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  3. Urea nitrogen (BUN)

Urea nitrogen (BUN): mg/dL to mmol/L

US labs print urea nitrogen (BUN) in mg/dL; European labs print urea itself in mmol/L, which is the same number of molecules. To convert, divide mg/dL by 2.8014; to go back, multiply mmol/L by 2.8014.

mg/dL
Same value in5.35mmol/L

mmol/L = mg/dL ÷ 2.8014 · molar mass 28.014 g/mol

This converter changes units only. It doesn’t tell you whether a number is in or out of any range: that depends on the range printed by your own lab, and on your doctor. Soma does not diagnose and is not medical advice.

The formula

mg/dL → mmol/L
mmol/L = mg/dL ÷ 2.8014
mmol/L → mg/dL
mg/dL = mmol/L × 2.8014
Where 2.8014 comes from
mg/dL counts the weight of urea nitrogen (BUN) in a volume of blood, mmol/L the number of molecules. One mole of the two nitrogen atoms of urea, N₂ weighs 28.014 g; with that and the difference in volume, one mmol/L is 2.8014 mg/dL.

Common values, converted

Straight conversions, rounded. The table doesn’t mark any value as normal or not; your lab’s report gives its own range.

mg/dLmmol/L
5 mg/dL1.78 mmol/L
10 mg/dL3.57 mmol/L
15 mg/dL5.35 mmol/L
20 mg/dL7.14 mmol/L
25 mg/dL8.92 mmol/L
30 mg/dL10.7 mmol/L
35 mg/dL12.5 mmol/L
40 mg/dL14.3 mmol/L
mmol/Lmg/dL
2 mmol/L5.6 mg/dL
4 mmol/L11.2 mg/dL
6 mmol/L16.8 mg/dL
8 mmol/L22.4 mg/dL
10 mmol/L28 mg/dL
12 mmol/L33.6 mg/dL
14 mmol/L39.2 mg/dL
Show all 93 values: 2–150 mg/dL in mmol/L
  • 2 mg/dL = 0.71 mmol/L
  • 3 mg/dL = 1.07 mmol/L
  • 4 mg/dL = 1.43 mmol/L
  • 5 mg/dL = 1.78 mmol/L
  • 6 mg/dL = 2.14 mmol/L
  • 7 mg/dL = 2.5 mmol/L
  • 8 mg/dL = 2.86 mmol/L
  • 9 mg/dL = 3.21 mmol/L
  • 10 mg/dL = 3.57 mmol/L
  • 11 mg/dL = 3.93 mmol/L
  • 12 mg/dL = 4.28 mmol/L
  • 13 mg/dL = 4.64 mmol/L
  • 14 mg/dL = 5 mmol/L
  • 15 mg/dL = 5.35 mmol/L
  • 16 mg/dL = 5.71 mmol/L
  • 17 mg/dL = 6.07 mmol/L
  • 18 mg/dL = 6.43 mmol/L
  • 19 mg/dL = 6.78 mmol/L
  • 20 mg/dL = 7.14 mmol/L
  • 21 mg/dL = 7.5 mmol/L
  • 22 mg/dL = 7.85 mmol/L
  • 23 mg/dL = 8.21 mmol/L
  • 24 mg/dL = 8.57 mmol/L
  • 25 mg/dL = 8.92 mmol/L
  • 26 mg/dL = 9.28 mmol/L
  • 27 mg/dL = 9.64 mmol/L
  • 28 mg/dL = 10 mmol/L
  • 29 mg/dL = 10.4 mmol/L
  • 30 mg/dL = 10.7 mmol/L
  • 31 mg/dL = 11.1 mmol/L
  • 32 mg/dL = 11.4 mmol/L
  • 33 mg/dL = 11.8 mmol/L
  • 34 mg/dL = 12.1 mmol/L
  • 35 mg/dL = 12.5 mmol/L
  • 36 mg/dL = 12.9 mmol/L
  • 37 mg/dL = 13.2 mmol/L
  • 38 mg/dL = 13.6 mmol/L
  • 39 mg/dL = 13.9 mmol/L
  • 40 mg/dL = 14.3 mmol/L
  • 41 mg/dL = 14.6 mmol/L
  • 42 mg/dL = 15 mmol/L
  • 43 mg/dL = 15.3 mmol/L
  • 44 mg/dL = 15.7 mmol/L
