In general, around 6 to 24 mg/dL (2.1 to 8.5 mmol/L ) is considered normal. Checking your BUN level is usually not very helpful by itself. A normal BUN level varies, and usually increases as you get older. It is removed from the body through the kidneys. + Serum amyloid A in horses: Some normal horses may have values as high as 21 ug/mL. BUN level results are measured in milligrams per deciliter (mg/dL) or millimoles per liter (mmol/L). The normal range for BUN is 6 to 20 mg/dL, although the range may vary a little from lab to lab. Results of the BUN test are measured in milligrams per deciliter (mg/dL) in the United States and in millimoles per liter (mmol/L) internationally. Units, Nonpregnant Adult, First Trimester, Second Trimester, Third Trimester. Blood urea nitrogen (BUN) Urea nitrogen is a waste product in your blood that comes from the breakdown of protein in the foods you eat. ** A standard comment will be provided versus reference intervals. * Based on correlations between new and old instruments. A value that isnt in the normal range may still be normal for you. Your doctor will also look at your results based on your age, health, and other factors. Your lab report should show the range that your lab uses for each test. The reference intervals for certain analytes are different in heparinized plasma compared to serum (notably potassium, total protein and globulins), but this is species-dependent. Each lab has a different range for whats normal. These intervals were derived for serum samples only.

The following reference intervals have been established for the Cobas 501 chemistry analyzer in the Clinical Pathology Laboratory at Cornell University, and went into effect on November 20th 2017.

Bun normal ranges