Growth calculator: how big will the young animal grow

Give the age, sex and at least one measurement of a young animal: the calculator builds the growth curve of the species or breed and shows the range of adult sizes.

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How big will a domestic cat kitten grow? Size forecast by age, calculator

How it works

We know how animals grow: for every species and many breeds we know the average weight and size of a young animal at different ages, from birth to adulthood. Give the age, sex and at least one measurement of the youngster (weight, length, height at the withers or length with the tail) and we will show how big it will most likely grow. This is a range, not an exact number: growth depends on nutrition, health and heredity. The more measurements, the narrower the range.

For now we calculate only for mammals with the necessary data: at present cats and dogs, including many breeds.

An extended version is coming soon. It will take measurements at several ages at once, pull the weight and height from the pet diary and refine the forecast by the sizes of the parents and grandparents.

Up to what age does the growth calculator work?

Up to the age when the animal stops growing: after that the size hardly changes. For cats, for example, this is about 9 months.

For which animals can we predict adult sizes?

For now only for mammals with data on mass and size at different ages: cats and dogs, including many breeds.

Which measurements do I need to enter?

One is enough: mass, body length or height. The more measurements, the better the forecast; for some breeds the tail length and other sizes are available.

How accurate is the forecast?

It is a range, not one number: it depends on the breed, sex and individual traits, so treat the result as a guide.