About PetCalcKit

PetCalcKit is a set of free calculators for dog and cat owners. Each tool answers one practical question, such as how big a puppy will get or whether something a dog ate is dangerous, and shows the answer in seconds on any phone.

How we build our calculators

• Every calculator is based on veterinary references or published research, and each page explains its method and names its sources.
• Health-related tools use conservative values, so results lean toward caution.
• We review each calculator when its sources are updated and show the last review date on the page.

What our calculators are not

Our results are estimates. They help you decide what to do next, but they are not a diagnosis and they don't replace a veterinarian who can examine your pet. Read our veterinary disclaimer for details.

Get in touch

Found a mistake or have an idea for a calculator? Contact us.