Urea (BUN): units, conversion and tracking
Updated
Short answer
Urea (BUN) is reported in mg/dL and mmol/L. 1 mmol/L = 2.801 mg/dL.
Convert urea (BUN)
Enter a value to see the converted result.
Converts units only and does not interpret a result. For other markers, use the full unit converter.
What is urea (BUN)?
A waste product from protein breakdown that the kidneys clear; labs report it as urea or as urea nitrogen (BUN).
BiomarkerHQ groups urea (BUN) under Kidney. On lab reports it can also appear as urea, bun, blood urea nitrogen, urea nitrogen, urea nitrogen bun and serum urea.
Urea (BUN) units and conversion
BiomarkerHQ stores each urea (BUN) result in the unit printed on the report, and charts and compares results in mg/dL.
1 mmol/L = 2.801 mg/dL
1 mg/dL = 0.357 mmol/L
| mmol/L | mg/dL |
|---|---|
| 2 mmol/L | 5.603 mg/dL |
| 3 mmol/L | 8.404 mg/dL |
| 4 mmol/L | 11.21 mg/dL |
| 5 mmol/L | 14.01 mg/dL |
| 6 mmol/L | 16.81 mg/dL |
| 8 mmol/L | 22.41 mg/dL |
| 10 mmol/L | 28.01 mg/dL |
| mg/dL | mmol/L |
|---|---|
| 5 mg/dL | 1.785 mmol/L |
| 10 mg/dL | 3.57 mmol/L |
| 15 mg/dL | 5.354 mmol/L |
| 20 mg/dL | 7.139 mmol/L |
| 25 mg/dL | 8.924 mmol/L |
| 30 mg/dL | 10.71 mmol/L |
| 40 mg/dL | 14.28 mmol/L |
For another value, use the lab unit converter. It converts units only and does not interpret a result.
Before comparing urea (BUN) results
Tracking urea (BUN) over time
In BiomarkerHQ, each urea (BUN) result is saved with its collection date, its unit and the reference range printed on that report. The timeline charts the results across your draws against the range from each of your own reports, and any two draws can be compared side by side.
- Keep the unit printed on each report. Convert only to compare.
- Keep each report's own range with its result. See why ranges differ between labs.
- Compare the same lab and conditions where you can. See how to compare two blood tests.
Frequently asked questions
Which units do labs report urea (BUN) in?
Urea (BUN) is reported in mg/dL and mmol/L. BiomarkerHQ stores each result in the unit printed on the report and uses mg/dL for charts and comparisons.
How do I convert urea (BUN) from mmol/L to mg/dL?
1 mmol/L = 2.801 mg/dL. For example, 5 mmol/L is 14.01 mg/dL.
How do I convert urea (BUN) from mg/dL to mmol/L?
1 mg/dL = 0.357 mmol/L. For example, 20 mg/dL is 7.139 mmol/L.
What should I check before comparing urea (BUN) results?
mg/dL is read as urea nitrogen (BUN). Urea reported in mg/dL is 2.14 times larger and is not the same number.
Does BiomarkerHQ interpret my urea (BUN) result?
No. It compares a result only with the reference range printed on your own lab report, as below, within or above, and does not say what the result means. Talk to a qualified clinician about your results.
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