Potassium supplementation calculator

Calculate KCl supplementation for an IV fluid bag and verify the resulting potassium delivery rate.

Patient details

Enter patient weight and current serum potassium. VetTK applies the referenced potassium supplementation table automatically.

Patient weight

Serum potassium

mmol/L

Fluid bag & potassium product

Fluid bag volume

Base fluidPotassium already in base fluid

mmol/L

KCl stock concentration

mmol/mL

Default 2.6 mmol/mL corresponds to the 20% KCl formulation shown in BSAVA. Verify the product label.

Infusion rate

Fluid administration rate

mL/h

Calculation result

Enter serum potassium, bag volume and KCl stock concentration to calculate the preparation.

Potassium safety

• Never administer concentrated KCl as a rapid IV injection or bolus.
• Dilute and mix the bag thoroughly before administration.
• Use an infusion pump; monitor serum potassium and the patient closely.
• Use particular caution with impaired renal potassium excretion.

Clinical notes

Serum potassium may not immediately reflect total-body potassium deficit. Recheck potassium and adjust supplementation according to patient response, renal function and clinical judgement.

Clinical references & traceability

Review the sources behind the guided potassium bands, maximum delivery rate and KCl safety warnings used by this calculator.

For veterinary professional use only. Calculation support does not replace clinical judgement or product-specific instructions.