Magnesium: mg/dL to mmol/L

US labs print magnesium in mg/dL, most European labs in mmol/L. To convert, divide mg/dL by 2.4305; to go back, multiply mmol/L by 2.4305.

Value

mg/dL

Same value in0.82mmol/L

mmol/L = mg/dL ÷ 2.4305 · molar mass 24.305 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 ÷ 2.4305
mmol/L → mg/dL: mg/dL = mmol/L × 2.4305
Where 2.4305 comes from: mg/dL counts the weight of magnesium in a volume of blood, mmol/L the number of molecules. One mole of magnesium weighs 24.305 g; with that and the difference in volume, one mmol/L is 2.4305 mg/dL.

What the values mean

Typical ranges as the MedlinePlus Medical Encyclopedia gives them, in both units. They are for orientation only: your lab may use other ranges, and a result is read against the range printed on its own report.

Group	mg/dL	mmol/L
Adults	1.7–2.2	0.699–0.905

Source: Magnesium blood test, MedlinePlus Medical Encyclopedia (U.S. National Library of Medicine), “Normal Results”. The second unit is converted here and rounded.

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/dL	mmol/L
1.4 mg/dL	0.58 mmol/L
1.6 mg/dL	0.66 mmol/L
1.8 mg/dL	0.74 mmol/L
2 mg/dL	0.82 mmol/L
2.2 mg/dL	0.91 mmol/L
2.4 mg/dL	0.99 mmol/L
2.6 mg/dL	1.07 mmol/L
2.8 mg/dL	1.15 mmol/L
3 mg/dL	1.23 mmol/L

mmol/L	mg/dL
0.5 mmol/L	1.22 mg/dL
0.6 mmol/L	1.46 mg/dL
0.7 mmol/L	1.7 mg/dL
0.8 mmol/L	1.94 mg/dL
0.9 mmol/L	2.19 mg/dL
1 mmol/L	2.43 mg/dL
1.1 mmol/L	2.67 mg/dL
1.2 mmol/L	2.92 mg/dL
1.3 mmol/L	3.16 mg/dL

Show all 46 values: 0.5–5 mg/dL in mmol/L

0.5 mg/dL = 0.21 mmol/L
0.6 mg/dL = 0.25 mmol/L
0.7 mg/dL = 0.29 mmol/L
0.8 mg/dL = 0.33 mmol/L
0.9 mg/dL = 0.37 mmol/L
1 mg/dL = 0.41 mmol/L
1.1 mg/dL = 0.45 mmol/L
1.2 mg/dL = 0.49 mmol/L
1.3 mg/dL = 0.53 mmol/L
1.4 mg/dL = 0.58 mmol/L
1.5 mg/dL = 0.62 mmol/L
1.6 mg/dL = 0.66 mmol/L
1.7 mg/dL = 0.7 mmol/L
1.8 mg/dL = 0.74 mmol/L
1.9 mg/dL = 0.78 mmol/L
2 mg/dL = 0.82 mmol/L
2.1 mg/dL = 0.86 mmol/L
2.2 mg/dL = 0.91 mmol/L
2.3 mg/dL = 0.95 mmol/L
2.4 mg/dL = 0.99 mmol/L
2.5 mg/dL = 1.03 mmol/L
2.6 mg/dL = 1.07 mmol/L
2.7 mg/dL = 1.11 mmol/L
2.8 mg/dL = 1.15 mmol/L
2.9 mg/dL = 1.19 mmol/L
3 mg/dL = 1.23 mmol/L
3.1 mg/dL = 1.28 mmol/L
3.2 mg/dL = 1.32 mmol/L
3.3 mg/dL = 1.36 mmol/L
3.4 mg/dL = 1.4 mmol/L
3.5 mg/dL = 1.44 mmol/L
3.6 mg/dL = 1.48 mmol/L
3.7 mg/dL = 1.52 mmol/L
3.8 mg/dL = 1.56 mmol/L
3.9 mg/dL = 1.6 mmol/L
4 mg/dL = 1.65 mmol/L
4.1 mg/dL = 1.69 mmol/L
4.2 mg/dL = 1.73 mmol/L
4.3 mg/dL = 1.77 mmol/L
4.4 mg/dL = 1.81 mmol/L
4.5 mg/dL = 1.85 mmol/L
4.6 mg/dL = 1.89 mmol/L
4.7 mg/dL = 1.93 mmol/L
4.8 mg/dL = 1.97 mmol/L
4.9 mg/dL = 2.02 mmol/L
5 mg/dL = 2.06 mmol/L

