What This Calculator Does
The Dog Insulin Dosage Calculator gives a quick estimate of how much insulin a diabetic dog may need based on body weight. Most veterinarians begin canine diabetics on roughly 0.25 to 0.5 units of insulin per kilogram of body weight per day, usually split into two injections about 12 hours apart. This tool multiplies a chosen dose-per-kg by the dog's weight to show the estimated daily total and the per-injection amount.
How to Use It
Enter your dog's weight in kilograms and the dose per kilogram your veterinarian recommends (0.5 U/kg is a common conservative-to-moderate starting figure). The calculator returns the total daily units, the amount per twice-daily injection, and the low and high ends of the standard starting range so you can sanity-check a prescription.
The Formula Explained
The core equation is simply $$\text{Total Daily Dose} = \text{Dose (U/kg)} \times \text{Weight (kg)}$$ For twice-daily (BID) dosing the daily total is divided by two: $$\text{Per Injection} = \dfrac{\text{Total Daily}}{2}$$ For example, a 10 kg dog at 0.5 U/kg needs 5 units per day, or 2.5 units per injection. The same dog at the 0.25 U/kg low end would need only 2.5 units per day.
Worked Example
A 20 kg Labrador starting at 0.5 U/kg: \(0.5 \times 20 = 10\) units per day, given as 5 units twice daily. The starting-range guideposts would be 5 U/day (low) to 10 U/day (high).
FAQ
Is this a substitute for veterinary advice? No. Insulin is a high-risk drug and overdose can be fatal. This is an educational estimate only — actual dosing must be set and adjusted by your veterinarian using blood glucose curves.
Why twice daily? Most intermediate-acting veterinary insulins (such as Vetsulin/Caninsulin) don't last a full 24 hours in dogs, so the daily dose is typically split into two injections.
What if my dog's weight is in pounds? Divide pounds by 2.205 to get kilograms before entering the value (e.g. \(44\text{ lb} \div 2.205 \approx 20\text{ kg}\)).
