Age & Date Calculator
Enter your date of birth to calculate your exact age, total days lived, next birthday countdown, zodiac sign, and more.
What You Get
Exact Age
Precise years, months, and days — not just a rough number.
Time Alive
Total days, weeks, hours, and estimated heartbeats since birth.
Zodiac Sign
Automatically detected Western zodiac sign with emoji.
Birthday Countdown
Days until your next birthday, recalculated live.
How the Age Calculator Works
SimpleSwap's age calculator uses your date of birth and the current date (or a custom date) to compute your exact age in years, months, and days. The calculation accounts for varying month lengths and leap years to give you a precise result.
Understanding Total Days Lived
The "Total Days" metric shows the exact number of days between your birth date and the target date. This is calculated directly using date arithmetic, not by multiplying years by 365. Leap years are fully accounted for, so the number is exact.
How Zodiac Signs Are Determined
Your Western zodiac sign is determined by your birth month and day using the traditional date ranges. For example, Aries covers March 21 – April 19, Taurus covers April 20 – May 20, and so on through all twelve signs. The calculator automatically identifies your sign and displays the corresponding symbol.
Estimated Heartbeats
The average resting heart rate for adults is approximately 72 beats per minute. We multiply your total days lived by 24 hours × 60 minutes × 72 beats to estimate total heartbeats. This is an approximation — actual heartbeats vary with activity, age, and health.
Privacy & Security
All calculations are performed in your browser using JavaScript. Your birth date is never sent to any server. We don't store, log, or transmit any personal information. See our Privacy Policy for details.