This is equivalent to a human's lifespan of 97 to 100 years. A cat's average lifespan is 15 to 16 years, roughly equivalent to a human's 70 years. A cat's typical lifespan is 18-20 years, and cats' ages are categorized as follows:
1. Kitten: One month is equivalent to 6 months in human years, three months is equivalent to 4 years in human years, and six months is equivalent to 10 years in human years.
2. Adult cat: One year old is equivalent to 18 years old in human years, two years old is equivalent to 24 years old in human years, and four years old is equivalent to 35 years old in human years.
3. Mature cats: Six years old is equivalent to 42 years old in human years, 8 years old is equivalent to 49 years old in human years, and 10 years old is equivalent to 57 years old in human years.
4. Older cats: 11 years old is equivalent to 64 years old in human years, 12 years old is equivalent to 65 years old in human years, and 14 years old is equivalent to 73 years old in human years.
5. Old Cat: 15 years old is equivalent to 77 years old in human years, 18 years old is equivalent to 89 years old in human years, and 20 years old is equivalent to 97 years old in human years. 
How to care for an older cat
While humans are in their adolescence at 18, cats are already considered elderly at 18, whereas their adolescence typically lasts between 1 and 2 years old. A 10-year-old cat can generally be considered to have entered old age. After this point, owners need to provide extra meticulous care to ensure the cat's longevity.
