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Crude Fibre Calculator

To calculate the quantity of indigestible cellulose, pentosans, lignin, and other components



Percentage of crude fibre


  • m1 = Weight of silica crucible with contents before ashing
  • m2 = Weight of silica crucible with contents after ashing
  • m0 = Sample weight

Defination / Uses

Crude fibre is a measurement of the quantity of indigestible cellulose, pentosans, lignin, and some other components of this type in present foods. These components have no nutritional value, but they offer the bulk necessary for appropriate peristaltic activity in the intestine.


It's used to analyze animal by-products for hair, hoof, or feather residues. Even though the more reliable Van Soest analysis has mostly replaced it since the 1970s, crude fibre analysis is still frequently used in feed laboratories.

It's the leftover plant matter after the solvent has been removed, extraction, followed by dilute acid digestion and alkali. These ingredients aren't edible, but they're useful in other ways. provide you the heft you need for optimal peristaltic activity the digestive tract.

The assessment of crude fibre in food and animal feed is required across the world. AACC Method 32-10.01, Crude Fiber in Flours, Feeds, and Feedstuffs, or AOAC Official Method 962.09 (ISO 5498:2000, AAFCO code 004.00), Fibre content (Crude) in Animal Feed and Dog Food, and, of course, ISO6865:2000 (AAFCO code 004.06). Use the upper given formula for manual calculations. No sign-up, registration OR captcha is required to use this tool.