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    Transtubular Potassium Gradient (TTKG)

    May help in assessment of hyperkalemia or hypokalemia.
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    When to Use
    Pearls/Pitfalls

    Patients with hyper- or hypokalemia (defined as K+ <3.5 or >5.0 mEq/L in this calculator).

    TTKG is sometimes criticized for being inaccurate, particularly in the evaluation of hyperkalemia. 

    mEq/L
    mEq/L
    mOsm/kg
    mOsm/kg

    Result:

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    Next Steps
    Evidence
    Creator Insights

    Advice

    Use clinical judgment in correcting hyper- or hypokalemia, and as always, never rely solely on a calculator to make decisions.

    About the Creator
    Dr. Mitchell L. Halperin
    Are you Dr. Mitchell L. Halperin?