Fiber Intake Calculator — Daily Fiber Target
Most people get less than half the fiber they need. Enter your age and sex to see your daily target and how to close the gap with simple food swaps.
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grams of fiber per day
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Daily target
15 g
Average intake
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Daily deficit
High-fiber foods to close the gap
Lentils
15 g / cup
Black beans
15 g / cup
Avocado
10 g / whole
Raspberries
8 g / cup
Oats
4 g / cup
Common questions
Does fiber help with weight loss?
Yes. Fiber increases satiety, slows digestion, and feeds beneficial gut bacteria. High-fiber diets are consistently linked to lower body weight.
Can you eat too much fiber?
Sudden large increases cause bloating and gas. Increase by 5g per week and drink extra water. Most people are far below the threshold for concern.
What's the difference between soluble and insoluble fiber?
Soluble (oats, beans) dissolves in water and lowers cholesterol. Insoluble (whole grains, vegetables) adds bulk and prevents constipation. You need both.
What are the best high-fiber foods?
Legumes (lentils, chickpeas, black beans), berries, avocado, whole grains, and vegetables like broccoli and artichokes.