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Diabetes & metabolism

C-peptide: convert nmol/L to ng/mL

ng/mL = nmol/L × 3.02

Calculator

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

Conversion formulas

nmol/L → ng/mLng/mL = nmol/L × 3.02
ng/mL → nmol/Lnmol/L = ng/mL × 0.3311

Conversion table

Highlighted: values inside the adult reference range.

nmol/Lng/mL
0.20.6041
0.41.208
0.61.812
0.82.416
13.02
1.23.624
1.44.228
1.64.832
1.85.437
26.041
2.26.645
2.47.249
2.67.853

Reference range

0.0993 – 1.093 nmol/L = 0.3 – 3.3 ng/mL

Source: MedlinePlus (NLM): Insulin C-peptide test · Last reviewed: 2026-10-14

Frequently asked questions

How do I convert C-peptide from nmol/L to ng/mL?

ng/mL = nmol/L × 3.02. For example, 0.6 nmol/L equals 1.81 ng/mL.

How many ng/mL are 0.6 nmol/L?

0.6 nmol/L equal 1.81 ng/mL (C-peptide).

How do I convert C-peptide from ng/mL back to nmol/L?

nmol/L = ng/mL × 0.3311.

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