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Neurology & psychiatry

5-Hydroxytryptophan (CSF): convert nmol/L to ng/mL

ng/mL = nmol/L × 0.2202

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

Conversion formulas

nmol/L → ng/mLng/mL = nmol/L × 0.2202
ng/mL → nmol/Lnmol/L = ng/mL × 4.541

Conversion table

Highlighted: values inside the adult reference range.

nmol/Lng/mL
20.4404
40.8809
61.321
81.762
102.202
122.643
143.083
163.523
183.964
204.404
224.845
245.285

Reference range

0 – 10 nmol/L = 0 – 2.202 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 5-Hydroxytryptophan (CSF) from nmol/L to ng/mL?

ng/mL = nmol/L × 0.2202. For example, 4 nmol/L equals 0.881 ng/mL.

How many ng/mL are 4 nmol/L?

4 nmol/L equal 0.881 ng/mL (5-Hydroxytryptophan (CSF)).

How do I convert 5-Hydroxytryptophan (CSF) from ng/mL back to nmol/L?

nmol/L = ng/mL × 4.541.

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