Neurology & psychiatry

MHPG (CSF): convert nmol/L to ng/mL

ng/mL = nmol/L × 0.1842

Calculator

Enter a value in any unit and all other units fill in.

nmol/L ng/mL

Conversion formulas

nmol/L → ng/mL	ng/mL = nmol/L × 0.1842
ng/mL → nmol/L	nmol/L = ng/mL × 5.43

Conversion table

Highlighted: values inside the adult reference range.

nmol/L	ng/mL
10	1.842
20	3.683
30	5.525
40	7.366
50	9.208
60	11.05
70	12.89
80	14.73
90	16.57
100	18.42
110	20.26
120	22.1
130	23.94
140	25.78
150	27.62

Reference range

28 – 60 nmol/L = 5.157 – 11.05 ng/mL

Source: Cerebrospinal fluid neurotransmitters, pterins, folates and amino acids in paediatric-onset epilepsies, Children 2025 (age-related reference ranges of the authors' laboratory, PMC) · Last reviewed: 2026-10-19

Frequently asked questions

How do I convert MHPG (CSF) from nmol/L to ng/mL?

ng/mL = nmol/L × 0.1842. For example, 40 nmol/L equals 7.37 ng/mL.

How many ng/mL are 40 nmol/L?

40 nmol/L equal 7.37 ng/mL (MHPG (CSF)).

How do I convert MHPG (CSF) from ng/mL back to nmol/L?

nmol/L = ng/mL × 5.43.

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