Rat years to human years

rat years to human years

Do you want to convert rat years to human years? Estimations show that each adult rat year equals 30 human years. For example:

  • 1 year old rat is 30 years old in human years
  • 3 years old rat is 90 years old in human years

But for rat pups, their human age is calculated differently. Due to a short lifespan, young rats develop very quickly compared to human kids. So if you think that a 6-month rat is 15 in human years, your calculations are incorrect.

Rat to human years calculator

Convert rat years to human years using our online rat age converter:




Rat age chart


rat years to human years chart

How do rats age?

Rats live through 4 main life stages:

  1. From birth to 1 month – baby
  2. From 1 month to 6 months – adolescence
  3. From 6 months to 2 years – adult
  4. From 2 years and older – senior

The oldest rat

The oldest rat recorded by the Guinness World Records was Rodney, who died at the age of 7 years (which equals 210 human years!)