Exact Age Calculator Online – Calculate Your Age Precisely
Age Calculator
Date Selection
Age Results
Enter valid dates to calculate age
The age calculator tells you your exact age in years, months, and days from any birth date to today or any target date. It handles leap years correctly and works for any date range.
How Age Is Calculated
Age counts complete years since birth. Subtract the birth year from the current year. If the birthday has not yet passed this year, subtract one more year. Then count the remaining months and days. Leap years affect the count when the birthday is February 29 — most calculators treat March 1 as the birthday in non-leap years.
Age in Different Units
| Age | Years | Months | Weeks | Days |
|---|---|---|---|---|
| 1 year old | 1 | 12 | 52.18 | 365 |
| 5 years old | 5 | 60 | 260.89 | 1,826 |
| 18 years old | 18 | 216 | 939.2 | 6,574 |
| 30 years old | 30 | 360 | 1,565.4 | 10,958 |
| 65 years old | 65 | 780 | 3,391.7 | 23,741 |
Finding Age Between Two Specific Dates
You can calculate the age or time difference between any two dates, not just from birth to today. This is useful for calculating how long you have worked somewhere, how long since an event, or the age of a document or account. Enter the earlier date as the "from" date and the later date as the "to" date.
Zodiac and Chinese Zodiac by Birth Year
| Western Zodiac | Approx. Dates | Chinese Zodiac Year 2024 | Animal |
|---|---|---|---|
| Aries | Mar 21 - Apr 19 | 2024 | Dragon |
| Taurus | Apr 20 - May 20 | 2023 | Rabbit |
| Gemini | May 21 - Jun 20 | 2022 | Tiger |
| Cancer | Jun 21 - Jul 22 | 2021 | Ox |
| Leo | Jul 23 - Aug 22 | 2020 | Rat |
Frequently Asked Questions
How do I calculate someone's age from their date of birth?⌄
Subtract the birth year from the current year. If the birthday has not occurred yet this calendar year, subtract 1 from the result. For a more precise age in months and days, count the remaining months after the last birthday, then the days after the last complete month.
How many days old am I?⌄
Multiply your age in years by 365.25 (to account for leap years) for a rough total. For an exact count, use the calculator: it counts every day from your birth date to today, including leap days.
What is my age if I was born in 1990?⌄
As of 2025, someone born in 1990 is 34 or 35 years old, depending on whether their birthday has passed in 2025. The exact age depends on the specific birth date and today's date.
How is age calculated when born on February 29?⌄
People born on February 29 (leap day) are often counted as turning a year older on either February 28 or March 1 in non-leap years. Most systems and legal standards in the US use March 1. This calculator follows that convention.
Can I use this to calculate age in months for a baby?⌄
Yes. For infants, the calculator shows the exact number of full months elapsed, which is how pediatricians track development milestones. A baby born July 15 is exactly 6 months old on January 15.