Cat Medication Dosage Calculator

Calculate the correct medication dose for your cat using its weight and the prescribed concentration. Always confirm with your veterinarian before administering any treatment.

Dosage Inputs

Enter the cat's weight and the medication concentration published in your veterinarian's instructions.

How to Use This Calculator

Start with your cat's weight (in kilograms) and the medication concentration (mg per kg) prescribed by your veterinarian. Use a digital scale and double-check the units to keep the recommendation accurate.

Methodology

The calculator multiplies the cat's weight by the concentration to match the standard veterinary dosage formula. Inputs are validated so the UI never renders NaN or Infinity, and every result is rounded with a deterministic two-decimal strategy.

These figures are educational estimates; always consult your veterinarian before giving any medication.

Step-by-step example: A 4.2 kg cat with a 5 mg/kg concentration receives 4.2 × 5 = 21.00 mg.

The calculator uses that basic arithmetic and the same rounding rules as the legacy experience.

Glossary of Terms

  • Weight (kg): Your cat's mass in kilograms.
  • Concentration (mg/kg): Medication milligrams per kilogram of cat weight.
  • Recommended Dosage (mg): Calculated dose based on the two values above.

Frequently Asked Questions

How do I determine the weight of my cat?

Use a digital scale, or weigh yourself holding your cat and subtract your own weight for the most accurate measurement.

What if my cat's weight is in pounds?

Convert pounds to kilograms by dividing by 2.20462 before entering the value.

Can I use this calculator for all medications?

This tool follows a general veterinary guideline, but individual medications or conditions may require adjustments. Always follow the directions given by your veterinarian.

What should I do in case of an overdose?

If you suspect an overdose, contact your veterinarian or an emergency animal clinic immediately.

Why is my calculated dosage different from the vet's?

Your veterinarian may account for other factors or use a different safety margin. Always follow their instructions above the estimate shown here.

Formulas

Dosage (mg): Dosage = Weight (kg) × Concentration (mg/kg)

  • Weight (kg): The cat's measured weight.
  • Concentration (mg/kg): Medication strength per kilogram.
  • Recommended Dosage (mg): The calculated milligram dose.
Citations

CDC — Health topics · Accessed 2026-01-19
https://www.cdc.gov/

NIH — Health information · Accessed 2026-01-19
https://www.nih.gov/health-information

WHO — Health topics · Accessed 2026-01-19
https://www.who.int/health-topics

Changelog
  • 0.1.0-draft — Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido Last Updated: 2026-01-19 Version 0.1.0-draft
Version 1.5.0