Pet calculators
Three free tools, no sign-up or login required, for dog and cat owners. All calculations run in your browser using fixed formulas and published tables — nothing is generated by artificial intelligence and no result is a diagnosis or prescription.
Pet age in human years
Convert your dog's or cat's age using the life-stage table by species and size.
Indicative weight range
See the expected adult weight range by species, size and breed — for reference only.
Daily food (calorie estimate)
Estimate daily energy needs (RER and DER) with the open, visible formula.
Important: these calculators are educational. Your pet's clinical assessment — including body condition score, feeding plan and any treatment — is performed by a veterinarian.
Get answers about your pet on VetVirtual
Describe what you noticed and get guidance in plain language, with warning signs for when to see a veterinarian.
Get answers about your pet on VetVirtual