Age Calculator
Calculate your exact age in years, months, weeks, days, hours, and minutes. Works for any birth date to any target date.
Our free Age Calculator tells you your exact age in years, months, weeks, days, hours, and minutes from any birth date to any target date. Enter your date of birth and the tool instantly computes… Use the fields above to enter values and get an instant answer. All processing happens on your device.
About This Calculator
Our free Age Calculator tells you your exact age in years, months, weeks, days, hours, and minutes from any birth date to any target date. Enter your date of birth and the tool instantly computes a precise breakdown. Use it to check eligibility requirements (voting age, retirement age, legal drinking age), plan milestone celebrations (turning 10,000 days old, for example), calculate the age difference between two people, or simply satisfy your curiosity about exactly how old you are today. The calculator handles leap years, variable month lengths, and timezone-neutral date math for reliable results.
How It Works
Enter your birth date and optionally a target date (defaults to today). The calculator computes the difference between the two dates by counting full years, then remaining full months, then remaining days. It separately calculates total weeks, total days, total hours, and total minutes for additional perspective. Leap years (every 4 years, except centuries not divisible by 400) and varying month lengths (28-31 days) are fully accounted for so the result is accurate to the day.
How to Use
- Enter your values in the calculator fields above
- Click the calculate button or let the calculator auto-update
- Review your results instantly
- Adjust values as needed to see different scenarios
Frequently Asked Questions
How accurate is this age calculator?
The calculator is precise to the day. It correctly accounts for leap years and months of different lengths. The hours and minutes figures assume full 24-hour days from your birth date to the target date — the exact hour of birth is not factored in, but the day-level accuracy is perfect.
Can I calculate my age on a future or past date?
Yes. Enter any target date — past or future — to see how old you were or will be on that date. This is handy for checking retirement eligibility, school enrollment age, or milestone birthdays.
How do I calculate the age difference between two people?
Calculate each person's age as of the same target date (today, for example), or enter the older person's birth date and use the younger person's birth date as the target date to see the exact gap in years, months, and days.
Why do the months and days not always add up the way I expect?
Months have different lengths (28-31 days), which means "one month" can mean 28, 29, 30, or 31 days depending on which months you span. The calculator handles this correctly but the result can sometimes feel counterintuitive — for instance, February 28 to March 28 is one month, but January 31 to February 28 is also counted as one month even though it is fewer days.
What are some fun age milestones to check?
Try finding out when you will turn (or already turned) 10,000 days old, 1 billion seconds old, or 1,000 weeks old. Many people also like to check their "golden birthday" — the birthday when your age matches the day of the month you were born (e.g., turning 17 on the 17th).
Why Use Our Free Age Calculator Online?
Our Age Calculator uses standard formulas and works in your browser—no install or sign-up. Use it for homework, travel, or everyday conversions. Results are instant and we don't collect your inputs. Explore our other math and unit converters from the link below.