Age Calculator
Calculate your exact age in years, months and days from your date of birth.
Open calculator Free, fast & private
Age Calculator
Calculate your exact age in years, months and days.
No sign-upInstant resultsNothing uploaded
Instant calculation
Calculate Your Age
Enter your date of birth to calculate your exact age.
Your result
Calculation
Your numbers stay in this browser. Nothing is uploaded or saved.
10 focused date tools
Age & Date Calculators
Choose a calculator built for the exact date answer you need.
Date Difference Calculator
Find the exact difference between any two dates in years, months, days and weeks.
Open calculatorBirthday Countdown
Count down the days, weeks and months until your next birthday.
Open calculatorAge on a Specific Date
Find out how old you were (or will be) on any specific date in the past or future.
Open calculatorDays Since Birth
Calculate the total number of days you have been alive since your date of birth.
Open calculatorMonths Since Birth
Find out how many months you have been alive, plus extra days.
Open calculatorWeeks Since Birth
Calculate how many weeks you have been alive, with extra days.
Open calculatorNext Birthday Calculator
Find out the exact date of your next birthday and how many days until then.
Open calculatorRetirement Age Calculator
See your chosen retirement target date and the time remaining until then.
Open calculatorPet Age Calculator
Convert your dog or cat's age to human years using veterinary life stage estimates.
Open calculatorSimple by design
How It Works
Get your exact age in three quick steps.
- 01
Enter your birth date
Type your birth year, month and day in the clearly labeled fields.
- 02
Calculate instantly
Select Calculate Age and see your exact age in years, months, days, weeks and total days.
- 03
Explore related tools
Try the date difference, birthday countdown and retirement calculators for more date calculations.
Your birth date stays private
All calculations happen in your browser. Your birth date is never uploaded, stored or shared.
Common questions
Frequently Asked Questions
How do I calculate my exact age?
Enter your birth year, month and day in the Age Calculator and select Calculate Age. You will see your age in years, months, days, weeks and total days.
Does the age calculator handle leap years?
Yes. The calculator accounts for leap years, varying month lengths, and Feb 29 birthdays. If you were born on Feb 29, your age updates on Mar 1 in non-leap years.
Are the calculators free to use?
Yes. All age and date calculators are free. No account, sign-up or payment is required.
Is my birth date saved or shared?
No. All calculations run locally in your browser. Your birth date and results are never uploaded, stored or shared with anyone.
How accurate are the date difference calculations?
The calculations use a calendar-accurate algorithm that counts each day individually, accounting for leap years and correct month lengths.
Can I calculate my age on a past date?
Yes. Use the Age on a Specific Date calculator. Enter your birth date and any past or future date to see your exact age on that day.
Learn about age calculation
Age Calculation Guides
Understand how age is calculated, how leap years work, and how to count the days you have lived.
How to Calculate Age — Complete Guide
Learn how age is calculated from a birth date, including years, months, days, leap years and common edge cases.
Read guideHow Age Is Calculated — Behind the Algorithm
Understand the calendar math behind age calculation: subtracting dates, handling leap years and counting total days.
Read guideHow Many Days Have I Lived?
Learn how to count every day you have been alive, why the number surprises most people and how to find milestone days.
Read guideLeap Year Birthday — How Age Is Calculated for Feb 29
How age works when you were born on February 29. Learn the legal and mathematical conventions for leap day birthdays.
Read guideReady to calculate your age?
Get your exact age in years, months and days, plus total weeks and days lived.