Age Calculator: How Old Am I? Or ...
How Old Was I, How Old Will I Be, or When Will I Be?

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The online Age Calculator on this page will quickly calculate your exact age as of a past, current, or future date.

This free online date calculator will calculate how old you are in years, months, and days for any ending date you enter, and tell you how old you are in months, weeks, days, hours, minutes, and seconds.

Plus, the built-in birthday calculator will also tell you how many days remain until your next birthday, and on what day of the week your next birthday will fall on.

And finally, the calculator can even tell you on what date you will turn a certain age (e.g., When will I be 59.5 years old?, When will I be 18?).

Note that if you would like to learn how to calculate age manually (subtract one date from another without having to use a calculator), please visit the Chronological Age Calculator that shows you how to determine the age of a person in years, months, and days as of a given test date.

With that, let's use the following calculator to calculate the number of years, months, days, weeks, hours, minutes, and seconds that have passed since your date of birth.

Age Calculator
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Instructions: Select the month and day and enter the 4-digit year of your date of birth.

Next, select the month and day and enter the 4-digit year of the date you would like to calculate your age for.

Next, if you would also like the date when you will turn a certain age, enter that age in the field provided.

Finally, click the "Calculate Age" button and scroll down to view the results.

Note: If you are using this as an age difference calculator, enter the birth date of the oldest of the two on the first line, and the youngest of the two on the second line.

Mouse over the blue question marks for a further explanation of each entry field. More in-depth explanations can be found in the glossary of terms located beneath the calculator.

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Help Date of birth:
Help Date to calculate age for:
Help Optional: When will I be this age?
Help Age:
Help Months old:
Help Weeks old:
Help Days old:
Help Hours old:
Help Minutes old:
Help Seconds old:
Help Days until your next birthday:
Help You will be age 59.5 on:
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Age Calculator Glossary of Terms

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Date of birth: Select the month and day and enter the 4-digit year of your date of birth.

Date to calculate age for: Select the month and day and enter the 4-digit year of the date you would like to calculate your age for.

When will I be this age? If you would like to know what date you will reach a certain age, enter an age that is greater than your current age. Otherwise leave blank. Note that you can enter a decimal number (59.5, for example).

Age: This is your age as of the ending date you entered.

Months old: This is the total number of months that have passed since your DOB.

Weeks old: This is the total number of weeks that have passed since your DOB.

Days old: This is the number of days that have passed since your DOB.

Hours old: This is the number of hours that have passed since your DOB.

Minutes old: This is the number of minutes that have passed since your DOB.

Seconds old: This is the number of seconds that have passed since your DOB.

Days until your next birthday: This is the number of days until your next birthday.

You will be age __ on: If you entered a future age in the top section of the calculator, this row will list the approximate date you will reach the future age.

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