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    Maintenance Fluids Calculations

    Calculates maintenance fluid requirements by weight.
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    INSTRUCTIONS

    While originally derived in pediatric patients, this calculator is applicable to any age. Consider using ideal body weight in obese patients. If not calculating based on ideal body weight, use clinical judgment for dosing. A 1-liter bolus may be appropriate for most patients, such as overweight adolescents and adults.

    When to Use
    Why Use
    • Determining IV fluid rates for patients who are not taking oral fluids (either from vomiting or being NPO).
    • Determining IV fluid requirements for patients who are dehydrated or have insensible losses or third spacing.

    Weight-based dosing of fluids is important given the fact that a patient's total body water (and blood volume) are based on their weight.

    lbs

    Result:

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    Next Steps
    Evidence
    Creator Insights

    Advice

    Past, current, and future hydration status should always be considered when prescribing maintenance fluids, as under-dosing will lead to dehydration and renal insufficiency, and over-dosing may lead to fluid overload and edema in some patients.

    About the Creator
    Dr. Malcolm Holliday
    Are you Dr. Malcolm Holliday?