Calcium: mg/dL to mmol/L

US labs print calcium in mg/dL, most European labs in mmol/L. To convert, divide mg/dL by 4.0078; to go back, multiply mmol/L by 4.0078.

Value

mg/dL

Same value in2.37mmol/L

mmol/L = mg/dL ÷ 4.0078 · molar mass 40.078 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 ÷ 4.0078
mmol/L → mg/dL: mg/dL = mmol/L × 4.0078
Where 4.0078 comes from: mg/dL counts the weight of calcium in a volume of blood, mmol/L the number of molecules. One mole of calcium weighs 40.078 g; with that and the difference in volume, one mmol/L is 4.0078 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	8.8–10.3	2.2–2.57

Source: Calcium 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
7.5 mg/dL	1.87 mmol/L
8 mg/dL	2 mmol/L
8.5 mg/dL	2.12 mmol/L
9 mg/dL	2.25 mmol/L
9.5 mg/dL	2.37 mmol/L
10 mg/dL	2.5 mmol/L
10.5 mg/dL	2.62 mmol/L
11 mg/dL	2.74 mmol/L
11.5 mg/dL	2.87 mmol/L

mmol/L	mg/dL
1.9 mmol/L	7.61 mg/dL
2 mmol/L	8.02 mg/dL
2.1 mmol/L	8.42 mg/dL
2.2 mmol/L	8.82 mg/dL
2.3 mmol/L	9.22 mg/dL
2.4 mmol/L	9.62 mg/dL
2.5 mmol/L	10 mg/dL
2.6 mmol/L	10.4 mg/dL
2.7 mmol/L	10.8 mg/dL
2.8 mmol/L	11.2 mg/dL
2.9 mmol/L	11.6 mg/dL

Show all 101 values: 5–15 mg/dL in mmol/L

5 mg/dL = 1.25 mmol/L
5.1 mg/dL = 1.27 mmol/L
5.2 mg/dL = 1.3 mmol/L
5.3 mg/dL = 1.32 mmol/L
5.4 mg/dL = 1.35 mmol/L
5.5 mg/dL = 1.37 mmol/L
5.6 mg/dL = 1.4 mmol/L
5.7 mg/dL = 1.42 mmol/L
5.8 mg/dL = 1.45 mmol/L
5.9 mg/dL = 1.47 mmol/L
6 mg/dL = 1.5 mmol/L
6.1 mg/dL = 1.52 mmol/L
6.2 mg/dL = 1.55 mmol/L
6.3 mg/dL = 1.57 mmol/L
6.4 mg/dL = 1.6 mmol/L
6.5 mg/dL = 1.62 mmol/L
6.6 mg/dL = 1.65 mmol/L
6.7 mg/dL = 1.67 mmol/L
6.8 mg/dL = 1.7 mmol/L
6.9 mg/dL = 1.72 mmol/L
7 mg/dL = 1.75 mmol/L
7.1 mg/dL = 1.77 mmol/L
7.2 mg/dL = 1.8 mmol/L
7.3 mg/dL = 1.82 mmol/L
7.4 mg/dL = 1.85 mmol/L
7.5 mg/dL = 1.87 mmol/L
7.6 mg/dL = 1.9 mmol/L
