Fresh peppers are some of the lowest-calorie vegetables you can add to a meal, but “a slice” can weigh anywhere from 5 to 20 grams depending on how you cut it. This pepper calories per slice calculator turns your serving into a quick calorie estimate using typical USDA values for green, red, yellow, orange bell peppers and jalapeños. It is designed for meal prep, calorie tracking, and anyone who wants a quick macro snapshot without weighing a whole batch.
Choose your pepper variety, enter the number of slices, and either use one of the common slice-weight presets or type in the exact weight from a kitchen scale. The tool then shows total calories, calories per slice, and the estimated protein, carbohydrate, and fat content for your portion.
Because peppers are mostly water and fiber, the numbers are small — but they can add up if you eat several servings a day. This calculator makes it easy to keep your log accurate and consistent.
🫑 Pepper Calories Per Slice
Estimate the calories in fresh pepper slices using your variety, slice count, and slice weight.
How to Use This Tool
The calculator works best when you know approximately how much one slice weighs. Start by picking your variety in the dropdown, then enter the number of slices you plan to eat. If you don’t have a scale, use the quick buttons for a thin strip (5 g), a typical ring (10 g), or a thick chunk (15 g). These are reasonable averages: a medium bell pepper usually yields 8–10 rings, and a whole medium pepper weighs around 119 g. If you do have a kitchen scale, weigh a single slice and enter that value for the most accurate result.
Click Calculate to see the total calories and macro breakdown. Use Reset to restore the defaults if you want to start a new comparison.
How It Works
The calculation uses the standard nutrition equation:
For example, a red bell pepper has about 31 kcal per 100 g. If one slice weighs 10 g, that slice provides 10 × 31 ÷ 100 = 3.1 kcal. Multiply that by the number of slices to get your total.
Macros are derived the same way from typical USDA FoodData Central values. Since peppers are not a significant source of calories, the main dietary benefit is their vitamin C, vitamin A, and antioxidant content rather than energy density. For a deeper macro view, see USDA FoodData Central.
Reference Table: Calories & Macros by Variety
| Variety (raw) | kcal / 100 g | Protein (g) | Carbs (g) | Fat (g) |
|---|---|---|---|---|
| Green bell | 20 | 0.9 | 4.6 | 0.2 |
| Red bell | 31 | 1.0 | 6.0 | 0.3 |
| Yellow bell | 27 | 1.0 | 6.3 | 0.2 |
| Orange bell | 31 | 1.0 | 7.2 | 0.2 |
| Jalapeño | 29 | 0.9 | 6.5 | 0.4 |
Values are rounded from USDA reference data and can vary with ripeness, growing conditions, and water content. Treat them as helpful estimates rather than laboratory-precise numbers.
Worked Examples
Salad topping. You add 8 medium green bell rings to a salad, and each ring weighs about 10 g. Total pepper weight = 80 g. Green bell pepper is 20 kcal/100g, so total calories = 80 × 20 ÷ 100 = 16 kcal, or 2.0 kcal per ring.
Stir-fry batch. You meal-prep 5 lunch boxes with 12 thick red chunks each. Each chunk is 15 g, so one lunch contains 180 g of pepper. Red bell is 31 kcal/100g: 180 × 31 ÷ 100 = 55.8 kcal per lunch. Per chunk that’s 4.65 kcal.
Snack plate. You slice 10 jalapeño rings at roughly 4 g each for a low-calorie snack. Total = 40 g. At 29 kcal/100g: 40 × 29 ÷ 100 = 11.6 kcal total, about 1.2 kcal per ring.
Common Mistakes to Avoid
Assuming all peppers have the same calories. Green bell peppers are noticeably lower in calories than red or yellow peppers because red peppers stay on the vine longer and develop more sugars. Always check your variety first.
Using “handful” or “slice” without a weight. A thick slice can be 3–4 times heavier than a thin strip. If you log by weight, the calorie difference can be meaningful even if the numbers look small.
Forgetting that cooking changes weight. This calculator is for raw pepper slices. Roasting or sautéing removes water, so the same number of grams after cooking represents more pepper by raw-equivalent weight. Oil or butter added during cooking also adds calories that aren’t included here.
Frequently Asked Questions
How many calories are in a whole bell pepper? A typical medium bell pepper weighs around 119 g. Using the tool’s per-100g values, a medium green pepper is about 24 kcal, while a medium red pepper is about 37 kcal. Actual size varies, so weigh it if you’re logging precisely.
Do different colors really have different calories? Yes. Ripening converts some structural carbs into sugars, which raises the calorie density slightly. Red and orange peppers are sweeter and a bit more caloric than green peppers.
Can I eat peppers freely on a diet? You can eat large volumes for very few calories compared with most processed snacks, but your tracker still needs an entry. For other produce comparisons, you might like broccoli calories per cup or bell pepper protein per 100g.
What about roasted or charred peppers? The base calorie value is similar, but any oil, salt, or marinade added will change the numbers. Enter the prepared weight and add your cooking oil separately.