Age Calculator Made Simple.
Calculate your age from your date of birth in years, months and days — instantly. See total days lived and your next birthday countdown in one beautifully simple tool.
More than just your birthday.
Quick answers for age gaps, dates, pets, and age systems around the world.
How to calculate age from date of birth
An age calculator measures completed calendar time between your date of birth and a reference date. It counts full birthday anniversaries first, then the remaining calendar months and days. Month lengths and leap years are included automatically.
- Enter your date of birth. Choose the day, month and year.
- Use today's date or choose another date. Your result updates automatically.
- Read the breakdown. View completed years, months, days and the next birthday.
Age between two dates
This is calendar age, not the number of hours or seconds since birth.
One library, many useful tools.
Find the right calculator for your question without scrolling through a long list.
Age & Date
Birthdays, milestones, date differences and time intervals.
Age and date toolsAge Around the World
Korean, Chinese, Hijri, Nepali and other calendar methods.
Country age toolsPet & Nature
Dog, cat, bird, horse and tree age estimators.
Animal and nature toolsLife & Fitness
Retirement, sleep, heart age and fitness tools.
Life and health toolsAnswers that make sense.
Clear answers about calendar age, accuracy, leap years and privacy.
Still have a question? Contact usHow do I calculate my age from my date of birth?
Enter your date of birth and keep today's date selected, or choose a past or future reference date. The calculator automatically returns completed calendar years, months and days.
Is this online age calculator free?
Yes. The age calculator and other tools are free to access, with no account required. Some pages may show advertising.
Does the calculator account for leap years?
Yes. The Gregorian calendar calculations include the real number of days in every month and leap year. For February 29 birthdays, this tool uses February 28 in non-leap years; official conventions can vary.
Can I find my age on a specific date?
Yes. Change the reference date to calculate your age as of that day, including historical dates or future milestones after your birthday.
Does the birthday timer show my exact age in seconds?
No. Date-only birth inputs cannot determine your precise elapsed lifetime in seconds without your birth time and time zone. The live countdown measures time until local midnight on your next birthday.
Are my birth date and calculator inputs saved?
The main age calculation runs in your browser without an account. Advertising and hosting services may process technical data such as cookies or IP addresses; see our Privacy Policy.
Find your age. Discover what comes next.
Accurate calendar dates, clear results and plenty more to explore.
Calculate your age