Dog Onion Toxicity Calculator
Screen onion-ingestion risk for a dog. Not a substitute for a vet.
⚠️ Onions (and garlic, leeks, chives) damage a dog's red blood cells. If ingestion occurred, contact your vet — this only screens the dose.
How the Math Works
The Dog Onion Toxicity Calculator uses a straightforward formula to estimate risk: dose = onion(g) ÷ weight(kg). This calculates the concentration of onion ingested per kilogram of the dog's body weight. If this dose is approximately 5 grams per kilogram or higher, it is considered potentially toxic. The formula assumes linear toxicity risk based on body weight, though individual sensitivity may vary. Note that this is a simplified model and not a definitive medical assessment.
Practical Applications
To use the calculator, input the amount of onion consumed in grams and your dog’s weight in kilograms. The tool divides the onion weight by the dog’s weight to determine the dose. If the result meets or exceeds 5 g/kg, the risk is considered high. Always consult a veterinarian immediately if toxicity is suspected, even if the calculated dose is below the threshold, as symptoms may still require professional intervention.
Day-to-Day Use
This calculator helps quickly assess onion ingestion risks in everyday situations, such as a dog accessing food scraps or treats. By providing immediate feedback on potential toxicity levels, it encourages proactive care and timely vet visits. It also educates pet owners about the dangers of onions, fostering safer environments for dogs and preventing serious health issues before they escalate.
Worked example
15 kg dog, 30 g onion → 2 g/kg (monitor; still call a vet).
FAQ
Garlic too?
Yes — garlic is even more concentrated than onion.