About Dogu Korea Tools

Dogu (도구, "tool" in Korean) is a small collection of free calculators for things that work differently in Korea, such as how age is counted.

How we work

Rules first: every tool explains how it calculates, and links to official or published sources.
Private: calculations run in your browser. We do not receive what you type.
Honest about limits: rules in Korea can change. Results are for reference, and important decisions should be checked against the official source.

Tools and explanations are written with the help of AI tools and checked against their sources and test values before publishing.

Found a mistake or want a tool? Email rkim27005@gmail.com. Please include the tool, the values you entered and the result you expected.