  • 45 mg/dL = 16.1 mmol/L
  • 46 mg/dL = 16.4 mmol/L
  • 47 mg/dL = 16.8 mmol/L
  • 48 mg/dL = 17.1 mmol/L
  • 49 mg/dL = 17.5 mmol/L
  • 50 mg/dL = 17.8 mmol/L
  • 51 mg/dL = 18.2 mmol/L
  • 52 mg/dL = 18.6 mmol/L
  • 53 mg/dL = 18.9 mmol/L
  • 54 mg/dL = 19.3 mmol/L
  • 55 mg/dL = 19.6 mmol/L
  • 56 mg/dL = 20 mmol/L
  • 57 mg/dL = 20.3 mmol/L
  • 58 mg/dL = 20.7 mmol/L
  • 59 mg/dL = 21.1 mmol/L
  • 60 mg/dL = 21.4 mmol/L
  • 61 mg/dL = 21.8 mmol/L
  • 62 mg/dL = 22.1 mmol/L
  • 63 mg/dL = 22.5 mmol/L
  • 64 mg/dL = 22.8 mmol/L
  • 65 mg/dL = 23.2 mmol/L
  • 66 mg/dL = 23.6 mmol/L
  • 67 mg/dL = 23.9 mmol/L
  • 68 mg/dL = 24.3 mmol/L
  • 69 mg/dL = 24.6 mmol/L
  • 70 mg/dL = 25 mmol/L
  • 71 mg/dL = 25.3 mmol/L
  • 72 mg/dL = 25.7 mmol/L
  • 73 mg/dL = 26.1 mmol/L
  • 74 mg/dL = 26.4 mmol/L
  • 75 mg/dL = 26.8 mmol/L
  • 76 mg/dL = 27.1 mmol/L
  • 77 mg/dL = 27.5 mmol/L
  • 78 mg/dL = 27.8 mmol/L
  • 79 mg/dL = 28.2 mmol/L
  • 80 mg/dL = 28.6 mmol/L
  • 85 mg/dL = 30.3 mmol/L
  • 90 mg/dL = 32.1 mmol/L
  • 95 mg/dL = 33.9 mmol/L
  • 100 mg/dL = 35.7 mmol/L
  • 105 mg/dL = 37.5 mmol/L
  • 110 mg/dL = 39.3 mmol/L
  • 115 mg/dL = 41.1 mmol/L
  • 120 mg/dL = 42.8 mmol/L
  • 125 mg/dL = 44.6 mmol/L
  • 130 mg/dL = 46.4 mmol/L
  • 135 mg/dL = 48.2 mmol/L
  • 140 mg/dL = 50 mmol/L
  • 145 mg/dL = 51.8 mmol/L
  • 150 mg/dL = 53.5 mmol/L
Show all 231 values: 0.5–55 mmol/L in mg/dL
  • 0.5 mmol/L = 1.4 mg/dL
  • 0.6 mmol/L = 1.68 mg/dL
  • 0.7 mmol/L = 1.96 mg/dL
  • 0.8 mmol/L = 2.24 mg/dL
  • 0.9 mmol/L = 2.52 mg/dL
  • 1 mmol/L = 2.8 mg/dL
  • 1.1 mmol/L = 3.08 mg/dL
  • 1.2 mmol/L = 3.36 mg/dL
  • 1.3 mmol/L = 3.64 mg/dL
  • 1.4 mmol/L = 3.92 mg/dL
  • 1.5 mmol/L = 4.2 mg/dL
  • 1.6 mmol/L = 4.48 mg/dL
  • 1.7 mmol/L = 4.76 mg/dL
  • 1.8 mmol/L = 5.04 mg/dL
  • 1.9 mmol/L = 5.32 mg/dL
  • 2 mmol/L = 5.6 mg/dL
  • 2.1 mmol/L = 5.88 mg/dL
  • 2.2 mmol/L = 6.16 mg/dL
  • 2.3 mmol/L = 6.44 mg/dL
  • 2.4 mmol/L = 6.72 mg/dL
  • 2.5 mmol/L = 7 mg/dL
  • 2.6 mmol/L = 7.28 mg/dL
  • 2.7 mmol/L = 7.56 mg/dL
  • 2.8 mmol/L = 7.84 mg/dL
  • 2.9 mmol/L = 8.12 mg/dL
  • 3 mmol/L = 8.4 mg/dL
  • 3.1 mmol/L = 8.68 mg/dL
  • 3.2 mmol/L = 8.96 mg/dL
  • 3.3 mmol/L = 9.24 mg/dL
  • 3.4 mmol/L = 9.52 mg/dL
  • 3.5 mmol/L = 9.8 mg/dL
  • 3.6 mmol/L = 10.1 mg/dL
  • 3.7 mmol/L = 10.4 mg/dL
  • 3.8 mmol/L = 10.6 mg/dL
  • 3.9 mmol/L = 10.9 mg/dL
  • 4 mmol/L = 11.2 mg/dL
  • 4.1 mmol/L = 11.5 mg/dL
  • 4.2 mmol/L = 11.8 mg/dL
  • 4.3 mmol/L = 12 mg/dL
  • 4.4 mmol/L = 12.3 mg/dL
  • 4.5 mmol/L = 12.6 mg/dL
  • 4.6 mmol/L = 12.9 mg/dL
  • 4.7 mmol/L = 13.2 mg/dL
  • 4.8 mmol/L = 13.4 mg/dL
