3 min · calculator

Fiber Intake Calculator

Estimate your average daily fiber intake from food groups.

Step 1 of 2: Food Frequency Questionnaire

How many servings of vegetables do you eat on average per day?

1 serving = 1 cup raw leafy greens or 1/2 cup cooked vegetables.

< 1 serving / day1–2 servings / day3–4 servings / day5+ servings / day

How often do you consume whole grains?

Includes oats, quinoa, brown rice, whole wheat bread, or buckwheat.

Rarely or refined grains only1–3 times per week4–6 times per weekDaily whole grains

How many servings of fresh fruit do you eat daily?

1 serving = 1 medium apple, banana, orange, or 1 cup berries.

< 1 serving / day1–2 servings / day3+ servings / day

How often do you eat legumes, lentils, chia/flax seeds, or nuts?

High-density prebiotic fiber sources.

< 1 time per week1–2 times per week3–5 times per weekDaily legumes, seeds, or nuts

Do you take a supplemental fiber or prebiotic?

For the estimate: 5 g per use; occasional means about 3 days per week. Check your own label for the actual fiber amount.

NoneOccasionallyDaily

This tool is for general wellness education only. It does not diagnose conditions or replace medical advice.

How this rough fiber estimate works

We assume about 3 g per vegetable or fruit serving, 4 g per whole-grain occasion, and 5 g per legume/nut occasion or supplement use. Weekly frequency is averaged over seven days. These are editorial assumptions, not a validated food-frequency questionnaire. The 28 g comparison is a general adult label reference. Check food labels or a dietitian for a more accurate assessment.

Dietary Fiber on the Nutrition Facts Label