Free exact age calculator
Age Calculator: How Old Am I?
Enter your date of birth to find your exact age in years, months and days, plus your total months, weeks, days, hours, minutes and seconds.
Una makes the numbers a little more fun after the serious math is done.
Calculate your exact age
Your next birthday is , a . That is days away, and you will turn .
More birthday facts
Your current age year
You are days into age . Your next birthday is days away.
Una says:
Turn this result into a colourful image you can share or copy. The card does not print your birth date or a birthday-carrying link.
Choose the calculator that matches your question
For a different question, use the calculator built for it: when is my next birthday?, how old was I on a certain date?, how many days old am I?, what year was I born?, or what is the age difference between two people?
Popular age and birthday calculators
These tools answer the most common follow-up questions after you know your age today.
More ways to measure your age
Break your age into months, weeks, hours, minutes or seconds, then head into Una's just-for-fun age worlds.
How does the age calculator work?
The calculator compares your date of birth with today's date. It counts complete calendar years first, then complete months, then the remaining days. That gives you the age people normally mean when they say someone is 18 years, 4 months and 12 days old.
If you searched for an age calculator by date of birth, this is the same calculation. Your birthday is the starting date, and today's date is the ending date. You do not need to work out the number of days or months yourself.
Months are not all the same length, and leap years add an extra day to February. For that reason, an exact calendar age should not be calculated by simply dividing a number of days by 365 or a number of months by 30.
How old am I in days, weeks and months?
Your result also shows other ways to measure your time alive. If you want a closer look, the age in months calculator counts complete calendar months, while the age in weeks calculator turns your elapsed days into full seven-day weeks. Total days are counted between your birth date and today. Hours, minutes and seconds use your local browser time. For a dedicated elapsed-time view, try the age in hours calculator, age in minutes calculator or age in seconds calculator.
If you know your birth time, you can add it for a more precise elapsed-time result. If you do not, the calculator starts the clock at midnight on your birth date. That keeps the tool simple while making the assumption clear.
What happens with a February 29 birthday?
Leap-day birthdays need one special rule when the current year does not contain February 29. For calendar-age comparisons, this calculator uses the last valid day of February. Your legal or personal birthday convention may differ depending on where you live.
Birthday facts hidden inside your date of birth
Your birth date can tell you more than your current age. The result shows which numbered day of the year you were born on, whether your birth year was a leap year, the date of your next age divisible by five and your next decade birthday. A round birthday here simply means an age such as 25, 30, 35 or 40. It is a fun calendar marker, not an official milestone.
Your age is more fun than one number
Once you know your exact age, you can keep going. Find how many days old you are, check when your next birthday arrives, see how old you were on another date, calculate your half birthday, or explore dog years, cat years and Una's imaginary age worlds.
Age calculator questions
How do I calculate my exact age?
Enter your date of birth. The calculator compares it with today using real calendar months, month lengths and leap years.
Can I use this as an age calculator by date of birth?
Yes. Enter your date of birth and the calculator gives your exact calendar age today, plus totals in months, weeks, days, hours, minutes and seconds.
How many days old am I?
Your total days old is the number of calendar days between your birth date and today.
Does the calculator save my birthday?
Your birthday is not sent to Fun Age Calculator. Your browser can remember it temporarily in session storage so related calculators can refill the date in the same tab. You can clear it with Forget Birthday or by closing the tab.
How are February 29 birthdays handled?
For calendar-age calculations, February 29 anniversaries are clamped to the last valid day of February in non-leap years.
What is my next round birthday?
The result shows the next age divisible by five, such as 25, 30, 35 or 40, and the calendar date when you will reach it.
How old was I on a certain date?
Use the Age on a Date calculator when you want your exact age on a past or future date instead of your age today.
What year was I born if I know my age?
Use the Birth Year Calculator. Age alone can point to two possible birth years, so it can also use a reference date and whether your birthday had happened yet.