What is Age Calculator?

The Age Calculator is a free online tool that automatically calculates accurate age based on a specific reference date when you input a birthdate. It can calculate age in various forms including full age, years, months, and days, providing accurate age information needed in real life such as legal document preparation, school/job applications, insurance enrollment, and pension calculations. You can instantly check results with just a few clicks without complex calculations, and it's supported on both mobile and desktop.

How to Use

1. Select the birthdate of the person whose age you want to calculate in the birthdate input field.
2. Select the reference date for age calculation in the reference date input field. (Default: today)
3. The calculated age is automatically displayed in 'years, months, days' format.
4. The result is based on full age and can be referenced when preparing legal documents.

Use Cases

• •Check accurate full age when writing job applications or resumes
• •Verify age criteria for insurance enrollment and reference premium calculations
• •Check school admission eligibility (age as of admission date)
• •Verify military service obligation eligibility (as of specific date)
• •Calculate pension eligibility age
• •Check if legal adult age has been reached

Notes

This calculator is based on full age. Full age changes depending on whether the birthday has passed, so enter the birthdate accurately for precise calculation. In South Korea, the Full Age Unification Act has been enforced since June 28, 2023, and full age is used in all laws and official documents. However, traditional customs (Lunar New Year, first birthday celebrations, etc.) may still use Korean age, so use appropriately for your purpose.