Veterinary Drug Dose By Weight Calculator

Work out veterinary drug dose by weight instantly with clear inputs, formula shown and shareable results.

About Veterinary Drug Dose By Weight Calculator

Multiplies animal weight by the mg/kg dose and converts to a volume using the preparation strength.

Formula

Veterinary dose

Dose (mg) = weight (kg) x mg/kg; volume (mL) = dose / concentration (mg/mL)

Worked example

With the default values below, Veterinary Drug Dose By Weight Calculator returns Dose per administration of 110.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Animal weightaccepts 0.1–1,000 kg: 22 kg
Doseaccepts 0.01–200 mg/kg: 5 mg/kg
Preparation strengthaccepts 0.1–500 mg/mL: 50 mg/mL
Doses per dayaccepts 1–4: 2

Results

Dose per administration: 110.00 mg
Volume per dose: 2.200 mL
Daily dose: 220.00 mg
Daily volume: 4.400 mL

Step by step

1Values used
2Veterinary dose
3Dose per administration= 110.00 mg
4Volume per dose= 2.200 mL
5Daily dose= 220.00 mg
6Daily volume= 4.400 mL

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Do all species use mg/kg?

Most do, but some drugs are dosed by body surface area, and cats differ markedly from dogs in metabolism.

Which drugs are dangerous in cats?

Paracetamol, permethrin and many NSAIDs are toxic to cats at doses tolerated by dogs.