Enter the weight of the material when wet and the weight of the material when dry to calculate the dry matter percentage.

Dry Matter Formula

The following formula is used to calculate a dry matter percentage.

DMP = DW / WW *100
  • Where DMP is the dry matter percentage
  • WW is the total weight while wet
  • DW is the total weight while dry

To calculate the dry matter percentage, divide the total dry weight by the total wet weight, then multiply by 100.

Dry Matter Percentage Definition

Dry Matter Percentage refers to the proportion of solids remaining in a substance after all the moisture has been removed. It measures the solid content or the non-water components of a material. This percentage is important as it provides valuable information about the concentration, quality, and nutritional value of various substances, such as animal feed, forage, and agricultural products.

In agriculture, dry matter percentage is significant in determining the nutritional value and suitability of fodder for livestock consumption.

For example, in hay or silage, a higher dry matter percentage indicates a greater concentration of nutrients, resulting in higher-quality feed.

Dry Matter Example

How to calculate dry matter?

  1. First, determine the wet weight.

    Measure the total weight of the sample when wet.

  2. Next, evaporate all of the moisture.

    Evaporate off all of the moisture from the feed, or drain the water to the best of your ability.

  3. Next, measure the dry weight.

    Measure the weight after the moisture has been removed.

  4. Finally, calculate the dry matter.

    Calculate the percentage of dry matter using the equation above.


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