Free calculators for dog and cat parents: age, pregnancy due dates, puppy weight, portions and calories, all built on published veterinary sources.
Convert your dog's age to human years, or your age to dog years, with a size-adjusted vet chart and the 2020 epigenetic formula. Free, instant, and backed by published sources.
Convert your cat's age to human years with the standard veterinary chart, plus their official life stage.
Estimate the whelping due date and get a week-by-week pregnancy timeline from the mating date.
Estimate when the kittens are due and follow the pregnancy week by week from the mating date.
Age a kitten within about a week using weight, teeth, and eyes, with a week-by-week chart from newborn to six months.
Estimate your puppy's adult weight from their current age and weight, adjusted for breed size.
Work out your dog's daily calorie needs from weight, life stage and activity, using the standard RER and MER formulas.
Work out your cat's daily calorie needs from weight and life stage, using the standard RER and MER formulas.
How much wet or dry food to feed a cat per day, in cans and cups, from weight and life stage.
How much food to feed a dog per day, in cups and cans, from weight and life stage.
Useful articles for pet owners.

The first visible sign is often a brief appetite dip around week 3. Here is what to look for from mating to whelping, week by week.

About 4 cups of typical kibble per pound, though dense kibble runs closer to 3 and light kibble up to 5. Here is the bag math, plus the one-time trick that makes it exact.

The working rule: about a pound per month of age until six months. A 4-month-old kitten should weigh around 4 pounds. Here is the month-by-month chart and when to worry.