Useful Tools for Dog Owners
Free calculators and resources to help you better understand and care for your furry friend
How these tools work: the medication and poisoning calculators use dose and toxicity thresholds from published veterinary references, named at the bottom of each page. They give general guidance for a typical healthy dog and are not a substitute for your vet, who knows your dog’s health and any other medicines they take.
Poisoning and emergencies
Check how serious it is if your dog has eaten chocolate, grapes or raisins, or something containing xylitol, based on their weight and how much they ate.
If your dog has already eaten something toxic, call your vet or an out-of-hours emergency vet now. Use these calculators while you wait, not instead.
Chocolate Toxicity Calculator
Instantly assess whether your dog is at risk after eating chocolate. Covers white chocolate to cocoa powder, with a chart of how much is dangerous by weight.
Xylitol Toxicity Calculator
Find out if your dog is in danger after eating sugar-free gum, sweets, or peanut butter. Maps common products to estimated xylitol doses for instant risk assessment.
Grape & Raisin Toxicity Calculator
Check what your dog has eaten against the vet treatment threshold for grapes, raisins, sultanas and currants, including mince pies, hot cross buns and Christmas pudding.
Medication dosing
Work out doses of common human medicines that vets sometimes recommend for dogs. Never give either without checking with your vet first.
Dog Paracetamol Calculator
Check the paracetamol dose for your dog by weight, with the safety limits that matter and what to do if your dog has eaten paracetamol by accident. Always check with your vet first.
Dog Piriton Dosage Calculator
Work out the Piriton (chlorphenamine) dose for your dog by weight, in mg, 4mg tablets or syrup, with a dose chart and the 8 mg maximum per dose.
Everyday care
Understand your dog’s life stage and how much they should be drinking each day.
Dog Age Calculator
Convert your dog's age to human years by size or breed, with a full dog years chart and a human years to dog years converter. More accurate than the outdated 7-year rule.
Dog Water Intake Calculator
Work out how much water your dog needs each day by weight, activity and weather, in ml and pints, and check whether they are drinking too much.
Suggest a Tool
We're always working on more helpful tools for dog owners. Have an idea for a calculator or resource that would help?Let us know!
These tools provide general guidance and should not replace professional veterinary advice. Always consult your vet for health-related decisions.