Type in the fibre you actually eat. The published adult figures line up beside it, and not one of them was set for you.
Estimates are for general guidance only and are not medical advice. For a personalised plan, book a free guided tour at RPM Gym.
The top line is your own intake. Everything under it belongs to somebody else: EFSA gives adults 25 g, WHO asks for at least 25 g from foods, and the IOM's Adequate Intake moves with your sex and age band. The fourth line is what 14 g per 1,000 kcal comes to at the calories you entered.
Those last two are the same reference twice, and that is the thing this page mainly exists to say. The IOM's 38 g and 25 g were not derived from evidence separate from the per-1,000-kcal rate. They are that rate multiplied by the median usual daily energy intake in a US survey run in the mid-1990s. Reverse the arithmetic and 38 g implies about 2,700 kcal a day, 25 g about 1,800. Those are the survey's medians, not yours.
The old version of this tool took the larger of the rate and the flat figure and called it your requirement. Taking the max of a rule and the same rule frozen at a stranger's calorie intake is not combining two authorities. It is using one of them twice, and the flat figure only ever won when you ate less than a 1990s American did.
The three bodies do land near 25 g, and they get there by different routes. EFSA's figure is about normal laxation. The IOM's Adequate Intakes were set against coronary heart disease risk. WHO's sits inside a 2023 guideline on carbohydrate quality and non-communicable disease. Same neighbourhood, three different questions, so merging them into a single target would throw away the only information they carry.
The definitions differ too, and that one has a practical edge. EFSA counts non-digestible carbohydrates plus lignin. The IOM adds what it calls functional fibre, meaning isolated or synthetic fibre with a demonstrated benefit, so a spoonful of husk counts towards its figure. WHO 2023 is the strictest of the three: naturally occurring fibre as consumed in foods, with supplements and powders explicitly outside it. If some of your grams come from a tub, they answer to one figure on this screen and not another.
Your intake = the number you type, in grams per day EFSA 2010: 25 g/day, adequate for normal laxation in adults. One figure, no sex split. WHO 2023: at least 25 g/day of naturally occurring dietary fibre, as consumed in foods. IOM 2005 Adequate Intake, by sex and age band: men 19-50 -> 38 g men 51+ -> 30 g women 19-50 -> 25 g women 51+ -> 21 g Energy-scaled rate: (your calories / 1,000) x 14 g Gap = your intake - 25 g, reported as above or below the EFSA figure. No two figures are averaged, combined or reconciled, and nothing on the screen is personalised.
A 34-year-old man eating around 2,200 kcal a day, with a tracking app reporting 18 g of fibre.
Four figures spanning 25 to 38 g, and the spread is the interesting part. His energy-scaled line reads 31 g because he eats 2,200 kcal; the IOM's 38 g is the same rule run at roughly 2,700, which is what the survey median happened to be. The old tool would have shown him 38 and called it his requirement. The number he can act on is the 7 g.
No published body answers that for an individual, so this page does not either. What exists is a set of adult figures: 25 g from EFSA, at least 25 g from WHO, and 21 to 38 g from the IOM depending on sex and age. They describe populations. Wanting to sit near them is reasonable; treating one of them as your personal requirement is reading them wrong.
Because collapsing them deletes the only thing they tell you. The four sit within a few grams of each other while answering different questions, using different definitions of fibre, and in one case saying the same thing twice. A single averaged target would look more useful and carry less information.
Because it is not an independent finding. The Adequate Intakes were produced by taking 14 g per 1,000 kcal and multiplying it by the median usual energy intake from a US survey of the mid-1990s. For men under 51 that median worked out near 2,700 kcal, which is where 38 comes from. It is the per-calorie rule wearing a flat number's clothes.
It depends which line you are reading. The IOM counts what it calls functional fibre — isolated or synthetic fibre with a demonstrated physiological benefit — so husk or inulin powder counts towards its figure. WHO's 2023 recommendation is written for naturally occurring dietary fibre as consumed in foods and puts supplements outside it. Same grams, two answers.
Nothing here says so, and none of these figures is a ceiling. WHO's is a floor by its own wording. EFSA's names an amount adequate for normal laxation. The IOM's are Adequate Intakes, and that report set no upper level for fibre at all, while noting one might become necessary if fortified foods and supplements spread. An absent maximum is not an instruction to keep climbing.
Only the IOM line moves, and it moves because its age bands stop at 50. Since that figure is a per-calorie rate multiplied by a median energy intake, a lower figure for the older band means the median energy intake recorded in it was lower. The step belongs to the table. Nothing about you changed overnight.
A label, a tracking app, or the food calculator on this site, which returns a measured fibre row alongside calories and macros from published food-composition data. Any of the three beats a guess, and precision matters less here than you would expect. The references are only a few grams apart, so landing near 15 and landing near 30 are different situations, and telling those two apart is most of the value.
The food side of training starts with knowing what is on the plate, and that part is a conversation rather than a calculator. Book a free guided tour at RPM Gym in Al Manhal.