Three age systems
Traditional Korean age starts at 1 and increases on January 1. Year age starts at 0 and increases on January 1. International age starts at 0 and increases on birthdays.
Cultural age
Korean Age Calculator
Compare international age, traditional Korean age, and year age.
Official context
South Korea officially moved to the international age system on June 28, 2023, but traditional Korean age is still searched and used informally.
Sources
Browse Cultural Age Calculators
Cultural Age Calculators overview
Compare international age with traditional cultural age systems such as Chinese lunar age and Korean age.
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Calculate Korean age
Compare international, traditional Korean, and year age.