About This Site
Gus got fat.
That's how this started. My golden retriever hit 85 pounds. The vet raised an eyebrow and said something about "golden receivers." I went home, made a spreadsheet, and built a calorie calculator that night. It was ugly. It worked.
Then friends at the dog park wanted it. Then strangers on Reddit. Then a cat owner asked for a feline version. Mochi — my British Shorthair who came from a hoarding situation — was 15 pounds at the time and the vet had just called her "obese." So I built that one too.
One tool became five. Spreadsheets became a website. PetCalCentral is what happened when I stopped googling "best dog food" at midnight and started building the thing I actually needed.
What This Site Is
A collection of free pet health calculators. Dog calories. Cat portions. Age conversion. BMI estimates. Water intake. All based on published veterinary research — APOP guidelines, AAHA recommendations. No accounts. No paywalls. No "sign up for our newsletter."
What This Site Is Not
Veterinary advice. I'm not a vet. I'm an IT guy in Denver who got a puppy on impulse in 2022 and spent two years googling things at 2 AM. If your pet is sick, call a professional. If you want a starting point for a conversation with that professional, use our tools.
Some links on this site are affiliate links. If you buy something through them, I may earn a small commission at no extra cost to you. I only recommend products I've actually used on Gus or Mochi. Read the full disclosure if you want the details.
The Animals
Gus — Golden retriever, 4 years old. Weighed 85 pounds, now 78. Goal weight 75. His greatest predator is the vacuum cleaner. He once ate a crayon. He's currently dreaming about tater tots he stole off someone's plate at a brewery in RiNo.
Mochi — British Shorthair, adopted June 2024 from a hoarding situation. Was 15.2 pounds when Dr. Patel called her obese. Now around 10.2 after a year of measured meals and a $7 wand toy from Chewy. She knocks things off my desk when I write. She's on the desk right now.
— I live in Denver with both of them. Gus is chewing something. I should go check.