Age Calculator – Calculate Your Exact Age
Calculate how old you are using the age calculator below. Get your age in years, months, days, or seconds.
Your Age:
| Age in Months: | |
| Age in Days: | |
| Age in Hours: | |
| Age in Minutes: | |
| Age in Seconds: | |
| Next Birthday: |
On this page:
Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.
Pateakia has worked in education for 15 years and has three degrees, including a PhD, Master's degree, and Bachelor's degree. She specializes in mathematics.
How Old Are You?
Ever want to know your age in days? Our age calculator can find your age in years, months, days, hours, minutes, and seconds!
Enter your date of birth and the date to compare it to, and the calculator will find your age on that date. It will even calculate the days until your next birthday.
How to Calculate Your Age
We have found that the easiest way to find out how old you are by hand is by subtracting the current year from your birth year. Then, if you haven’t already had a birthday yet this year, subtract one from your age.
age in years = current year – birth year
This is the same basic formula that you can use to find out how old you were on any date.
How Many Days Old You Are?
Are you wondering what your age is in days? In our experience, the most accurate way to find out how old you are in days is to use an age calculator since it accounts for things like leap years.
But, you can also calculate how old you are in days by multiplying your age plus one by 365.25. Then, subtract the number of days until your next birthday.
age in days = ((age in years + 1) × 365.25) – days until birthday
This formula uses 365.25 days per year to account for leap years, where every four years there is an extra day – February 29.
You can confirm this using our date calculator.
For example, if you are 23 years old and your birthday is in 45 days, you can find out how many days old you are using the following formula:
age in days = ((23 + 1) × 365.25) – 45
age in days = (24 × 365.25) – 45
age in days = 8,766 – 45
age in days = 8,721
So, you would be 8,721 days old using this formula.
You can also find out the age gap between two people using our age difference calculator.