 | 80.4 | 18 | 175 |
| Yellow bell | 27 | 6.3 | 1.0 | 183.5 | 30 | 212 |
| Poblano | 20 | 4.1 | 1.7 | 80.4 | 69 | 233 |
| Jalapeño | 29 | 6.5 | 2.8 | 43.7 | 54 | 248 |
| Serrano | 32 | 6.7 | 3.7 | 44.9 | 59 | 292 |
| Cayenne | 40 | 8.8 | 1.5 | 76.4 | 240 | 322 |
| Habanero | 40 | 9.0 | 2.0 | 86.5 | 150 | 300 |
Vitamin A is shown in micrograms of retinol activity equivalents (µg RAE). Both vitamins are heat-sensitive, so raw peppers are the best source.
Frequently Asked Questions
Why do red and green bell peppers have such different numbers? Color reflects ripeness. Green bells are picked earlier; red, yellow, and orange bells stay on the plant longer, which raises sugar, beta-carotene, and vitamin C — which is why red bells have roughly 60% more vitamin C than green ones.
Are these numbers for raw or cooked peppers? These are raw values only. Cooking evaporates water and can degrade heat-sensitive vitamins, especially vitamin C, so cooked peppers test differently per 100 g.
Does spiciness change the nutrition? Not meaningfully. Scoville ratings reflect capsaicin concentration, which contributes essentially no calories. A habanero and a bell pepper of similar weight have comparable energy content.
Can I use this for dried or powdered peppers? No — dried chiles and chili powder are far more calorie- and nutrient-dense per gram because water is removed. Look for separate entries for dried products in the USDA database.
Nutrition disclaimer: These are estimates for fresh raw peppers and will vary with growing conditions, ripeness, and individual produce. Values are rounded. For clinical or medical nutrition decisions, consult a registered dietitian or use lab-tested food analysis.
Additional Resources
For deeper dives, the USDA FoodData Central database is the authoritative source behind these figures. The NIH vitamin C fact sheet explains recommended intakes and health roles. For heat levels and history, the Wikipedia article on Capsicum is a solid overview.