Age Calculator
🎂 Age Calculator
Calculate Your Exact Age in Years, Months, Days & More
📖 How to Use the Age Calculator — Complete Guide
🎂 How to Calculate Your Age
- Enter your Date of Birth using the date picker.
- Optionally, set a different Age at Date (defaults to today).
- Your exact age appears instantly in the dark display box.
- Check the detailed cards for total months, weeks, days, hours, minutes, and seconds.
- If the reference date is today, the Next Birthday countdown will also be shown.
- Click Copy Age to copy the age string, or Download to save the details as a text file.
📊 How Age Is Calculated
The tool uses your local timezone and accounts for leap years. It first computes the difference in calendar years, months, and days, then adjusts if the current day of month is before the birth day. Total hours, minutes, and seconds are derived from the total number of milliseconds between the two dates.
Exact Age Breakdown
Years, months, days, and more.
Next Birthday Countdown
See how many days until your next celebration.
Flexible Reference Date
Calculate age at any date, past or future.
Copy & Download
Copy the result or download as a text file with a custom name.
100% Private
Your date of birth never leaves your device.
Mobile‑Friendly
Works perfectly on all screen sizes.
❓ FAQ
Age is calculated by comparing your date of birth with the reference date. The tool accounts for leap years and provides a precise breakdown in years, months, and days.
Yes, use the "Age at Date" field to set any date (past or future). The calculator will show your age at that specific date.
Absolutely. The tool uses JavaScript's Date object, which correctly handles leap years when calculating differences between dates.
No, all calculations happen locally in your browser. Your personal data never leaves your device.
100% free, part of All‑in‑One Utility Hub.