  • 4.9 mmol/L = 13.7 mg/dL
  • 5 mmol/L = 14 mg/dL
  • 5.1 mmol/L = 14.3 mg/dL
  • 5.2 mmol/L = 14.6 mg/dL
  • 5.3 mmol/L = 14.8 mg/dL
  • 5.4 mmol/L = 15.1 mg/dL
  • 5.5 mmol/L = 15.4 mg/dL
  • 5.6 mmol/L = 15.7 mg/dL
  • 5.7 mmol/L = 16 mg/dL
  • 5.8 mmol/L = 16.2 mg/dL
  • 5.9 mmol/L = 16.5 mg/dL
  • 6 mmol/L = 16.8 mg/dL
  • 6.1 mmol/L = 17.1 mg/dL
  • 6.2 mmol/L = 17.4 mg/dL
  • 6.3 mmol/L = 17.6 mg/dL
  • 6.4 mmol/L = 17.9 mg/dL
  • 6.5 mmol/L = 18.2 mg/dL
  • 6.6 mmol/L = 18.5 mg/dL
  • 6.7 mmol/L = 18.8 mg/dL
  • 6.8 mmol/L = 19 mg/dL
  • 6.9 mmol/L = 19.3 mg/dL
  • 7 mmol/L = 19.6 mg/dL
  • 7.1 mmol/L = 19.9 mg/dL
  • 7.2 mmol/L = 20.2 mg/dL
  • 7.3 mmol/L = 20.5 mg/dL
  • 7.4 mmol/L = 20.7 mg/dL
  • 7.5 mmol/L = 21 mg/dL
  • 7.6 mmol/L = 21.3 mg/dL
  • 7.7 mmol/L = 21.6 mg/dL
  • 7.8 mmol/L = 21.9 mg/dL
  • 7.9 mmol/L = 22.1 mg/dL
  • 8 mmol/L = 22.4 mg/dL
  • 8.1 mmol/L = 22.7 mg/dL
  • 8.2 mmol/L = 23 mg/dL
  • 8.3 mmol/L = 23.3 mg/dL
  • 8.4 mmol/L = 23.5 mg/dL
  • 8.5 mmol/L = 23.8 mg/dL
  • 8.6 mmol/L = 24.1 mg/dL
  • 8.7 mmol/L = 24.4 mg/dL
  • 8.8 mmol/L = 24.7 mg/dL
  • 8.9 mmol/L = 24.9 mg/dL
  • 9 mmol/L = 25.2 mg/dL
  • 9.1 mmol/L = 25.5 mg/dL
  • 9.2 mmol/L = 25.8 mg/dL
  • 9.3 mmol/L = 26.1 mg/dL
  • 9.4 mmol/L = 26.3 mg/dL
  • 9.5 mmol/L = 26.6 mg/dL
  • 9.6 mmol/L = 26.9 mg/dL
  • 9.7 mmol/L = 27.2 mg/dL
  • 9.8 mmol/L = 27.5 mg/dL
  • 9.9 mmol/L = 27.7 mg/dL
  • 10 mmol/L = 28 mg/dL
  • 10.1 mmol/L = 28.3 mg/dL
  • 10.2 mmol/L = 28.6 mg/dL
  • 10.3 mmol/L = 28.9 mg/dL
  • 10.4 mmol/L = 29.1 mg/dL
  • 10.5 mmol/L = 29.4 mg/dL
  • 10.6 mmol/L = 29.7 mg/dL
  • 10.7 mmol/L = 30 mg/dL
  • 10.8 mmol/L = 30.3 mg/dL
  • 10.9 mmol/L = 30.5 mg/dL
  • 11 mmol/L = 30.8 mg/dL
  • 11.1 mmol/L = 31.1 mg/dL
  • 11.2 mmol/L = 31.4 mg/dL
  • 11.3 mmol/L = 31.7 mg/dL
  • 11.4 mmol/L = 31.9 mg/dL
  • 11.5 mmol/L = 32.2 mg/dL
  • 11.6 mmol/L = 32.5 mg/dL
  • 11.7 mmol/L = 32.8 mg/dL
  • 11.8 mmol/L = 33.1 mg/dL
  • 11.9 mmol/L = 33.3 mg/dL
  • 12 mmol/L = 33.6 mg/dL
  • 12.1 mmol/L = 33.9 mg/dL
  • 12.2 mmol/L = 34.2 mg/dL
  • 12.3 mmol/L = 34.5 mg/dL
  • 12.4 mmol/L = 34.7 mg/dL
  • 12.5 mmol/L = 35 mg/dL
  • 12.6 mmol/L = 35.3 mg/dL
  • 12.7 mmol/L = 35.6 mg/dL
  • 12.8 mmol/L = 35.9 mg/dL
  • 12.9 mmol/L = 36.1 mg/dL
  • 13 mmol/L = 36.4 mg/dL
  • 13.1 mmol/L = 36.7 mg/dL
  • 13.2 mmol/L = 37 mg/dL
  • 13.3 mmol/L = 37.3 mg/dL
  • 13.4 mmol/L = 37.5 mg/dL
  • 13.5 mmol/L = 37.8 mg/dL
  • 13.6 mmol/L = 38.1 mg/dL
  • 13.7 mmol/L = 38.4 mg/dL
  • 13.8 mmol/L = 38.7 mg/dL
  • 13.9 mmol/L = 38.9 mg/dL
  • 14 mmol/L = 39.2 mg/dL
  • 14.1 mmol/L = 39.5 mg/dL
  • 14.2 mmol/L = 39.8 mg/dL
