Animal Weight

How much does a Brown rat weight?

It is hard to guess what a Brown rat weights. But we have the answer:

An adult Brown rat (Rattus norvegicus) on average weights 282 grams (0.62 lbs).

The Brown rat is from the family Muridae (genus: Rattus). It is usually born with about 5 grams (0.01 lbs). When reaching adult age, they grow up to 18.2 cm (0′ 8″). On average, Brown rats can have babies 3 times per year with a litter size of 8.

As a reference: An average human weights in at 62 kg (137 lbs) and reaches an average size of 1.65m (5′ 5″). Humans spend 280 days (40 weeks) in the womb of their mother and reach around 75 years of age.

The average adult weight of a Brown rat is 282 grams (0.62 lbs)

The brown rat (Rattus norvegicus), also known as the common rat, street rat, sewer rat, Hanover rat, Norway rat, Norwegian rat, Parisian rat, or wharf rat is one of the best known and most common rats.One of the largest muroids, it is a brown or grey rodent with a head and body length of up to 28 cm (11 in) long, and a tail slightly shorter than that. It weighs between 140 and 500 g (5 and 17 3⁄4 oz). Thought to have originated in northern China, this rodent has now spread to all continents except Antarctica, and is the dominant rat in Europe and much of North America, making it, by at least this particular definition, the most successful mammal on the planet alongside humans. With rare exceptions, the brown rat lives wherever humans live, particularly in urban areas.Selective breeding of the brown rat has produced the fancy rat as a pet, as well as the laboratory rat – rats used as model organisms in biological research.

Animals of the same family as a Brown rat

We found other animals of the Muridae family:

Animals with the same weight as a Brown rat

As a comparison, here are some other animals that weight as much as the Rattus norvegicus:

Animals with the same litter size as a Brown rat

Here is a list of animals that have the same number of babies per litter (8) as a Brown rat: