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#1
11-11-2008, 09:29 PM
 Unregistered Guest Posts: n/a
Re: g/l to mmol/l conversion

Hi I am reading a paper where they talk about blood glucose values being below 1.10g/l - please can you tell me how to convert this to mmol/l
#2
11-12-2008, 09:24 PM
 Unregistered Guest Posts: n/a
Re: g/l to mmol/l conversion

Hi I am reading a paper where they talk about blood glucose values being below 1.10g/l - please can you tell me how to convert this to mmol/l

To convert mmol/l of glucose to mg/dl, multiply by 18.

To convert mg/dl of glucose to mmol/l, divide by 18 or multiply by 0.055.

1.10g/l=1100mg/l=1100mg/10dl=110mg/dl

110*0.055=6.05 mmol/l
1.1g/l=6.05 mmol/l
#3
11-13-2008, 02:32 PM
 Mrs X can't count, can't spell! Join Date: Feb 2006 Location: New Zealand Posts: 2,436 Rep Power: 12
Re: g/l to mmol/l conversion

Quote:
 Originally Posted by Unregistered Hi I am reading a paper where they talk about blood glucose values being below 1.10g/l - please can you tell me how to convert this to mmol/l To convert mmol/l of glucose to mg/dl, multiply by 18. To convert mg/dl of glucose to mmol/l, divide by 18 or multiply by 0.055. 1.10g/l=1100mg/l=1100mg/10dl=110mg/dl 110*0.055=6.05 mmol/l 1.1g/l=6.05 mmol/l
18 is the molar mass of water (2 x 1 + 16 = 18) H2O, H=2g/mol, O=18g/mol

Glucose is different (CxHyOz). Use C=12g/mol, H=1g/mol, O=16g/mol). These values are near enough, but not exact. Use a periodic table if you need the values to more accurate figures.

There are 100mL in 1dL, and 100mL in 1L
#4
11-13-2008, 03:22 PM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,536 Rep Power: 19
Re: g/l to mmol/l conversion

Quote:
 Originally Posted by Mrs X 18 is the molar mass of water (2 x 1 + 16 = 18) H2O, H=2g/mol, O=18g/mol Glucose is different (CxHyOz). Use C=12g/mol, H=1g/mol, O=16g/mol). These values are near enough, but not exact. Use a periodic table if you need the values to more accurate figures. There are 100mL in 1dL, and 100mL in 1L
It's a trick. The MW of glucose is 180 Da, but the change from liter to deciliter throws in a factor of 10, so the composite factor is 18. (I was confused by it in a previous note and had to work my way through the numbers.)
#5
11-13-2008, 04:09 PM
 Mrs X can't count, can't spell! Join Date: Feb 2006 Location: New Zealand Posts: 2,436 Rep Power: 12
Re: g/l to mmol/l conversion

The original question asks about g/L to mmol/L, so the 18 and dL were very confusing. I didn't help either, sorry.

OP, you need to find out the molecular weight of your glucose (180g/mol??).

This means that a solution with 180g/L is a 1Msolution.

A solution with 180mg/L is a 1mMsolution

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