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Potassium Replacement Calculator

Potassium replacement calculator

Created by Team y2calculate.com

Content written by Maya Bennett

Reviewed by  Sajid khan (Head of content)

Fact checked 🔍✓

Published: December 2, 2023 → Last Updated: February 3, 2024

How to use potassium replacement calculator

The Potassium Repletion Calculator uses the formula:

\[ K = (D - C) \times W \times 0.6 \]

Where:

  • \( K \) is the amount of potassium needed for repletion (in mmol).
  • \( D \) is the desired potassium level (in mmol/L).
  • \( C \) is the current potassium level (in mmol/L).
  • \( W \) is the patient's weight (in kg).

To use the calculator:

  1. Understand the Formula.
  2. Gather Information: Desired potassium level (\( D \)), current potassium level (\( C \)), and patient's weight (\( W \)).
  3. Plug in Values: Substitute the values into the formula.
  4. Calculate: Perform the calculation to find the amount of potassium needed (\( K \)).
  5. Interpret the Result: The calculated value (\( K \)) represents the potassium needed for repletion.

Example:

Suppose \( D = 4 \, \text{mmol/L} \), \( C = 3 \, \text{mmol/L} \), and \( W = 70 \, \text{kg} \).

Substitute these values into the formula:

\[ K = (4 - 3) \times 70 \times 0.6 \]

Calculate:

\[ K = 1 \times 70 \times 0.6 = 42 \, \text{mmol} \]

Interpretation: The calculated value is 42 mmol, representing the potassium needed for repletion.

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