Daily Fibre Intake Calculator

Dietary Fibre Guide

What do I need to know about UK Fibre Recommendations?

Daily fibre target by age: 2-5 years: 15g. 5-11 years: 20g. 11-16 years: 25g. 16+ years: 30g. Most UK adults consume only 18-19g/day — far below the 30g recommendation. Two types of fibre matter: soluble fibre (dissolves in water — forms gel): oats, beans, lentils, apples, pears, citrus. Lowers cholesterol, slows glucose absorption, supports gut bacteria. Insoluble fibre: wholegrains, vegetable skins, nuts. Adds bulk, speeds transit time, prevents constipation. Most fibre-rich foods contain both soluble and insoluble fibre in varying proportions, so eating a wide variety of wholegrains, fruit, vegetables, and legumes is more effective than focusing on one type alone.

What do I need to know about Fibre in Common Foods?

Approximate fibre per portion: porridge oats (40g dry): 4g. Wholemeal bread (1 slice): 2-3g. Brown rice (180g cooked): 3g. Mixed vegetables (80g): 2-4g. Apple with skin (medium): 3g. Pear with skin (medium): 5g. Avocado (half): 6g. Black beans (100g cooked): 8g. Lentils (100g cooked): 8g. Chickpeas (100g cooked): 7g. Chia seeds (1 tbsp/15g): 5g. Almonds (30g): 4g. Linseed (1 tbsp ground): 3g. Easy 30g day: porridge with berries (10g), wholemeal sandwich with salad (10g), dinner with vegetables and a wholegrain side (7g) can realistically add up to the recommended 30g across a normal day without a dramatic diet overhaul.

What's the key thing to understand about Health Benefits of High Fibre?

Strong evidence-based benefits: cardiovascular disease — fibre intake reduces LDL cholesterol and blood pressure. Each 7g daily fibre: 9% lower CVD risk. Type 2 diabetes — fibre slows glucose absorption, improving insulin sensitivity. 19% lower T2D risk per 10g daily fibre. Colorectal cancer — high-fibre diets reduce risk approximately 16% per 10g daily fibre. Weight management — fibre increases satiety, helping maintain healthy weight. Gut health — feeds beneficial gut bacteria. Soluble fibre specifically helps lower LDL cholesterol by binding to it in the digestive system before it can be absorbed.

What should I know about Increasing Intake Safely?

Increase gradually over 2-3 weeks: rapid increases cause bloating, gas, and discomfort while the gut microbiome adjusts. Drink plenty of water: fibre absorbs water; inadequate hydration causes constipation. Easy daily upgrades: porridge for breakfast (4g vs 1g for refined cereal). Switch white to wholemeal bread (3g vs 1g per slice). Add lentils or beans to soups, stews, curries (8g per portion). Eat fruit with skin (2-3× more fibre than peeled). Snack on nuts or seeds rather than crisps. Add chia or flax seeds to breakfast, yoghurt, or smoothies — both are easy, low-effort ways to add several grams of fibre. Increase intake gradually and drink plenty of water, since a sudden large increase can cause bloating and discomfort.