MyBloodTest

Biomarkers

Home

›

Biomarkers

›

Potassium (K)

Blood

Potassium (K)

COMMON RANGE

3.6 – 5.2

mEq/L

3.1

5.5

Mayo Clinic Laboratories

Adult

↗

See all sources ↓

CONVERT & COMPARE

mEq/L

4.4

mmol/L

Reference ranges across 10+ sources

Adult reference ranges from 11 entries across 11 trusted sources, shown in mEq/L. Compare side-by-side.

SOURCE

SEX

AGE

RANGE

VISUAL

CITE

ARUP Laboratories

All

≥18

3.3 – 5 mEq/L

↗

Mayo Clinic Laboratories

All

≥18

3.6 – 5.2 mEq/L

↗

Quest Diagnostics

All

≥18

3.5 – 5.2 mEq/L

↗

Labcorp

All

≥18

3.5 – 5.2 mEq/L

↗

World Health Organization

All

≥18

3.5 – 5 mEq/L

↗

RCPA / AACB Australasian Harmonised Reference Intervals

All

≥18

3.5 – 5.2 mEq/L

↗

Nordic Reference Interval Project

All

≥18

3.6 – 4.6 mEq/L

↗

UK Pathology Harmony

All

≥18

3.5 – 5.3 mEq/L

JSCC / JAMT Japan

All

≥18

3.6 – 4.8 mEq/L

Turkey Nationwide Reference Intervals

All

≥18

3.5 – 5.1 mEq/L

NUMBER — Dutch Reference Value Study

All

≥18

3.4 – 4.9 mEq/L

↗

ARUP Laboratories

All · ≥18

↗

3.3 – 5 mEq/L

Mayo Clinic Laboratories

All · ≥18

↗

3.6 – 5.2 mEq/L

Quest Diagnostics

All · ≥18

↗

3.5 – 5.2 mEq/L

Labcorp

All · ≥18

↗

3.5 – 5.2 mEq/L

World Health Organization

All · ≥18

↗

3.5 – 5 mEq/L

RCPA / AACB Australasian Harmonised Reference Intervals

All · ≥18

↗

3.5 – 5.2 mEq/L

Nordic Reference Interval Project

All · ≥18

↗

3.6 – 4.6 mEq/L

UK Pathology Harmony

All · ≥18

3.5 – 5.3 mEq/L

JSCC / JAMT Japan

All · ≥18

3.6 – 4.8 mEq/L

Turkey Nationwide Reference Intervals

All · ≥18

3.5 – 5.1 mEq/L

NUMBER — Dutch Reference Value Study

All · ≥18

↗

3.4 – 4.9 mEq/L

Related biomarkers

Often tested alongside potassium (k) or part of the same panel.

White Blood Cells (WBC)

Blood

Red Blood Cells (RBC)

Blood

Hemoglobin (Hgb)

Blood

Hematocrit (Hct)

Blood

Platelets (PLT)

Blood

Mean Corpuscular Volume (MCV)

Blood

Sources

ARUP Laboratories

Mayo Clinic Laboratories

Quest Diagnostics

Labcorp

World Health Organization

RCPA / AACB Australasian Harmonised Reference Intervals

Nordic Reference Interval Project

UK Pathology Harmony

JSCC / JAMT Japan

Turkey Nationwide Reference Intervals

NUMBER — Dutch Reference Value Study

Last updated 2026-05-02

This page aggregates publicly available reference data and clinical information from Mayo Clinic Laboratories and other sources. For general wellness information only — not medical advice. For diagnosis or treatment of any condition, talk to a qualified clinician.

Track your potassium (k) in MyBloodTest

Instant lab report scanning, personalized wellness insights, automatic wellness app syncing. All in one app.

Download on the

App Store

Get it on

Google Play

Free · iOS · Android · Web

MyBloodTest