Our free Crude Protein Calculator helps you quickly determine the protein content in food, feed, or biological samples based on their nitrogen percentage. This tool is essential for nutritionists, researchers, and quality control professionals using methods like Kjeldahl or Dumas.
Formula:
The formula for calculating crude protein content is straightforward:
Crude Protein (%) = Nitrogen (%) × Protein Conversion Factor
- Nitrogen (%): The percentage of nitrogen measured in the sample (e.g., via Kjeldahl or Dumas method).
- Protein Conversion Factor: A multiplier used to convert nitrogen to protein. Commonly 6.25 for many food items, but specific factors exist for different materials (e.g., 5.70 for wheat, 6.38 for milk).