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Free Water Deficit Calculator

Calculate your free water deficit

What is free water deficit?

When there is not enough free water in the body, it can lead to an increase of sodium in the blood, a condition known as hypernatremia. The free water deficit is the amount of water the body lacks that has caused hypernatremia. The free water deficit calculation is used to estimate the amount of water replacement needed to correct hypernatremia.

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Current Na mg/dL
Ideal Na mg/dL
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Free Water Deficit liters

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