Blood Urea normal range — check your value

Roughly 15 to 40 mg/dL. Labs reporting blood urea nitrogen instead use about 7 to 20 mg/dL.

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Your Blood Urea test value

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Blood Urea

mg/dL

What Blood Urea measures

Waste produced when the liver breaks down protein, cleared by the kidneys and sensitive to hydration and diet.

Blood Urea normal range chart

ResultBlood Urea (mg/dL)

Below rangeBelow 19

In range19 – 44.1

Above range44.1 and above

These bands are for female, 31–45 years. Enter your age and gender above to see the bands for you. The table below shows the range for every age and gender.

Blood Urea normal range by age and gender

AgeMaleFemale

0–1 years10 – 30 mg/dL10 – 30 mg/dL

2–6 years15 – 36 mg/dL15 – 36 mg/dL

7–11 years15 – 36 mg/dL15 – 36 mg/dL

12–17 years18 – 45 mg/dL18 – 45 mg/dL

18–30 years19 – 44.1 mg/dL19 – 44.1 mg/dL

31–45 years19 – 44.1 mg/dL19 – 44.1 mg/dL

46–60 years18 – 55 mg/dL18 – 55 mg/dL

60 years and above18 – 55 mg/dL18 – 55 mg/dL

What a high Blood Urea means, and common causes

Waste from protein breakdown is accumulating. Urea moves with hydration and diet as much as with kidney function, so it is read alongside creatinine.

Common causes: Dehydration, a high-protein diet, reduced kidney function, bleeding in the stomach or intestines, heart failure, and steroid medicines.

What a low Blood Urea means, and common causes

A low urea is rarely a concern on its own.

Common causes: A low-protein diet, pregnancy, overhydration, and advanced liver disease, where the liver makes less urea.

Frequently asked questions

Roughly 15 to 40 mg/dL. Labs reporting blood urea nitrogen instead use about 7 to 20 mg/dL.

That pattern usually means dehydration, a high-protein diet or bleeding in the gut rather than a kidney problem. Rehydrating and repeating the test often settles it.

The ratio helps separate dehydration and gut bleeding, which raise urea more, from kidney disease, which raises both together.

Aksar paani ki kami ya zyada protein khane se hota hai. Creatinine ke saath padhne par kidney ki asli halat samajh aati hai.

Please note. This page explains what a number means against reference ranges for your age and gender. It does not diagnose anything, cannot see the rest of your report, and is no substitute for a doctor. If your lab’s printed range differs, your lab’s range applies.