The normal range for a BUN test depends on your age and sex, or the one you were assigned at birth. Normal BUN levels. Your result will be a number that measures how much BUN is in your blood.

The ideal range of BUN values might vary based on the person’s age and the reference range that the laboratory uses. People should speak to their doctor about what their results mean. Considerations ...

Blood urea nitrogen. Normal range: 7 to 20 mg/dL Higher levels (greater than 20-40 mg/dL) may be suggestive of altered kidney function. Elevated BUN values may also be seen in dehydration, ...

A healthy BUN level ranges from 7 to 20 milligrams per deciliter. A BUN level higher than 20 may indicate kidney failure. Read more.