Show all 181 values: 0.2–2 mmol/L in mg/dL

0.2 mmol/L = 0.49 mg/dL
0.21 mmol/L = 0.51 mg/dL
0.22 mmol/L = 0.53 mg/dL
0.23 mmol/L = 0.56 mg/dL
0.24 mmol/L = 0.58 mg/dL
0.25 mmol/L = 0.61 mg/dL
0.26 mmol/L = 0.63 mg/dL
0.27 mmol/L = 0.66 mg/dL
0.28 mmol/L = 0.68 mg/dL
0.29 mmol/L = 0.7 mg/dL
0.3 mmol/L = 0.73 mg/dL
0.31 mmol/L = 0.75 mg/dL
0.32 mmol/L = 0.78 mg/dL
0.33 mmol/L = 0.8 mg/dL
0.34 mmol/L = 0.83 mg/dL
0.35 mmol/L = 0.85 mg/dL
0.36 mmol/L = 0.87 mg/dL
0.37 mmol/L = 0.9 mg/dL
0.38 mmol/L = 0.92 mg/dL
0.39 mmol/L = 0.95 mg/dL
0.4 mmol/L = 0.97 mg/dL
0.41 mmol/L = 1 mg/dL
0.42 mmol/L = 1.02 mg/dL
0.43 mmol/L = 1.05 mg/dL
0.44 mmol/L = 1.07 mg/dL
0.45 mmol/L = 1.09 mg/dL
0.46 mmol/L = 1.12 mg/dL
0.47 mmol/L = 1.14 mg/dL
0.48 mmol/L = 1.17 mg/dL
0.49 mmol/L = 1.19 mg/dL
0.5 mmol/L = 1.22 mg/dL
0.51 mmol/L = 1.24 mg/dL
0.52 mmol/L = 1.26 mg/dL
0.53 mmol/L = 1.29 mg/dL
0.54 mmol/L = 1.31 mg/dL
0.55 mmol/L = 1.34 mg/dL
0.56 mmol/L = 1.36 mg/dL
0.57 mmol/L = 1.39 mg/dL
0.58 mmol/L = 1.41 mg/dL
0.59 mmol/L = 1.43 mg/dL
0.6 mmol/L = 1.46 mg/dL
0.61 mmol/L = 1.48 mg/dL
0.62 mmol/L = 1.51 mg/dL
0.63 mmol/L = 1.53 mg/dL
0.64 mmol/L = 1.56 mg/dL
0.65 mmol/L = 1.58 mg/dL
0.66 mmol/L = 1.6 mg/dL
0.67 mmol/L = 1.63 mg/dL
0.68 mmol/L = 1.65 mg/dL
0.69 mmol/L = 1.68 mg/dL
0.7 mmol/L = 1.7 mg/dL
0.71 mmol/L = 1.73 mg/dL
0.72 mmol/L = 1.75 mg/dL
0.73 mmol/L = 1.77 mg/dL
0.74 mmol/L = 1.8 mg/dL
0.75 mmol/L = 1.82 mg/dL
0.76 mmol/L = 1.85 mg/dL
0.77 mmol/L = 1.87 mg/dL
0.78 mmol/L = 1.9 mg/dL
0.79 mmol/L = 1.92 mg/dL
0.8 mmol/L = 1.94 mg/dL
0.81 mmol/L = 1.97 mg/dL
0.82 mmol/L = 1.99 mg/dL
0.83 mmol/L = 2.02 mg/dL
0.84 mmol/L = 2.04 mg/dL
0.85 mmol/L = 2.07 mg/dL
0.86 mmol/L = 2.09 mg/dL
0.87 mmol/L = 2.11 mg/dL
0.88 mmol/L = 2.14 mg/dL
0.89 mmol/L = 2.16 mg/dL
0.9 mmol/L = 2.19 mg/dL
0.91 mmol/L = 2.21 mg/dL
0.92 mmol/L = 2.24 mg/dL
0.93 mmol/L = 2.26 mg/dL
0.94 mmol/L = 2.28 mg/dL
0.95 mmol/L = 2.31 mg/dL
0.96 mmol/L = 2.33 mg/dL
0.97 mmol/L = 2.36 mg/dL
0.98 mmol/L = 2.38 mg/dL
0.99 mmol/L = 2.41 mg/dL
1 mmol/L = 2.43 mg/dL
1.01 mmol/L = 2.45 mg/dL
1.02 mmol/L = 2.48 mg/dL
1.03 mmol/L = 2.5 mg/dL
1.04 mmol/L = 2.53 mg/dL
1.05 mmol/L = 2.55 mg/dL
1.06 mmol/L = 2.58 mg/dL
1.07 mmol/L = 2.6 mg/dL
1.08 mmol/L = 2.62 mg/dL
1.09 mmol/L = 2.65 mg/dL
1.1 mmol/L = 2.67 mg/dL
1.11 mmol/L = 2.7 mg/dL
1.12 mmol/L = 2.72 mg/dL
1.13 mmol/L = 2.75 mg/dL
1.14 mmol/L = 2.77 mg/dL
1.15 mmol/L = 2.8 mg/dL
1.16 mmol/L = 2.82 mg/dL
1.17 mmol/L = 2.84 mg/dL
1.18 mmol/L = 2.87 mg/dL
1.19 mmol/L = 2.89 mg/dL
1.2 mmol/L = 2.92 mg/dL
1.21 mmol/L = 2.94 mg/dL
1.22 mmol/L = 2.97 mg/dL
1.23 mmol/L = 2.99 mg/dL
1.24 mmol/L = 3.01 mg/dL
1.25 mmol/L = 3.04 mg/dL
1.26 mmol/L = 3.06 mg/dL
1.27 mmol/L = 3.09 mg/dL
1.28 mmol/L = 3.11 mg/dL
1.29 mmol/L = 3.14 mg/dL
1.3 mmol/L = 3.16 mg/dL
1.31 mmol/L = 3.18 mg/dL
1.32 mmol/L = 3.21 mg/dL
1.33 mmol/L = 3.23 mg/dL
1.34 mmol/L = 3.26 mg/dL
1.35 mmol/L = 3.28 mg/dL
1.36 mmol/L = 3.31 mg/dL
1.37 mmol/L = 3.33 mg/dL
1.38 mmol/L = 3.35 mg/dL
1.39 mmol/L = 3.38 mg/dL
1.4 mmol/L = 3.4 mg/dL
1.41 mmol/L = 3.43 mg/dL
1.42 mmol/L = 3.45 mg/dL
1.43 mmol/L = 3.48 mg/dL
1.44 mmol/L = 3.5 mg/dL
1.45 mmol/L = 3.52 mg/dL
1.46 mmol/L = 3.55 mg/dL
1.47 mmol/L = 3.57 mg/dL
1.48 mmol/L = 3.6 mg/dL
1.49 mmol/L = 3.62 mg/dL
1.5 mmol/L = 3.65 mg/dL
1.51 mmol/L = 3.67 mg/dL
1.52 mmol/L = 3.69 mg/dL
1.53 mmol/L = 3.72 mg/dL
1.54 mmol/L = 3.74 mg/dL
1.55 mmol/L = 3.77 mg/dL
1.56 mmol/L = 3.79 mg/dL
1.57 mmol/L = 3.82 mg/dL
1.58 mmol/L = 3.84 mg/dL
1.59 mmol/L = 3.86 mg/dL
1.6 mmol/L = 3.89 mg/dL
1.61 mmol/L = 3.91 mg/dL
1.62 mmol/L = 3.94 mg/dL
1.63 mmol/L = 3.96 mg/dL
1.64 mmol/L = 3.99 mg/dL
1.65 mmol/L = 4.01 mg/dL
1.66 mmol/L = 4.03 mg/dL
1.67 mmol/L = 4.06 mg/dL
1.68 mmol/L = 4.08 mg/dL
1.69 mmol/L = 4.11 mg/dL
1.7 mmol/L = 4.13 mg/dL
1.71 mmol/L = 4.16 mg/dL
1.72 mmol/L = 4.18 mg/dL
1.73 mmol/L = 4.2 mg/dL
1.74 mmol/L = 4.23 mg/dL
1.75 mmol/L = 4.25 mg/dL
1.76 mmol/L = 4.28 mg/dL
1.77 mmol/L = 4.3 mg/dL
1.78 mmol/L = 4.33 mg/dL
1.79 mmol/L = 4.35 mg/dL
1.8 mmol/L = 4.37 mg/dL
1.81 mmol/L = 4.4 mg/dL
1.82 mmol/L = 4.42 mg/dL
1.83 mmol/L = 4.45 mg/dL
1.84 mmol/L = 4.47 mg/dL
1.85 mmol/L = 4.5 mg/dL
1.86 mmol/L = 4.52 mg/dL
1.87 mmol/L = 4.55 mg/dL
1.88 mmol/L = 4.57 mg/dL
1.89 mmol/L = 4.59 mg/dL
1.9 mmol/L = 4.62 mg/dL
1.91 mmol/L = 4.64 mg/dL
1.92 mmol/L = 4.67 mg/dL
1.93 mmol/L = 4.69 mg/dL
1.94 mmol/L = 4.72 mg/dL
1.95 mmol/L = 4.74 mg/dL
1.96 mmol/L = 4.76 mg/dL
1.97 mmol/L = 4.79 mg/dL
1.98 mmol/L = 4.81 mg/dL
1.99 mmol/L = 4.84 mg/dL
2 mmol/L = 4.86 mg/dL

