Age Calculator

Korean Age Calculator - Korean Age System Calculator & How to Calculate Korean Age

Free Korean age calculator & Korean age system calculator. Calculate your age in Korean age and international age. Korean age uses a unique counting system where everyone is 1 year old at birth and ages on January 1st instead of birthdays.

Last updated: October 19, 2025

Korean age calculation
International age comparison
Next age increase date

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Korean Age Calculator
Calculate your age in Korean age system and international age

Leave blank or select today for current age

Age Results

Korean Age

26

years old

International Age

25

Difference

+1

Age Comparison

26 years old (Korean age)

25 years old (International age)

Explanation

You are 1 year older in Korean age because Korean age counts age from birth (starts at 1) and everyone ages on January 1st.

Next Age Increase

January 1, 2026 (you will turn 27 in Korean age)

In Korean age, everyone gets 1 year older on January 1st (New Year's Day)

Korean Age Facts:

  • • Korean age = Current Year - Birth Year + 1
  • • Everyone is 1 year old at birth (starts counting from 1, not 0)
  • • Everyone gets 1 year older on January 1st, not on their birthday
  • • Korean age is always 1-2 years older than international age

Korean Age Calculator Types & Features

Korean Age System Calculator
Calculate age using the traditional Korean age counting system

Formula

Current Year - Birth Year + 1

Calculates age using Korean age system where everyone starts at 1

Korean Age vs International Age
Compare Korean age and international age side by side

Difference

1-2 Years Older

Shows the difference between Korean age and international age

Korean Birthday Age Calculator
Calculate Korean age from your birth date and current date

Age Calculation

From Birth Date

Calculates Korean age from any birth date and target date

Korean Age Conversion Calculator
Convert between Korean age and international age systems

Conversion

Bidirectional

Converts between Korean age and international age formats

Korean Age Formula Calculator
Understand and apply the Korean age calculation formula

Simple Formula

Year Difference + 1

Applies the standard Korean age formula for accurate calculations

Korean Age Explained Calculator
Learn how Korean age works with detailed explanations

Educational

Detailed Explanations

Provides explanations of Korean age system and calculations

Quick Example Result

For someone born on January 1, 2000 (current date: October 19, 2025):

Korean Age

26 years old

International Age

25 years old

How Our Korean Age Calculator Works

Our Korean age calculator uses the traditional Korean age counting system to determine your age. The calculation applies Korean age principles where everyone is 1 year old at birth and ages on January 1st rather than on individual birthdays.

Korean Age Calculation Formula

Korean Age = Current Year - Birth Year + 1
Everyone ages on January 1st (New Year's Day)
Korean Age starts at 1, not 0

This formula ensures accurate Korean age calculation. Unlike international age which depends on whether your birthday has passed, Korean age is simply based on the year difference plus 1. All Koreans born in the same year have the same Korean age.

📅 Korean Age System Diagram

Shows how Korean age differs from international age and when everyone ages

Understanding Korean Age System

The Korean age system has two key characteristics: 1) Everyone is considered 1 year old at birth (counting the time in the womb), and 2) Everyone ages on January 1st, creating age cohorts based on birth year rather than exact birthday. This system creates social bonds among people born in the same year.

  • Korean age starts at 1: Babies are born as 1 year old (한 살, han sal)
  • Age increases on January 1st: Everyone gets older on New Year's Day, not on birthdays
  • Same year, same age: All people born in the same calendar year have the same Korean age
  • Always 1-2 years older: Korean age is always greater than international age
  • Cultural significance: Creates age-based social hierarchy and respect in Korean culture
  • Official change: South Korea adopted international age for legal purposes in June 2023

Sources & References

  • South Korean Government - Age System Reform (2023)Official adoption of international age system for legal and administrative purposes
  • Korean Cultural Heritage Administration - Traditional Age ReckoningHistorical background and cultural significance of Korean age system
  • Korea.net - Korean Age SystemOfficial information about Korean culture and age system

Korean Age Calculator Examples

Korean Age Calculator Example
Calculate Korean age for someone born on March 15, 2000, as of October 19, 2025

Person Profile:

  • Birth Date: March 15, 2000
  • Current Date: October 19, 2025
  • Calculation: Korean Age

Calculation Steps:

  1. Birth Year: 2000
  2. Current Year: 2025
  3. Korean Age: 2025 - 2000 + 1 = 26
  4. International Age: 2025 - 2000 = 25 (birthday passed)
  5. Difference: 26 - 25 = 1 year older

Result: Korean Age = 26, International Age = 25, Difference = 1 year

Next age increase: January 1, 2026 (will turn 27 in Korean age)

Born Early in Year

Born: January 5, 2000

Korean Age: 26, International Age: 25 (1 year difference)

Born Late in Year

Born: December 31, 2000

Korean Age: 26, International Age: 24 (2 years difference until birthday)

Frequently Asked Questions

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