Crude Protein Calculator

Estimate crude protein from nitrogen content.

Crude protein (%) 15.625

Formula: crude protein = nitrogen % × 6.25

Step-by-step with your numbers:

1. Values used:

2. Nitrogen content = 2.5 %

3. Conversion factor = 6.25

5. Crude protein = Nitrogen content x Conversion factor = 2.5 x 6.25 = 15.625%

Did we solve your problem today?

The Kjeldahl method estimates protein from a sample's nitrogen content.

The math behind it

crude protein % = nitrogen % × 6.25 (proteins average ~16% nitrogen). Some foods use other factors.

2.5% N → 15.6% crude protein.

Why 6.25?

It's 100 ÷ 16, since protein is ~16% nitrogen on average.