年齡計算器
計算你精確的年齡(年、月、日)以及下個生日倒數。
Your age
Total days lived
Total months
Days until birthday
More details
- Day of week born
- Next birthday
- Zodiac sign
How to use
- Enter your date of birth using the date picker.
- Optionally set a reference date — leave blank to default to today.
- Results appear instantly: age in years/months/days, total days lived, birthday countdown, day of week, and zodiac sign.
Related calculators
- Date Difference Calculator — count days between any two dates
- BMI Calculator — calculate Body Mass Index
- TDEE Calculator — find daily calorie needs by age and activity
More age tools
- How Old Am I? — instant answer with zodiac and day-of-week details
- Exact Age Calculator — age to the day for any two dates
常見問題
- Is this age calculator free?
- Yes, completely free with no account required. All calculations run in your browser.
- Does my date of birth leave my device?
- No. Everything runs client-side in JavaScript. Your birth date is never sent to any server.
- Does it work on mobile?
- Yes. The tool is mobile-first and works in Safari and Chrome on iOS and Android.
- How is the exact age calculated?
- The calculator subtracts the birth date from the reference date accounting for variable month lengths and leap years, giving years, months, and remaining days. Total days is computed from the millisecond difference between the two dates.
Last updated: By jarvisbox