What is Korean age and how do I calculate it?
Let's say a baby was born a week ago. In the U.S., people would say the baby is one week old. In Korea, the baby would be considered "one year old." Why? Because in Korean age, you always start with "one year" from the day you were born.
Let's try another example. Let's say you were born on July 1st, 1995. Today is January 23, 2015. That would mean you are 19 years old because you have not had your birthday yet this year. Simply add 1 to that number (1 + 19) and you will know how old you are in Korean age.
Also, remember that many Koreans consider people to be one year older on the first day of the year. So on January 1st, you are one year older for the rest of that year regardless of your birthday.