About the test

Magnesium is a mineral that muscles, nerves and hundreds of enzymes need to work.

About the magnesium test · Magnesium Blood Test — MedlinePlus (U.S. National Library of Medicine).

Questions

Magnesium: what levels are typical?

MedlinePlus gives these typical ranges: Adults: 1.7–2.2 mg/dL (0.699–0.905 mmol/L). Labs differ in method, so your lab may use other ranges; the one on your report is the one to go by.

How do I convert magnesium from mg/dL to mmol/L?

Divide mg/dL by 2.4305. For example, 2 mg/dL is 0.82 mmol/L.

How do I convert magnesium from mmol/L to mg/dL?

Multiply mmol/L by 2.4305. For example, 0.9 mmol/L is 2.19 mg/dL.

Why is the factor 2.4305?

It follows from the molar mass of magnesium, 24.305 g/mol, and from the volume each unit counts in.

Why does my lab’s magnesium range differ from another lab’s?

Each lab sets its range for its own method and equipment, and many ranges differ by age and sex. That’s why a result is best read against the range printed on the same report.

Related conversions

Magnesium 2 mg/dL= 0.82 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: Magnesium (magnesium), molar mass 24.305 g/mol; the test description from MedlinePlus. Mention of a source doesn’t mean it endorses Soma.