Age, date, and life calculators
Calculate age, dates, and life milestones.
Find exact age, compare dates, count down to birthdays, check zodiac and birthstone traditions, and explore personal time statistics.
Quick calculation
Calculate how long you have lived
Enter your birth date to see your age in years, months, days, hours, and seconds. Open the full calculator for live body estimates, dated milestones, and global changes since your birth.
- Exact age and calendar totals
- Live estimates that update every second
- No account and no uploaded birth date
Enter your birth date, then select Show my life stats.
Popular tools
Open the six calculators most often used for age, dates, birthdays, and milestones.
Age Calculator
Calculate your exact age in years, months, and days, plus total weeks, hours, seconds, next birthday, leap days, and age milestones.
Days Calculator
Count days between two dates, include or exclude endpoints, add or subtract days, and calculate business-day offsets with optional U.S. holidays.
Birthday Countdown
Calculate how many days until your next birthday, the age you will turn, birthday-year progress, and your next five birthday dates with weekdays.
Life Calendar in Weeks
Create a private life calendar from your birth date. See exact age, days and weeks lived, current life week, estimated weeks remaining, and progress.
Life Milestones Calculator
Find when you reach 1,000, 10,000, or 25,000 days old, 1,000 weeks, 500 months, and one or two billion seconds, with a timeline.
What's My Zodiac Sign?
Use this free zodiac sign calculator to find your Western sun sign by birthday. See zodiac dates, symbol, element, modality, ruler, and cusp notes.
Calculation guides
Learn how calendar rules, date boundaries, and estimates affect each result.
How to Calculate Age
Learn how to calculate exact age from a date of birth in years, months, and days, with leap-year rules, date examples, total days, and common mistakes.
Days Between Dates Explained
Learn how to count days between two dates, including elapsed and inclusive days, endpoints, business days, leap years, and timezone pitfalls.
How to Read a Life Calendar in Weeks
Learn how a life calendar in weeks works, calculate weeks lived, choose a planning horizon, read the grid, and use it without treating it as a prediction.