Age Calculator - Exact Age & Days

Free age calculator (2026). Get your exact age in years, months, and days, plus total days alive and a countdown to your next birthday.

Your Dates

Date of Birth

Age at Date

Enter your birth date to see your age stats.

How Age Calculation Works

Enter your date of birth and the date you want to calculate your age for (defaults to today). We rely on the Gregorian calendar to calculate the exact number of full years, months, and remaining days.

Methodology

Age is calculated by subtracting the birth year from the target year, then adjusting for whether the birth month/day has passed in the target year. Leap years are fully accounted for in the 'Total Days' count.

Definitions

Gregorian Calendar

The most widely used civil calendar today, which our calculator uses for all date logic.

Age in Days

The total number of days elapsed between the start date and end date, accounting for leap years.

Why Calculate Your Exact Age?

While most of us know our age in years, knowing your exact age in months, days, and even minutes can be a fun way to look at your life's timeline. Whether you're tracking a milestone, calculating the exact age difference between friends or family members, or just curious about how many days you've been alive, our tool provides precise calculations based on the Gregorian calendar.

How to Use This Calculator

Simply enter your date of birth in the 'Date of Birth' field. The calculator defaults to today's date for the comparison, but you can change the 'Age at Date' to any past or future date. This is perfect for seeing how old you were at a historical event or how old you will be at a future milestone.

Age Calculation Examples (2026)

The table below shows examples of age calculations for different birth dates and target dates. These examples demonstrate how age is calculated in years, months, and days, accounting for leap years and varying month lengths.

Birth Date	Target Date	Age (Years)	Age (Months)	Age (Days)	Total Days
Jan 1, 2000	Jan 1, 2026	26	312	9,506	9,506
Feb 29, 2000	Feb 28, 2026	25	311	9,475	9,475
Dec 31, 1999	Jan 1, 2026	26	312	9,507	9,507
Mar 15, 2010	Mar 15, 2026	16	192	5,844	5,844
Jul 4, 2005	Jul 4, 2026	21	252	7,670	7,670
Oct 31, 1995	Oct 31, 2026	31	372	11,321	11,321

Understanding the Calculation

Our calculator uses the standard Gregorian calendar, accounting for leap years (years divisible by 4, except for end-of-century years unless divisible by 400). The 'Total Days' count includes all the extra days from leap years, ensuring 100% accuracy. To calculate the exact number of days between two specific dates, use our [date calculator](/time/date-calculator) for precise date arithmetic.

Frequently Asked Questions

Q:How is exact age calculated?

We calculate age by measuring the full years, full months, and remaining days between your birth date and the target date. This method adheres to legal and common usage, correctly adjusting for shorter months and leap years.

Q:Does this calculator account for leap years?

Yes, our calculator fully accounts for leap years (Feb 29th) when calculating the number of days you have lived. A year is counted as 366 days if it includes a leap day.

Q:Can I calculate age for a future date?

Yes! You can change the 'Age at Date' field to any future date. This is great for planning birthdays, retirements, or other future anniversaries.

Q:How do you calculate age difference?

To find the difference between two people, simply note the 'Total Days' lived for each person and subtract the smaller number from the larger one, or use our Date Calculator for direct date subtraction.

Q:What is 'Chronological Age'?

Chronological age is the amount of time that has passed from your birth to the given date. It is your age in terms of years, months, days, etc. This is the primary definition used for legal purposes and birthdays.