Age Calculator by Date of Birth — Years, Months, Days
Use our free age calculator to calculate your age in years, months, and days. Our age calculator in years months days provides detailed age calculations including total days, weeks, hours, and minutes lived.
Calculate your exact age in years, months, days, weeks, hours, and minutes. Discover your zodiac sign, Chinese zodiac, life expectancy, and more fun facts about your birth date. Perfect for answering "How old am I?" questions.
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Leave as today's date to calculate current age
For life expectancy calculation
For life expectancy calculation
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Age calculator by date of birth (Australia)
Most people searching for an age calculator by date of birth Australia need a precise answer for a form, sports age group, licence renewal, or school cut-off — not a rough “born in 1995” guess. Enter the date of birth above (day/month/year as you know it) and, if needed, change the “current” date to the day you must be that age.
Australian processes usually care about completed years on a specific calendar date. This tool also shows months and days so you can see whether someone turns a milestone birthday before a deadline. Leap-year births (29 February) are handled when the target year is not a leap year. Nothing is uploaded — the math runs in your browser.
Tip: for “how old will I be on …?” set the as-at date to that day. For age between two historical dates, try our related date tools linked below.
How to Use This Calculator
Step-by-Step Guide
- 1. Enter your date of birth in the first field
- 2. Optionally change the current date (defaults to today)
- 3. Click "Calculate Age" to see your exact age
- 4. View your age in different time units
- 5. See when your next birthday is
Features
- • Calculate age in years, months, and days
- • See total days, weeks, hours, and minutes lived
- • Find out days until your next birthday
- • Discover your zodiac sign and Chinese zodiac
- • Calculate life expectancy by gender and country
- • See what day of the week you were born
- • Fun facts about your life milestones
- • Works for any date in the past
Frequently Asked Questions
How accurate is this age calculator?
This calculator is very accurate and accounts for leap years. It calculates your exact age down to the day, including the precise number of months and days.
Can I calculate age for any date?
Yes! You can change the current date to calculate how old someone was or will be on any specific date in the past or future.
What if I was born on a leap year?
The calculator properly handles leap years and February 29th birthdays. It will show your age correctly even in non-leap years.
Why are there different age formats?
Different formats help you understand your age in various contexts - years for general age, days for precise calculations, and weeks/hours for fun comparisons.
How accurate is the life expectancy calculation?
The life expectancy is based on general statistics for your gender and country. It's a rough estimate and doesn't account for personal health, lifestyle, or family history. It's meant for entertainment and general reference only.
What zodiac system is used?
The calculator uses the Western zodiac system (Aries, Taurus, etc.) and the Chinese zodiac system (Rat, Ox, Tiger, etc.). The Western zodiac is based on your birth date, while the Chinese zodiac is based on your birth year.
How age from date of birth is calculated
Enter your date of birth (and optionally an “as at” date). The calculator counts completed years, then remaining months and days, accounting for leap years — the same approach used for Australian age-based eligibility checks.
- Years = completed birthdays between DOB and as-at date
- Months/days = remainder after the last birthday
- Leap-day births are handled when the as-at year is not a leap year
Worked example: born 15 March 1995, as at 19 July 2026
- Last birthday before 19 July 2026 was 15 March 2026 → 31 years completed.
- From 15 March to 19 July is 4 months and 4 days.
- Exact age = 31 years, 4 months, 4 days.
- Change the as-at date to check age on a licence, visa, or sports cut-off date in Australia.
Frequently Asked Questions
How do I calculate age by date of birth in Australia?
Does this handle leap years?
Can I calculate age on a future date?
Is my date of birth stored?
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