Potassium (K⁺)

🇺🇸 US Reference Range

3.5–5 mEq/L

Source: NBME

🇪🇺 EU Reference Range (SI Units)

3.5–5 mmol/L

Source: NBME

Mayo Clinic Reference Range

3.6–5.2 mmol/L

Source: Mayo Clinic

Note: Reference range for patients ≥1 year. <1 year: not established

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