Daily Fiber Intake Calculator
Your age and sex set the target (Institute of Medicine: 25 g for women under 50, 21 g after; 38 g for men under 50, 30 g after). Tap what you've eaten and watch the gap close — per serving, not per 100 g, because that's how food actually arrives.
Fiber today
0 g / 25 g
Set your age and sex, then tap foods.
Tap what you ate (fiber per serving)
Method
Targets follow the IOM adequate intake by age and sex. Per-serving fiber = USDA fiber per 100 g × serving grams. Most people land near 15 g against a 25–38 g target — the gap is what beans, berries, and whole grains are for. Related: caffeine timing and GLP-1 numbers — on a GLP-1? use the GLP-1 fiber calculator with its ramp schedule instead.