Pecan Fiber Calculator

Pecans are a rich, plant-based source of dietary fiber, with about 9.6 g of fiber per 100 g of shelled nuts. The Pecan Fiber Calculator turns any portion — grams, ounces, cups of halves or chopped pieces, even individual halves — into a precise fiber count. It also reports the contribution toward the daily reference value, net carbs, and total calories, making it a practical companion for fiber tracking, low-carb meal planning, and general nutrition logging.

Whether you are following a keto diet, managing digestive goals, or just curious about a handful of pecans, this tool gives you instant answers and shows the math step by step. The built-in quick-fill buttons and serving multiplier make it effortless to log snacks, recipes, and meal-prepped portions accurately.

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Pecan Fiber Calculator

Estimate the dietary fiber, net carbs, and calories in your pecan portion.

Amount of pecans

Use decimals for fractions, e.g. 0.5 or 28.35.

Number of servings

serving(s)

If your amount is per serving, this multiplies the total.

Quick fill:

📊 Results

Dietary Fiber—g

Daily Value—%

Net Carbs—g

Calories—kcal

Step-by-step breakdown

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Step-by-Step Guide

Start by entering the amount of pecans you ate or plan to use. Choose the unit that matches how you measure: grams, ounces, cups of pecan halves, cups of chopped pecans, or pecan halves themselves. If your amount is per serving and you are logging more than one serving, set the Number of servings field accordingly — the calculator multiplies the whole portion for you.

Press Calculate Fiber to see four numbers: dietary fiber, Daily Value (DV), net carbs, and calories. The step-by-step breakdown below the results shows exactly how the total was converted to grams and then to fiber and percentage DV.

Tip: For the most accurate log, weigh pecans in grams on a kitchen scale. Cup measurements are convenient but vary by how tightly the pieces pack.

How It Works

The calculator uses USDA nutrient data for raw shelled pecans. Per 100 g, pecans contain about 9.6 g of dietary fiber, 13.9 g of total carbohydrate, and 691 calories. The fiber value is applied as a simple ratio: fiber grams = total grams × 0.096. Net carbs are then calculated as the carbohydrate that remains after subtracting fiber, which is 13.9 − 9.6 = 4.3 g per 100 g.

Daily Value is based on the adult reference intake of 28 g of fiber per 2,000-calorie diet, so it equals fiber grams ÷ 28 × 100. Because the fraction of fiber and calories is constant per gram, the same formulas scale up or down linearly for any portion.

Note: Raw and dry-roasted pecans have very similar fiber content. Flavored or candied products can differ because of added coatings, so check the package label if you are not using plain pecans. If you are also counting energy, our pecan calorie calculator gives a more detailed calorie breakdown.

Worked Examples

Example 1: A 30 g snack. Enter 30 with the unit set to grams and 1 serving. The calculation is 30 g × 0.096 = 2.9 g of fiber, which is about 10% of the DV. This same portion provides roughly 207 calories and about 1.3 g of net carbs.

Example 2: ½ cup of chopped pecans. Select 0.5 with cups (chopped). The calculator converts to about 54.5 g, then computes 54.5 × 0.096 ≈ 5.2 g fiber, about 19% DV, and around 377 calories. Net carbs work out to roughly 2.3 g.

Example 3: 10 pecan halves as a topping. A typical half weighs about 1.5 g, so 10 halves total 15 g. Fiber = 15 × 0.096 = 1.4 g, just 5% of the DV, with about 104 calories. This is a good example of why small portions can still fit into a high-fiber eating plan.

Reference Data

Use the table below for common pecan measurements. Weights for cup and half measures are approximate; these are the values the calculator uses.

Measurement	Approx. weight	Fiber	Net carbs
10 pecan halves	15 g	1.4 g	0.7 g
1 oz (about 19 halves)	28.35 g	2.7 g	1.2 g
¼ cup halves	25 g	2.4 g	1.1 g
⅓ cup chopped	36 g	3.5 g	1.5 g
½ cup chopped	55 g	5.3 g	2.4 g
1 cup halves	99 g	9.5 g	4.3 g
1 cup chopped	109 g	10.5 g	4.7 g
100 g	100 g	9.6 g	4.3 g

Values are rounded to one decimal and are based on the nutrient profile described by USDA FoodData Central.

Factors Affecting Accuracy

The biggest source of variation is the cup measurement. Pecan halves can leave large air gaps, while chopped pieces pack more tightly, so cup weights vary from about 90 to 110 g depending on chop size and how firmly the cup is filled. Individual half weights also differ by cultivar, growing season, and moisture.

Watch out: Do not assume every 'handful' has the same weight. A dense handful of chopped pecans can weigh twice as much as a loose handful of halves. For meal-prepping or medical nutrition goals, always weigh pecans rather than estimating by eye.

The calculator assumes plain raw pecans. Salted, roasted, honey-roasted, or chocolate-covered products introduce added fats, sugars, and sodium, which can shift the numbers. The fiber content itself usually remains similar, but the calorie and net-carb values will be higher on a per-100 g basis.

Frequently Asked Questions

How much fiber should I aim for each day? The FDA Daily Value for fiber is 28 g on a 2,000-calorie diet. The Institute of Medicine suggests roughly 25 g for adult women and 38 g for adult men, though individual needs differ. A single serving of pecans can contribute about 10–20% of that target.

Are pecans keto-friendly? Yes, in sensible portions. The high fat and fiber content makes their net carbs quite low — around 4.3 g per 100 g, or about 1.2 g per ounce. That is why pecans are popular in low-carb and keto snack plans.

Does roasting change the fiber? Dry roasting does not meaningfully change fiber content. However, if pecans are roasted in butter or oil or coated in sugar, their calorie and carbohydrate numbers will increase. Check the ingredient list for added coatings.

Why do my measured values differ from the calculator? Most of the difference comes from measurement method and packing density. The calculator is based on average USDA values and standard cup weights; real pecans vary by cultivar, size, and moisture. Weighing in grams gives the closest match.