What is a normal potassium level?
The short answer
A typical US lab prints a normal potassium range of 3.5–5.2 mmol/L. That range exists to catch disease, not to describe your best.
Nobody we follow has said what your potassium should be. It comes up on the shows, but never with a number.
What potassium measures
An electrolyte your nerves and heart muscle depend on.
Your body keeps it within tight limits because both high and low levels affect heart rhythm.
Checked against MedlinePlus — Potassium Blood Test.
Common questions
What is a normal potassium level?
Most US labs print 3.5–5.2 mmol/L. Your report grades you against that range. It exists to catch disease, not to describe your best.
What does your potassium number mean?
On a typical lab range, under 3.5 mmol/L is low, 3.5 to 5.2 is normal and over 5.2 is high. Your own report prints its range next to your number, and that is the one your lab uses. Nobody we follow has drawn a line inside that range.
What does the potassium test measure?
An electrolyte your nerves and heart muscle depend on. Your body keeps it within tight limits because both high and low levels affect heart rhythm.
Why is there no target here?
Because nobody we follow has named a number for potassium. If that changes, it will be here.