7.7 mg/dL = 1.92 mmol/L
7.8 mg/dL = 1.95 mmol/L
7.9 mg/dL = 1.97 mmol/L
8 mg/dL = 2 mmol/L
8.1 mg/dL = 2.02 mmol/L
8.2 mg/dL = 2.05 mmol/L
8.3 mg/dL = 2.07 mmol/L
8.4 mg/dL = 2.1 mmol/L
8.5 mg/dL = 2.12 mmol/L
8.6 mg/dL = 2.15 mmol/L
8.7 mg/dL = 2.17 mmol/L
8.8 mg/dL = 2.2 mmol/L
8.9 mg/dL = 2.22 mmol/L
9 mg/dL = 2.25 mmol/L
9.1 mg/dL = 2.27 mmol/L
9.2 mg/dL = 2.3 mmol/L
9.3 mg/dL = 2.32 mmol/L
9.4 mg/dL = 2.35 mmol/L
9.5 mg/dL = 2.37 mmol/L
9.6 mg/dL = 2.4 mmol/L
9.7 mg/dL = 2.42 mmol/L
9.8 mg/dL = 2.45 mmol/L
9.9 mg/dL = 2.47 mmol/L
10 mg/dL = 2.5 mmol/L
10.1 mg/dL = 2.52 mmol/L
10.2 mg/dL = 2.55 mmol/L
10.3 mg/dL = 2.57 mmol/L
10.4 mg/dL = 2.59 mmol/L
10.5 mg/dL = 2.62 mmol/L
10.6 mg/dL = 2.64 mmol/L
10.7 mg/dL = 2.67 mmol/L
10.8 mg/dL = 2.69 mmol/L
10.9 mg/dL = 2.72 mmol/L
11 mg/dL = 2.74 mmol/L
11.1 mg/dL = 2.77 mmol/L
11.2 mg/dL = 2.79 mmol/L
11.3 mg/dL = 2.82 mmol/L
11.4 mg/dL = 2.84 mmol/L
11.5 mg/dL = 2.87 mmol/L
11.6 mg/dL = 2.89 mmol/L
11.7 mg/dL = 2.92 mmol/L
11.8 mg/dL = 2.94 mmol/L
11.9 mg/dL = 2.97 mmol/L
12 mg/dL = 2.99 mmol/L
12.1 mg/dL = 3.02 mmol/L
12.2 mg/dL = 3.04 mmol/L
12.3 mg/dL = 3.07 mmol/L
12.4 mg/dL = 3.09 mmol/L
12.5 mg/dL = 3.12 mmol/L
12.6 mg/dL = 3.14 mmol/L
12.7 mg/dL = 3.17 mmol/L
12.8 mg/dL = 3.19 mmol/L
12.9 mg/dL = 3.22 mmol/L
13 mg/dL = 3.24 mmol/L
13.1 mg/dL = 3.27 mmol/L
13.2 mg/dL = 3.29 mmol/L
13.3 mg/dL = 3.32 mmol/L
13.4 mg/dL = 3.34 mmol/L
13.5 mg/dL = 3.37 mmol/L
13.6 mg/dL = 3.39 mmol/L
13.7 mg/dL = 3.42 mmol/L
13.8 mg/dL = 3.44 mmol/L
13.9 mg/dL = 3.47 mmol/L
14 mg/dL = 3.49 mmol/L
14.1 mg/dL = 3.52 mmol/L
14.2 mg/dL = 3.54 mmol/L
14.3 mg/dL = 3.57 mmol/L
14.4 mg/dL = 3.59 mmol/L
14.5 mg/dL = 3.62 mmol/L
14.6 mg/dL = 3.64 mmol/L
14.7 mg/dL = 3.67 mmol/L
14.8 mg/dL = 3.69 mmol/L
14.9 mg/dL = 3.72 mmol/L
15 mg/dL = 3.74 mmol/L

