C-Peptide unit converter
Convert C-Peptide between ng/mL, nmol/L and pmol/L. Type in either box. The factors come from our catalog and are checked by code.
AI-verified against cited sources. Awaiting expert reviewLast reviewed 2026-10-03
1 ng/mL = 0.3311 nmol/L. Nothing you type here leaves your browser.
The conversion
- 1 ng/mL = 0.3311 nmol/LFrom ng/mL to nmol/L: divide by 3.02. Back again: multiply by 3.02.
- 1 ng/mL = 331.1 pmol/LFrom ng/mL to pmol/L: multiply by 331.1. Back again: divide by 331.1.
Mass and molar units are linked by the molecular weight: 3,020.3 g/mol (human C-peptide, C129H211N35O48 (PubChem CID 16157840)). Source: PubChem, National Library of Medicine.
Common values
From zero to about twice the usual upper limit, plus the usual limits themselves.
| ng/mL | nmol/L | pmol/L |
|---|---|---|
| 0.8 | 0.26 | 265 |
| 1 | 0.33 | 331 |
| 2 | 0.66 | 662 |
| 3 | 0.99 | 993 |
| 3.9 | 1.29 | 1,291 |
| 4 | 1.32 | 1,324 |
| 5 | 1.66 | 1,655 |
| 6 | 1.99 | 1,987 |
| 7 | 2.32 | 2,318 |
Usual ranges in each unit
What labs print as the reference range, by who was tested. Sources for each range are on the C-Peptide page.
| Who | ng/mL | nmol/L | pmol/L |
|---|---|---|---|
| Adults | 0.8–3.9 | 0.26–1.27 | 265–1,275 |