Potassium: convert mmol/L to mg/dL
mg/dL = mmol/L × 3.909
Calculator
Enter a value in any unit and all other units fill in.
Conversion formulas
| mmol/L → mg/dL | mg/dL = mmol/L × 3.909 |
|---|---|
| mg/dL → mmol/L | mmol/L = mg/dL × 0.2558 |
Conversion table
Highlighted: values inside the adult reference range.
| mmol/L | mg/dL |
|---|---|
| 1 | 3.909 |
| 2 | 7.819 |
| 3 | 11.73 |
| 4 | 15.64 |
| 5 | 19.55 |
| 6 | 23.46 |
| 7 | 27.37 |
| 8 | 31.27 |
| 9 | 35.18 |
| 10 | 39.09 |
| 11 | 43 |
| 12 | 46.91 |
| 13 | 50.82 |
Reference range
3.5 – 5.3 mmol/L = 13.68 – 20.72 mg/dL
Source: Pathology Harmony Group (ACB, IBMS, RCPath): Agreed Adult Clinical Biochemistry Reference Intervals, January 2011 · Last reviewed: 2026-10-14