Reckon what your pet actually needs
Free calculators for dogs, cats, fish and small pets: age, food portions, tank volume and stocking. Save a pet once and every tool pre-fills.
The calculators
Dogs
Your dog's age in human years, breed-size adjusted, not the Γ7 myth.
Cats
Your cat's age in human years using the real feline curve, not the Γ7 myth.
Dogs
How much to feed: daily calories and cups by weight, activity and life stage.
Fish & Aquarium
Tank gallons and liters from your dimensions: rectangle, cylinder, hex and more.
Fish & Aquarium
Bioload-based stocking guidance, not the oversimplified 1-inch-per-gallon rule.
The rules everyone repeats (and why they are wrong)
Both of these shortcuts are still quoted everywhere. Here is what the numbers actually do, and the method each calculator runs instead.
Myth-buster
The "multiply by 7" rule is a myth. Here is how dogs really age by size, and the breed-size-adjusted method vets use instead.
Myth-buster
Why the one-inch-per-gallon rule fails, and how bioload weighting, adult size, minimum tank size and group size really decide how many fish a tank holds.
One saved pet, every tool
Add your pet in and their breed, weight and birthdate pre-fill the age, food and growth calculators, with no re-typing. Saved on your device only.