Free Water Deficit Calculator

The hypernatremia is a high level of sodium ion in the blood. The free water deficit is used to access the amount of water replacement needed to correct hypernatremia. Our tool will guide you on how to calculate the free water deficit for people with hypernatraemia disorder. Use our online free water deficit calculator to determine the free water deficit hyponatremia based on the patient's weight. Select the sex, age group, weight, sodium and sodium desired value in tool to compute results.

weight
mEq/L
mEq/L
l

The hypernatremia is a high level of sodium ion in the blood. The free water deficit is used to access the amount of water replacement needed to correct hypernatremia. Our tool will guide you on how to calculate the free water deficit for people with hypernatraemia disorder. Use our online free water deficit calculator to determine the free water deficit hyponatremia based on the patient's weight. Select the sex, age group, weight, sodium and sodium desired value in tool to compute results.

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Formula:

FW Deficit (Adult Male) = 0.6 x Weight x ( Current Sodium(Na) / Desired Sodium - 1 ) FW Deficit (Adult Female) = 0.5 x Weight x ( Current Sodium(Na) / Desired Sodium - 1 ) FW Deficit (Elderly Male) = 0.5 x Weight x ( Current Sodium(Na) / Desired Sodium - 1 ) FW Deficit (Elderly Female) = 0.45 x Weight x ( Current Sodium(Na) / Desired Sodium - 1 ) FW Deficit (Child) = 0.6 x Weight x ( Current Sodium(Na) / Desired Sodium - 1 )

Example:

A Find the free water deficit for a child, whose weight is 50kg, current sodium level is 150 mEq/L and the sodium desired is 140 mEq/L?

Solution:

Free water deficit = 0.6 x 15 x (230 / 140 -1)
= 2.1429 l

Note :This statistics calculator is presented for your own personal use and is to be used as a guide only. Medical and other decisions should NOT be based on the results of this calculator. Although this calculator has been tested, we cannot guarantee the accuracy of its calculations or results.

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