# Potassium replacement calculator

## 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:

- Understand the Formula.
- Gather Information: Desired potassium level (\( D \)), current potassium level (\( C \)), and patient's weight (\( W \)).
- Plug in Values: Substitute the values into the formula.
- Calculate: Perform the calculation to find the amount of potassium needed (\( K \)).
- 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.