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Age Calculator

Calculate age in years, months, and days, discover the weekday you were born, and see a countdown to your next birthday. Dates stay in your browser.

TODO-i18n: this tool's instructions and FAQs are currently available in English.

ツール操作エリア

アカウント不要

Calculations run locally in your browser. No account or server-side calculation is needed.

Date of birthCalculate age on (optional)

Enter a birth date to calculate your age.

Age Calculatorとは

Calculate age in years, months, and days, discover the weekday you were born, and see a countdown to your next birthday. Dates stay in your browser.

使い方

Calculate age in years, months, and days, discover the weekday you were born, and see a countdown to your next birthday. Dates stay in your browser.

よくある用途

Calculate age in years, months, and days, discover the weekday you were born, and see a countdown to your next birthday. Dates stay in your browser.

利用上の注意

Calculate age in years, months, and days, discover the weekday you were born, and see a countdown to your next birthday. Dates stay in your browser.

よくある質問

Age Calculatorとは: Calculate age in years, months, and days, discover the weekday you were born, and see a countdown to your next birthday. Dates stay in your browser.