Printable kitten weight chart

What’s inside

• Page 1 for a male kitten, page 2 for a female: weeks 8 to 78 along the bottom, kilograms up the side, a line every week and every 0.25 kg.
• On each sheet, the 9th to 91st centile band and the median from our fit of the open Waltham data, the same lines as on our kitten weight chart page.
• US Letter adds a pound scale on the right; A4 is in kilograms only.
• Page 3: a log of weigh-ins with the date, the age in weeks, the weight and whether it fell below, in or above the band.
• Fields for the kitten’s name, date of birth and the scale you use.

Where the band comes from

The band and the median are our own fit of the data that WALTHAM researchers published with their kitten growth standard (Salt and colleagues, PLOS ONE, 2022): healthy, intact domestic shorthair kittens weighed at clinics in the USA and at the WALTHAM research colony, shared under CC BY 3.0. It is not the official WALTHAM chart, which WALTHAM offers on its own site with more centile lines. Our female median after about a year sits a little below the article’s figure, because it follows the data.

The band holds the middle 82 of every 100 kittens in the data at each age. It describes those kittens, not what your kitten should weigh.

• Kitten weight chart by week and month
• Kitten weight calculator
• The official WALTHAM kitten growth charts (opens in a new tab)

Which kittens it fits

• Ages 8 to 78 weeks: the data had too few weighings of younger kittens.
• Domestic shorthair kittens with an adult weight of roughly 2 to 7 kg. Larger breeds such as Maine Coons may grow differently.
• Intact kittens: after neutering, weight often rises faster. Write the date of the surgery in the log.

How to weigh and read it

WALTHAM suggests weighing every 2 to 4 weeks until 6 months, then every 1 to 3 months until your cat is fully grown, and not more often, since a meal or the litter box can move the number. A kitchen scale works for a small kitten; later, weigh yourself holding the cat and subtract your own weight.

Look at the line of dots, not one dot. If a weight falls outside the band, check the number, weigh again on the same scale and ask your vet, who will also look at body condition with a chart such as WSAVA’s. WALTHAM advises seeing the vet if a kitten crosses two or more centile lines or is unwell for a long time.

• New kitten checklist