Kidney
Potassium
An electrolyte with a narrow safe window — both ends affect heart rhythm. Higher results are the ones to watch. A common adult reference interval is 3.5–5.2 mmol/L.
Typical adult range
- Reference interval
- 3.5–5.2 mmol/L
- Often-cited tighter window
- 3.8–4.8 mmol/L
Standard adult laboratory reference interval. Your own lab's printed range is the one that applies to your result.
These are commonly described physiological relationships, shared for education. They are not a diagnosis and cannot account for your medications, history, or symptoms — discuss your results with a licensed clinician.
Watching Potassium over time?
Dose Compass charts each draw, flags meaningful moves, and helps you prepare questions for your clinician.
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