  • 14.3 mmol/L = 40.1 mg/dL
  • 14.4 mmol/L = 40.3 mg/dL
  • 14.5 mmol/L = 40.6 mg/dL
  • 14.6 mmol/L = 40.9 mg/dL
  • 14.7 mmol/L = 41.2 mg/dL
  • 14.8 mmol/L = 41.5 mg/dL
  • 14.9 mmol/L = 41.7 mg/dL
  • 15 mmol/L = 42 mg/dL
  • 15.1 mmol/L = 42.3 mg/dL
  • 15.2 mmol/L = 42.6 mg/dL
  • 15.3 mmol/L = 42.9 mg/dL
  • 15.4 mmol/L = 43.1 mg/dL
  • 15.5 mmol/L = 43.4 mg/dL
  • 15.6 mmol/L = 43.7 mg/dL
  • 15.7 mmol/L = 44 mg/dL
  • 15.8 mmol/L = 44.3 mg/dL
  • 15.9 mmol/L = 44.5 mg/dL
  • 16 mmol/L = 44.8 mg/dL
  • 16.1 mmol/L = 45.1 mg/dL
  • 16.2 mmol/L = 45.4 mg/dL
  • 16.3 mmol/L = 45.7 mg/dL
  • 16.4 mmol/L = 45.9 mg/dL
  • 16.5 mmol/L = 46.2 mg/dL
  • 16.6 mmol/L = 46.5 mg/dL
  • 16.7 mmol/L = 46.8 mg/dL
  • 16.8 mmol/L = 47.1 mg/dL
  • 16.9 mmol/L = 47.3 mg/dL
  • 17 mmol/L = 47.6 mg/dL
  • 17.1 mmol/L = 47.9 mg/dL
  • 17.2 mmol/L = 48.2 mg/dL
  • 17.3 mmol/L = 48.5 mg/dL
  • 17.4 mmol/L = 48.7 mg/dL
  • 17.5 mmol/L = 49 mg/dL
  • 17.6 mmol/L = 49.3 mg/dL
  • 17.7 mmol/L = 49.6 mg/dL
  • 17.8 mmol/L = 49.9 mg/dL
  • 17.9 mmol/L = 50.1 mg/dL
  • 18 mmol/L = 50.4 mg/dL
  • 18.1 mmol/L = 50.7 mg/dL
  • 18.2 mmol/L = 51 mg/dL
  • 18.3 mmol/L = 51.3 mg/dL
  • 18.4 mmol/L = 51.5 mg/dL
  • 18.5 mmol/L = 51.8 mg/dL
  • 18.6 mmol/L = 52.1 mg/dL
  • 18.7 mmol/L = 52.4 mg/dL
  • 18.8 mmol/L = 52.7 mg/dL
  • 18.9 mmol/L = 52.9 mg/dL
  • 19 mmol/L = 53.2 mg/dL
  • 19.1 mmol/L = 53.5 mg/dL
  • 19.2 mmol/L = 53.8 mg/dL
  • 19.3 mmol/L = 54.1 mg/dL
  • 19.4 mmol/L = 54.3 mg/dL
  • 19.5 mmol/L = 54.6 mg/dL
  • 19.6 mmol/L = 54.9 mg/dL
  • 19.7 mmol/L = 55.2 mg/dL
  • 19.8 mmol/L = 55.5 mg/dL
  • 19.9 mmol/L = 55.7 mg/dL
  • 20 mmol/L = 56 mg/dL
  • 21 mmol/L = 58.8 mg/dL
  • 22 mmol/L = 61.6 mg/dL
  • 23 mmol/L = 64.4 mg/dL
  • 24 mmol/L = 67.2 mg/dL
  • 25 mmol/L = 70 mg/dL
  • 26 mmol/L = 72.8 mg/dL
  • 27 mmol/L = 75.6 mg/dL
  • 28 mmol/L = 78.4 mg/dL
  • 29 mmol/L = 81.2 mg/dL
  • 30 mmol/L = 84 mg/dL
  • 31 mmol/L = 86.8 mg/dL
  • 32 mmol/L = 89.6 mg/dL
  • 33 mmol/L = 92.4 mg/dL
  • 34 mmol/L = 95.2 mg/dL
  • 35 mmol/L = 98 mg/dL
  • 36 mmol/L = 100.9 mg/dL
  • 37 mmol/L = 103.7 mg/dL
  • 38 mmol/L = 106.5 mg/dL
  • 39 mmol/L = 109.3 mg/dL
  • 40 mmol/L = 112.1 mg/dL
  • 41 mmol/L = 114.9 mg/dL
  • 42 mmol/L = 117.7 mg/dL
  • 43 mmol/L = 120.5 mg/dL
  • 44 mmol/L = 123.3 mg/dL
  • 45 mmol/L = 126.1 mg/dL
  • 46 mmol/L = 128.9 mg/dL
  • 47 mmol/L = 131.7 mg/dL
  • 48 mmol/L = 134.5 mg/dL
  • 49 mmol/L = 137.3 mg/dL
  • 50 mmol/L = 140.1 mg/dL
  • 51 mmol/L = 142.9 mg/dL
  • 52 mmol/L = 145.7 mg/dL
  • 53 mmol/L = 148.5 mg/dL
  • 54 mmol/L = 151.3 mg/dL
  • 55 mmol/L = 154.1 mg/dL