Show all 276 values: 1–3.75 mmol/L in mg/dL

1 mmol/L = 4.01 mg/dL
1.01 mmol/L = 4.05 mg/dL
1.02 mmol/L = 4.09 mg/dL
1.03 mmol/L = 4.13 mg/dL
1.04 mmol/L = 4.17 mg/dL
1.05 mmol/L = 4.21 mg/dL
1.06 mmol/L = 4.25 mg/dL
1.07 mmol/L = 4.29 mg/dL
1.08 mmol/L = 4.33 mg/dL
1.09 mmol/L = 4.37 mg/dL
1.1 mmol/L = 4.41 mg/dL
1.11 mmol/L = 4.45 mg/dL
1.12 mmol/L = 4.49 mg/dL
1.13 mmol/L = 4.53 mg/dL
1.14 mmol/L = 4.57 mg/dL
1.15 mmol/L = 4.61 mg/dL
1.16 mmol/L = 4.65 mg/dL
1.17 mmol/L = 4.69 mg/dL
1.18 mmol/L = 4.73 mg/dL
1.19 mmol/L = 4.77 mg/dL
1.2 mmol/L = 4.81 mg/dL
1.21 mmol/L = 4.85 mg/dL
1.22 mmol/L = 4.89 mg/dL
1.23 mmol/L = 4.93 mg/dL
1.24 mmol/L = 4.97 mg/dL
1.25 mmol/L = 5.01 mg/dL
1.26 mmol/L = 5.05 mg/dL
1.27 mmol/L = 5.09 mg/dL
1.28 mmol/L = 5.13 mg/dL
1.29 mmol/L = 5.17 mg/dL
1.3 mmol/L = 5.21 mg/dL
1.31 mmol/L = 5.25 mg/dL
1.32 mmol/L = 5.29 mg/dL
1.33 mmol/L = 5.33 mg/dL
1.34 mmol/L = 5.37 mg/dL
1.35 mmol/L = 5.41 mg/dL
1.36 mmol/L = 5.45 mg/dL
1.37 mmol/L = 5.49 mg/dL
1.38 mmol/L = 5.53 mg/dL
1.39 mmol/L = 5.57 mg/dL
1.4 mmol/L = 5.61 mg/dL
1.41 mmol/L = 5.65 mg/dL
1.42 mmol/L = 5.69 mg/dL
1.43 mmol/L = 5.73 mg/dL
1.44 mmol/L = 5.77 mg/dL
1.45 mmol/L = 5.81 mg/dL
1.46 mmol/L = 5.85 mg/dL
1.47 mmol/L = 5.89 mg/dL
1.48 mmol/L = 5.93 mg/dL
1.49 mmol/L = 5.97 mg/dL
1.5 mmol/L = 6.01 mg/dL
1.51 mmol/L = 6.05 mg/dL
1.52 mmol/L = 6.09 mg/dL
1.53 mmol/L = 6.13 mg/dL
1.54 mmol/L = 6.17 mg/dL
1.55 mmol/L = 6.21 mg/dL
1.56 mmol/L = 6.25 mg/dL
1.57 mmol/L = 6.29 mg/dL
1.58 mmol/L = 6.33 mg/dL
1.59 mmol/L = 6.37 mg/dL
1.6 mmol/L = 6.41 mg/dL
1.61 mmol/L = 6.45 mg/dL
1.62 mmol/L = 6.49 mg/dL
1.63 mmol/L = 6.53 mg/dL
1.64 mmol/L = 6.57 mg/dL
1.65 mmol/L = 6.61 mg/dL
1.66 mmol/L = 6.65 mg/dL
1.67 mmol/L = 6.69 mg/dL
1.68 mmol/L = 6.73 mg/dL
1.69 mmol/L = 6.77 mg/dL
1.7 mmol/L = 6.81 mg/dL
1.71 mmol/L = 6.85 mg/dL
1.72 mmol/L = 6.89 mg/dL
1.73 mmol/L = 6.93 mg/dL
1.74 mmol/L = 6.97 mg/dL
1.75 mmol/L = 7.01 mg/dL
1.76 mmol/L = 7.05 mg/dL
1.77 mmol/L = 7.09 mg/dL
1.78 mmol/L = 7.13 mg/dL
1.79 mmol/L = 7.17 mg/dL
1.8 mmol/L = 7.21 mg/dL
1.81 mmol/L = 7.25 mg/dL
1.82 mmol/L = 7.29 mg/dL
1.83 mmol/L = 7.33 mg/dL
1.84 mmol/L = 7.37 mg/dL
1.85 mmol/L = 7.41 mg/dL
1.86 mmol/L = 7.45 mg/dL
1.87 mmol/L = 7.49 mg/dL
1.88 mmol/L = 7.53 mg/dL
1.89 mmol/L = 7.57 mg/dL
1.9 mmol/L = 7.61 mg/dL
1.91 mmol/L = 7.65 mg/dL
1.92 mmol/L = 7.69 mg/dL
1.93 mmol/L = 7.74 mg/dL
1.94 mmol/L = 7.78 mg/dL
1.95 mmol/L = 7.82 mg/dL
1.96 mmol/L = 7.86 mg/dL
1.97 mmol/L = 7.9 mg/dL
1.98 mmol/L = 7.94 mg/dL
1.99 mmol/L = 7.98 mg/dL
2 mmol/L = 8.02 mg/dL
2.01 mmol/L = 8.06 mg/dL
2.02 mmol/L = 8.1 mg/dL
2.03 mmol/L = 8.14 mg/dL
