Enter the desired potassium level, current potassium level, and the patient’s weight into the calculator to determine the amount of potassium needed for repletion. This calculator can also evaluate any of the variables given the others are known.

## Potassium Repletion Formula

The following formula is used to calculate the amount of potassium needed for repletion.

K = (D - C) * W * 0.6

Variables:

- K is the amount of potassium needed for repletion (mmol) D is the desired potassium level (mmol/L) C is the current potassium level (mmol/L) W is the patient’s weight (kg)

To calculate the amount of potassium needed for repletion, subtract the current potassium level from the desired potassium level. Multiply the result by the patient’s weight and then by 0.6. The result is the amount of potassium needed for repletion in millimoles.

## What is a Potassium Repletion?

Potassium repletion is a medical treatment process that involves the restoration of normal potassium levels in the body. Potassium is a vital mineral and electrolyte that plays a crucial role in various bodily functions such as nerve and muscle cell functioning, heart function, and maintaining fluid balance. When the body’s potassium levels are low, a condition known as hypokalemia, it can lead to serious health issues. Therefore, potassium repletion, often through oral or intravenous supplementation, is necessary to correct this imbalance.

## How to Calculate Potassium Repletion?

The following steps outline how to calculate Potassium Repletion using the formula: K = (D – C) * W * 0.6

- First, determine the desired potassium level (D) in mmol/L.
- Next, determine the current potassium level (C) in mmol/L.
- Next, determine the patient’s weight (W) in kg.
- Multiply the difference between the desired and current potassium levels (D – C) by the patient’s weight (W).
- Multiply the result from step 4 by 0.6.
- Finally, calculate the amount of potassium needed for repletion (K) in mmol.

**Example Problem:**

Use the following variables as an example problem to test your knowledge.

Desired potassium level (D) = 4 mmol/L

Current potassium level (C) = 3 mmol/L

Patient’s weight (W) = 70 kg