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Magnesium — mmol/L to mg/dL
Converts serum magnesium from mmol/L to mg/dL, the factor taken from its molar mass. One mmol/L is 2.4305 mg/dL.
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In short
To convert serum magnesium from mmol/L to mg/dL, multiply by 2.4305 — so one mmol/L is 2.4305 mg/dL, and one mg/dL is 0.411438 mmol/L. 1.8 mg/dL is 0.74 mmol/L; 2.0 mg/dL is 0.82 mmol/L; 2.4 mg/dL is 0.99 mmol/L. The factor comes from the molar mass, because magnesium has an atomic mass of 24.305 g/mol; that is why it differs for every analyte and why a single "lab unit converter" factor does not exist. Magnesium is reported in three units in common use — mg/dL, mmol/L and mEq/L — which is more than any other routine electrolyte, and the three differ by factors that are easy to mix up. Magnesium is divalent like calcium, so mEq/L is twice mmol/L. This converts units. It does not interpret results, does not compare your value against a reference interval, and is not a substitute for the clinician who ordered the test — reference intervals differ between laboratories, methods and populations.
How to use the Magnesium — mmol/L to mg/dL
- Type the value you want to convert.
- Pick the unit you are converting from and the unit you want.
- The converted value and the exact conversion factor are shown instantly.
About the Magnesium — mmol/L to mg/dL
Magnesium is reported in three units in common use — mg/dL, mmol/L and mEq/L — which is more than any other routine electrolyte, and the three differ by factors that are easy to mix up. Magnesium is divalent like calcium, so mEq/L is twice mmol/L.
What people use it for
- Reading a serum magnesium result issued in mmol/L when you are used to mg/dL.
- Comparing an old report with a new one after moving country or changing laboratory.
- Following a study or a guideline written in the other unit system.
Details
| This conversion | 1 mmol/L = 2.4305 mg/dL |
|---|---|
| Conventional unit | mg/dL — mg/dL in the US; mmol/L in the UK, Europe and Australia. mEq/L also appears, and like calcium it is double the mmol/L figure. |
| Factor | 1 mg/dL = 0.411438 mmol/L (divide by 2.4305 to go back) |
| Where it comes from | Molar mass: magnesium has an atomic mass of 24.305 g/mol |
| Worked examples | 1.8 mg/dL is 0.74 mmol/L; 2.0 mg/dL is 0.82 mmol/L; 2.4 mg/dL is 0.99 mmol/L |
| Privacy | The arithmetic runs in your browser. Nothing you type is sent anywhere or stored. |
The factor is printed on the page so the arithmetic can be checked rather than trusted. This converts units. It does not interpret results, does not compare your value against a reference interval, and is not a substitute for the clinician who ordered the test — reference intervals differ between laboratories, methods and populations.
Where this tool stops
This converts units. It does not interpret results, does not compare your value against a reference interval, and is not a substitute for the clinician who ordered the test — reference intervals differ between laboratories, methods and populations.
Frequently asked questions
My magnesium is 0.8 and my friend's is 2.0. Are they very different?
Probably not: 0.8 mmol/L and 2.0 mg/dL are close to the same amount. The mg/dL figure is roughly 2.4 times the mmol/L figure for magnesium, so numbers around 2 in one system and around 0.8 in the other describe similar results.
What is the exact factor?
One mmol/L is 2.4305 mg/dL, and the reverse is 0.411438. It is derived rather than looked up: magnesium has an atomic mass of 24.305 g/mol, and the conversion follows from that.
Does this tool tell me if my result is normal?
No. It converts a number between two units and stops there, on purpose. Reference intervals differ between laboratories and methods, and a single value means little without the rest of your results and the person who ordered them.
Do I need an account to use the Magnesium — mmol/L to mg/dL?
No charge and no sign-up. There is no free tier to run out of because there is no paid tier — inputtesthub.com is funded by advertising rather than by metering the page.
Can you see what I put into this page?
No. The Magnesium — mmol/L to mg/dL runs entirely in your browser using JavaScript. Because the work happens locally, the page also keeps working if your connection drops, and closing the tab is all it takes to discard everything.
When would I actually need the Magnesium — mmol/L to mg/dL?
In practice it gets used for three things: reading a serum magnesium result issued in mmol/L when you are used to mg/dL. Comparing an old report with a new one after moving country or changing laboratory. Following a study or a guideline written in the other unit system. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is there anything the Magnesium — mmol/L to mg/dL cannot do?
This converts units. It does not interpret results, does not compare your value against a reference interval, and is not a substitute for the clinician who ordered the test — reference intervals differ between laboratories, methods and populations. Knowing where a tool stops being trustworthy matters more than the cases where it works.
What figures does the Magnesium — mmol/L to mg/dL work from?
This conversion is 1 mmol/L = 2.4305 mg/dL. Conventional unit is mg/dL — mg/dL in the US; mmol/L in the UK, Europe and Australia. mEq/L also appears, and like calcium it is double the mmol/L figure.. Factor is 1 mg/dL = 0.411438 mmol/L (divide by 2.4305 to go back). These are printed on the page itself, so you do not have to take them on trust.
How precise is the result?
The calculation runs in double precision and the result is shown to ten significant figures, so converting a value and converting it back returns the original. What is displayed is rounded for readability; what is copied is not.
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