2.04 mmol/L = 8.18 mg/dL
2.05 mmol/L = 8.22 mg/dL
2.06 mmol/L = 8.26 mg/dL
2.07 mmol/L = 8.3 mg/dL
2.08 mmol/L = 8.34 mg/dL
2.09 mmol/L = 8.38 mg/dL
2.1 mmol/L = 8.42 mg/dL
2.11 mmol/L = 8.46 mg/dL
2.12 mmol/L = 8.5 mg/dL
2.13 mmol/L = 8.54 mg/dL
2.14 mmol/L = 8.58 mg/dL
2.15 mmol/L = 8.62 mg/dL
2.16 mmol/L = 8.66 mg/dL
2.17 mmol/L = 8.7 mg/dL
2.18 mmol/L = 8.74 mg/dL
2.19 mmol/L = 8.78 mg/dL
2.2 mmol/L = 8.82 mg/dL
2.21 mmol/L = 8.86 mg/dL
2.22 mmol/L = 8.9 mg/dL
2.23 mmol/L = 8.94 mg/dL
2.24 mmol/L = 8.98 mg/dL
2.25 mmol/L = 9.02 mg/dL
2.26 mmol/L = 9.06 mg/dL
2.27 mmol/L = 9.1 mg/dL
2.28 mmol/L = 9.14 mg/dL
2.29 mmol/L = 9.18 mg/dL
2.3 mmol/L = 9.22 mg/dL
2.31 mmol/L = 9.26 mg/dL
2.32 mmol/L = 9.3 mg/dL
2.33 mmol/L = 9.34 mg/dL
2.34 mmol/L = 9.38 mg/dL
2.35 mmol/L = 9.42 mg/dL
2.36 mmol/L = 9.46 mg/dL
2.37 mmol/L = 9.5 mg/dL
2.38 mmol/L = 9.54 mg/dL
2.39 mmol/L = 9.58 mg/dL
2.4 mmol/L = 9.62 mg/dL
2.41 mmol/L = 9.66 mg/dL
2.42 mmol/L = 9.7 mg/dL
2.43 mmol/L = 9.74 mg/dL
2.44 mmol/L = 9.78 mg/dL
2.45 mmol/L = 9.82 mg/dL
2.46 mmol/L = 9.86 mg/dL
2.47 mmol/L = 9.9 mg/dL
2.48 mmol/L = 9.94 mg/dL
2.49 mmol/L = 9.98 mg/dL
2.5 mmol/L = 10 mg/dL
2.51 mmol/L = 10.1 mg/dL
2.52 mmol/L = 10.1 mg/dL
2.53 mmol/L = 10.1 mg/dL
2.54 mmol/L = 10.2 mg/dL
2.55 mmol/L = 10.2 mg/dL
2.56 mmol/L = 10.3 mg/dL
2.57 mmol/L = 10.3 mg/dL
2.58 mmol/L = 10.3 mg/dL
2.59 mmol/L = 10.4 mg/dL
2.6 mmol/L = 10.4 mg/dL
2.61 mmol/L = 10.5 mg/dL
2.62 mmol/L = 10.5 mg/dL
2.63 mmol/L = 10.5 mg/dL
2.64 mmol/L = 10.6 mg/dL
2.65 mmol/L = 10.6 mg/dL
2.66 mmol/L = 10.7 mg/dL
2.67 mmol/L = 10.7 mg/dL
2.68 mmol/L = 10.7 mg/dL
2.69 mmol/L = 10.8 mg/dL
2.7 mmol/L = 10.8 mg/dL
2.71 mmol/L = 10.9 mg/dL
2.72 mmol/L = 10.9 mg/dL
2.73 mmol/L = 10.9 mg/dL
2.74 mmol/L = 11 mg/dL
2.75 mmol/L = 11 mg/dL
2.76 mmol/L = 11.1 mg/dL
2.77 mmol/L = 11.1 mg/dL
2.78 mmol/L = 11.1 mg/dL
2.79 mmol/L = 11.2 mg/dL
2.8 mmol/L = 11.2 mg/dL
2.81 mmol/L = 11.3 mg/dL
2.82 mmol/L = 11.3 mg/dL
2.83 mmol/L = 11.3 mg/dL
2.84 mmol/L = 11.4 mg/dL
2.85 mmol/L = 11.4 mg/dL
2.86 mmol/L = 11.5 mg/dL
2.87 mmol/L = 11.5 mg/dL
2.88 mmol/L = 11.5 mg/dL
2.89 mmol/L = 11.6 mg/dL
2.9 mmol/L = 11.6 mg/dL
2.91 mmol/L = 11.7 mg/dL
2.92 mmol/L = 11.7 mg/dL
2.93 mmol/L = 11.7 mg/dL
2.94 mmol/L = 11.8 mg/dL
2.95 mmol/L = 11.8 mg/dL
2.96 mmol/L = 11.9 mg/dL
2.97 mmol/L = 11.9 mg/dL
2.98 mmol/L = 11.9 mg/dL
2.99 mmol/L = 12 mg/dL
3 mmol/L = 12 mg/dL
3.01 mmol/L = 12.1 mg/dL
3.02 mmol/L = 12.1 mg/dL
3.03 mmol/L = 12.1 mg/dL
3.04 mmol/L = 12.2 mg/dL
3.05 mmol/L = 12.2 mg/dL
3.06 mmol/L = 12.3 mg/dL
3.07 mmol/L = 12.3 mg/dL
3.08 mmol/L = 12.3 mg/dL
3.09 mmol/L = 12.4 mg/dL
3.1 mmol/L = 12.4 mg/dL
