I need help to convert ng/mL to nmol/L
Convert ng/mL to nmol/L
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Re: Convert ng/mL to nmol/L
Originally posted by dr. bhavna sharmahey jus multiply by 2.496 ....i mean ng/ml is the conventional factor to measure 25 hydroxy vitamin d and nmol/L is de SI unit and 2.496 is the conversion factor....to reverse it jus divide bye 2.496
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Re: Convert ng/mL to nmol/L
Originally posted by Unregistered View Postneed to convert 5.7 nmol/lit is eqvivalent to how many ng/ml
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Re: Convert ng/mL to nmol/L
Originally posted by dr. bhavna sharma View Posthey jus multiply by 2.496 ....i mean ng/ml is the conventional factor to measure 25 hydroxy vitamin d and nmol/L is de SI unit and 2.496 is the conversion factor....to reverse it jus divide bye 2.496
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Re: Convert ng/mL to nmol/L
94 is quite high enough. 175 is dangerous. These sort of levels are pushed by people with an agenda.
See "Dietary Reference Intakes for Calcium and Vitamin D" from the US Institute of Medicine - a very high quality review.
Says 50nmol/L is sufficient.
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Re: Convert ng/mL to nmol/L
I just asked a lab that reported my Chromogranin A level as 13 NMOL/L if they could convert it to ng/mL for me so I could compare it to tests done 4 months ago at another lab, and they refused. I know that each lab uses a slightly different procedure, and they would not compare exactly, but it should give me a ballpark idea if my values are stable until the next time I am able to travel to the major oncology center. Can some one assist me?
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Re: Convert ng/mL to nmol/L
Originally posted by Unregistered View PostI just asked a lab that reported my Chromogranin A level as 13 NMOL/L if they could convert it to ng/mL for me so I could compare it to tests done 4 months ago at another lab, and they refused. I know that each lab uses a slightly different procedure, and they would not compare exactly, but it should give me a ballpark idea if my values are stable until the next time I am able to travel to the major oncology center. Can some one assist me?
First, there is no FDA approved test, so lab to lab variability is probably considerably higher than for most lab tests.
Second, to convert between moles and grams (regardless of prefixes), you have to know molecular weight. Most sources I found did not list it. One
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described it as a 49 kDa protein; I assume the chemical formula is not known exactly and that is an approximate molecular weight. It means the molar mass is 49 kg/mol.
Assuming this is (approximately) correct, the conversion is
13 nmol/L x 1 L/1000 mL x 49 kg/mol = 637 ng/mL.
Based on 2 digit precision of the raw data, that should be rounded to 640 ng/mL
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Re: Convert ng/mL to nmol/L
Thank you so much JohnS. I think you have probably come quite close, as my previous value was 550 ng/ml. This is good news, as I think it allows for variability between the labs, but is much less than my initial value before some treatment of 2180 ng/mL. I will keep the calculation method so I can figure this out in the future. I am learning more all the time. I appreciate your help.
Sue
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