Key takeaways
- 01Age is shown in years, months and days with no rounding — plus total days, weeks, hours and minutes lived.
- 02You can set any reference date to find out how old you will be on a future date or were on a past one.
- 03Your date of birth is never sent to a server — all calculations run locally in your browser.
When You Need More Than Just the Year
Most of the time, "I'm 34" is enough. But sometimes you need the full picture — how many days until a milestone birthday, exactly how old a child is in months for a medical form, or how many total days you've been alive for a 10,000-day celebration. A quick mental calculation from a birth year only gets you to the year; the months and days require actual date math.
The age calculator handles all of that at once. Enter a birthday and the tool instantly returns your age broken down in every meaningful unit: years, months and remaining days, plus the total count of days, weeks, hours and minutes you've lived, the weekday you were born on, and how many days remain until your next birthday.
How to Calculate Your Age
Results appear instantly — no form submission needed.
- 01
Enter your date of birth
Use the date picker or type a birth date in the input field. The calculator accepts any date from the distant past to the present.
- 02
Set a reference date (optional)
The reference date defaults to today. Change it to any past or future date to find out how old you were — or will be — on that day.
- 03
Read all the results
The tool shows your age in years, months and days; total days, weeks, hours and minutes lived; the weekday you were born; and a countdown to your next birthday.
Everything the Calculator Returns
- 01Exact age in years, months and remaining days
- 02Total days and weeks lived (leap days included)
- 03Total hours and minutes since birth
- 04The day of the week you were born
- 05Days remaining until your next birthday
Your Data Stays on Your Device
The age calculator runs entirely in your browser. Your date of birth is never transmitted to a server, never logged and never stored. Handytool does not retain any of the dates you enter.
The tool is free to use with no account and no sign-up. It works on any device — desktop, phone or tablet — and requires no app to install.
Age Calculator FAQ
How do I calculate my exact age?
Enter your date of birth and leave the reference date as today. The calculator returns your exact age in years, months and days, plus total days, weeks, hours and minutes lived.
How many days have I lived?
Enter your birthday with today as the reference date. The total-days field counts every day since you were born, including leap days.
Can I calculate age on a specific date?
Yes. Change the reference date to any past or future day to see how old you were or will be on that date. Useful for retirement planning, historical questions or future milestones.
Which day of the week was I born on?
The calculator displays your birth weekday automatically based on your date of birth — no extra steps needed.
Is my date of birth saved anywhere?
No. The calculator is fully local — your birthday never leaves your browser. Handytool does not store, log or transmit any dates you enter.
Is the age calculator free?
Yes. Every Handytool is free to use with no sign-up, no limits and no watermarks.