3.11 mmol/L = 12.5 mg/dL
3.12 mmol/L = 12.5 mg/dL
3.13 mmol/L = 12.5 mg/dL
3.14 mmol/L = 12.6 mg/dL
3.15 mmol/L = 12.6 mg/dL
3.16 mmol/L = 12.7 mg/dL
3.17 mmol/L = 12.7 mg/dL
3.18 mmol/L = 12.7 mg/dL
3.19 mmol/L = 12.8 mg/dL
3.2 mmol/L = 12.8 mg/dL
3.21 mmol/L = 12.9 mg/dL
3.22 mmol/L = 12.9 mg/dL
3.23 mmol/L = 12.9 mg/dL
3.24 mmol/L = 13 mg/dL
3.25 mmol/L = 13 mg/dL
3.26 mmol/L = 13.1 mg/dL
3.27 mmol/L = 13.1 mg/dL
3.28 mmol/L = 13.1 mg/dL
3.29 mmol/L = 13.2 mg/dL
3.3 mmol/L = 13.2 mg/dL
3.31 mmol/L = 13.3 mg/dL
3.32 mmol/L = 13.3 mg/dL
3.33 mmol/L = 13.3 mg/dL
3.34 mmol/L = 13.4 mg/dL
3.35 mmol/L = 13.4 mg/dL
3.36 mmol/L = 13.5 mg/dL
3.37 mmol/L = 13.5 mg/dL
3.38 mmol/L = 13.5 mg/dL
3.39 mmol/L = 13.6 mg/dL
3.4 mmol/L = 13.6 mg/dL
3.41 mmol/L = 13.7 mg/dL
3.42 mmol/L = 13.7 mg/dL
3.43 mmol/L = 13.7 mg/dL
3.44 mmol/L = 13.8 mg/dL
3.45 mmol/L = 13.8 mg/dL
3.46 mmol/L = 13.9 mg/dL
3.47 mmol/L = 13.9 mg/dL
3.48 mmol/L = 13.9 mg/dL
3.49 mmol/L = 14 mg/dL
3.5 mmol/L = 14 mg/dL
3.51 mmol/L = 14.1 mg/dL
3.52 mmol/L = 14.1 mg/dL
3.53 mmol/L = 14.1 mg/dL
3.54 mmol/L = 14.2 mg/dL
3.55 mmol/L = 14.2 mg/dL
3.56 mmol/L = 14.3 mg/dL
3.57 mmol/L = 14.3 mg/dL
3.58 mmol/L = 14.3 mg/dL
3.59 mmol/L = 14.4 mg/dL
3.6 mmol/L = 14.4 mg/dL
3.61 mmol/L = 14.5 mg/dL
3.62 mmol/L = 14.5 mg/dL
3.63 mmol/L = 14.5 mg/dL
3.64 mmol/L = 14.6 mg/dL
3.65 mmol/L = 14.6 mg/dL
3.66 mmol/L = 14.7 mg/dL
3.67 mmol/L = 14.7 mg/dL
3.68 mmol/L = 14.7 mg/dL
3.69 mmol/L = 14.8 mg/dL
3.7 mmol/L = 14.8 mg/dL
3.71 mmol/L = 14.9 mg/dL
3.72 mmol/L = 14.9 mg/dL
3.73 mmol/L = 14.9 mg/dL
3.74 mmol/L = 15 mg/dL
3.75 mmol/L = 15 mg/dL

About the test

Calcium is a mineral for bones, muscles and nerves. Part of it is bound to albumin, so the two are often looked at together.

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

Questions

Calcium: what levels are typical?

MedlinePlus gives these typical ranges: Adults: 8.8–10.3 mg/dL (2.2–2.57 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 calcium from mg/dL to mmol/L?

Divide mg/dL by 4.0078. For example, 9.5 mg/dL is 2.37 mmol/L.

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

Multiply mmol/L by 4.0078. For example, 2.4 mmol/L is 9.62 mg/dL.

Why is the factor 4.0078?

It follows from the molar mass of calcium, 40.078 g/mol, and from the volume each unit counts in.

Why does my lab’s calcium 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

Calcium 9.5 mg/dL= 2.37 mmol/L

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Sources: PubChem: Calcium (calcium), molar mass 40.078 g/mol; the test description from MedlinePlus. Mention of a source doesn’t mean it endorses Soma.