About the test

Blood urea nitrogen (BUN) is the same thing as urea, on a different scale: the one used in the US.

About the urea nitrogen (BUN) test · BUN (Blood Urea Nitrogen) — MedlinePlus (U.S. National Library of Medicine).

Questions

How do I convert urea nitrogen (BUN) from mg/dL to mmol/L?

Divide mg/dL by 2.8014. For example, 15 mg/dL is 5.35 mmol/L.

How do I convert urea nitrogen (BUN) from mmol/L to mg/dL?

Multiply mmol/L by 2.8014. For example, 8 mmol/L is 22.4 mg/dL.

Why is the factor 2.8014?

It follows from the molar mass of the two nitrogen atoms of urea, N₂, 28.014 g/mol, and from the volume each unit counts in.

Related conversions

Urea nitrogen (BUN) 15 mg/dL= 5.35 mmol/L

Soma converts straight from the PDF

Share a lab report to Soma, and it reads every row on your phone and converts the units for you, so a Quest result in mg/dL and a Synlab result in mmol/L sit on one chart, each against its own lab’s range. No account, nothing uploaded.

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Sources: PubChem: Nitrogen (the two nitrogen atoms of urea, N₂), molar mass 28.014 g/mol; the test description from MedlinePlus. Mention of a source doesn’t mean it endorses Soma.