Only 7% of people hit their daily fiber — your smoothie can close the gap.
Fiber values are approximate per the listed serving, based on USDA FoodData Central and Mayo Clinic data. Increase gradually and drink water. Not medical advice.
"Fibermaxxing" is the playful name for a simple habit: deliberately stacking high-fiber foods so you actually reach the daily fiber goal most people miss. Instead of hoping a sandwich covers it, you build a smoothie or bowl from ingredients that each carry a few grams, and the total adds up fast. This calculator does the arithmetic so you can see the gap close in real time.
Major health bodies, including guidance echoed by Mayo Clinic, point to roughly 25–38 grams of fiber a day depending on age and sex, with about 30g often cited as a general target for adults. Only a small fraction of people get there. Falling short is linked to rougher digestion and a less diverse gut microbiome, which is why "eat more fiber" is such durable advice.
Fiber is not one thing. Soluble fiber dissolves into a gel, slows digestion, and feeds beneficial gut bacteria — think oats, beans, and psyllium. Insoluble fiber adds bulk and keeps things moving — think vegetable skins and wheat bran. You want both, which is why the calculator breaks the total into the two types instead of hiding them in one number.
Tap a food or press + to add a serving; tap the presets to load a whole blend at once. Watch the jar fill toward your goal and the two fine bars track soluble versus insoluble grams. Set your goal with the pills at the top — 25g for many women, 30g general, 38g for many men — then adjust as needed.
Fiber values are approximate per the listed serving, based on public references such as USDA FoodData Central and Mayo Clinic. They are close enough to plan a day, not precise enough to replace a nutrition label. This tool is for education, not medical advice — increase fiber gently and check with a clinician if you have a digestive condition.
This calculator is for ordinary people who keep hearing "eat more fiber" and want to actually see the number move. It is not a meal plan, a diet, or medical advice. If you have a condition such as IBS, Crohn's, or a history of bloating, check with a clinician before piling on fiber, and increase it gradually so your gut can adapt.