Fiber Per Serving Calculator
Total fiber / servings. Compare to FDA daily reference (25 g women, 38 g men).
Result
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How to use this calculator
- Sum recipe fiber from ingredients (g per portion of each).
- Set servings.
- Pick sex for daily target.
- Hit 5g+ per main meal to track toward daily total.
About this calculator
Most adults eat half the recommended fiber (15-18 g/day vs. 25-38 target). High-fiber meals: lentils, beans, whole grains, vegetables, fruits. The FDA "good source" cutoff is 3g/serving; "excellent" is 5g+. Fiber improves satiety, blood sugar control, and gut health. Aim for 25-38g daily total — easier with one fiber-rich meal (lentil soup, oatmeal-fruit breakfast) than spreading thin.
Frequently asked
Soluble vs. insoluble?+
Soluble (oats, beans, apples): slows digestion, lowers cholesterol. Insoluble (whole grains, vegetables): adds bulk, helps regularity. Most foods have both.
Where to find ingredient fiber?+
USDA FoodData Central; nutrition label "Dietary Fiber"; many recipe trackers compute automatically.
Does cooking reduce fiber?+
Slightly — heat softens but doesn't destroy fiber. Cooked vegetables retain ~95% of raw fiber.
Why not 38 for everyone?+
IOM/USDA recommendations differ by sex/age based on caloric needs. 14g per 1000 kcal is the underlying rule.
Symptom of too little?+
Constipation, blood sugar spikes, hunger between meals. Most modern Western diets fall short.
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