How much should an adult Russian Blue weigh?

A healthy adult male Russian Blue typically weighs 3.0–5.5 kg (6.6–12.1 lb), and a female 2.2–4.3 kg (4.9–9.5 lb). Body shape matters as much as the number: you should be able to feel the ribs easily without seeing them.

How much should a 6-month-old Russian Blue weigh?

Around 2.7 kg for a male (healthy range 2.1–3.3 kg) and 2.1 kg for a female (1.6–2.5 kg).

When is a Russian Blue fully grown?

Most reach their adult height within the first year and fill out into their adult weight over the following months. The chart above shows the typical path from 2 to 12 months.

My Russian Blue is outside the range. Should I worry?

Not necessarily. Ranges describe most healthy cats of the breed, and some sit naturally above or below. Check their body shape, and ask your vet if the weight is changing quickly or you are unsure.

Russian Blue weight chart

Name: Russian Blue healthy weight ranges
Creator: PetTrackr

How much should a Russian Blue weigh? Healthy ranges for adult males and females, and the typical growth path of a kitten, month by month.

Adult male3.0–5.5 kg6.6–12.1 lb

Adult female2.2–4.3 kg4.9–9.5 lb

Russian Blue kitten growth chart

Male Female Line: average. Shading: healthy range.

Weight by month

Age	Male	Female
2 months	1.4 kg 1.0–1.9 kg	1.1 kg 0.8–1.4 kg
3 months	1.8 kg 1.3–2.3 kg	1.4 kg 1.1–1.8 kg
4 months	2.1 kg 1.6–2.7 kg	1.7 kg 1.3–2.1 kg
5 months	2.5 kg 1.9–3.0 kg	1.9 kg 1.5–2.4 kg
6 months	2.7 kg 2.1–3.3 kg	2.1 kg 1.6–2.5 kg
7 months	2.9 kg 2.3–3.5 kg	2.3 kg 1.8–2.7 kg
8 months	3.0 kg 2.4–3.6 kg	2.4 kg 1.9–2.8 kg
9 months	3.2 kg 2.5–3.8 kg	2.5 kg 1.9–2.9 kg
10 months	3.3 kg 2.5–4.0 kg	2.6 kg 2.0–3.1 kg
11 months	3.4 kg 2.5–4.3 kg	2.7 kg 2.0–3.4 kg
12 months	3.5 kg 2.5–4.5 kg	2.8 kg 2.0–3.6 kg

Weight by life stage

Stage	Male	Female
1 to 3 years	2.5–4.5 kg	2.0–3.6 kg
3 to 8 years	3.0–5.5 kg	2.2–4.3 kg
8 years and older	2.9–5.3 kg	2.1–4.1 kg

Reading the numbers

Each range covers most healthy Russian Blues of that age and sex, roughly the middle 80%. It is a guide, not a target: build varies, and a cat slightly outside the range can be perfectly healthy.

Ranges are drafted from breed standards and veterinary references and checked against published figures. Month-by-month curves are interpolated along the usual growth shape for the breed’s size.

PetTrackr helps you keep track. It is not veterinary advice: if your pet seems unwell, call your vet.

Track your Russian Blue’s weight in PetTrackr

Every weigh-in is placed on this range for your cat’s exact age and sex, with a gentle plan if they drift.