Next birthday
——More than a birthday calculator
Calculate your exact age instantly.
Find your age in years, months, weeks, days, hours and seconds. Discover your next birthday, world calendar dates, Chinese zodiac and fascinating lifetime statistics.
Exact ageWorld calendarsLifetime statistics
Start here
Enter your birth date
Your birth date stays in your browser and is never uploaded.
Your personalised results
Your life in numbers
Here is your age calculated from your selected birth date.
0Years
0Months
0Days
Born on
——Earth journeys
—Completed journeys around the SunMoon cycles
—Approximately completedWorld calendars
Your birth date around the world
The same day represented through different calendar traditions.
Islamic calendar
Hijri birth date
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Current Hijri date—
Persian calendar
Solar Hijri birth date
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Current Persian date—
Chinese zodiac
Your zodiac sign
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Lifetime statistics
How long have you lived?
Total months0
Total weeks0
Total days0
Total hours0
Total minutes0
Total seconds0
Fun estimates
Your lifetime journey
These values are interesting general estimates, not medical measurements.
Estimated heartbeats0
Estimated breaths0
Estimated hours asleep0
Birthdays completed0
During your lifetime
Technology milestones
A selection of widely known developments that happened after your birth.
Simple, private and precise
What does this age calculator show?
The calculator compares your selected birth date with the current date and displays your completed years, remaining months and days.
It also converts your birth date into Islamic Hijri and Persian calendar formats, estimates your Chinese zodiac, and calculates how many weeks, days, hours, minutes and seconds you have lived.
Everything is calculated inside your browser. Your date is not uploaded to a server or stored in an online account.
Frequently asked questions
Age calculator questions
How is my exact age calculated?
Your exact age is calculated by comparing your birth year, month and day with the current local date on your device.
Is my birth date saved?
No. The calculation happens locally in your browser and your selected birth date is not uploaded by this website.
Are the heartbeat and sleep totals exact?
No. These are general estimates designed for entertainment. Real values vary between individuals and throughout life.
Why can calendar dates vary between sources?
Calendar conversions can vary slightly depending on the regional method, observation rules and calendar system used.