Your age is calculated by finding the difference between your date of birth and today's date, accounting for leap years and varying month lengths to give you the precise number of years, months, and days.
Can I calculate my age on a specific date?
Yes — use the "Calculate age as of" field to find your age on any past or future date, useful for legal, historical or planning purposes.
What are age milestones?
Age milestones are notable ages such as 18, 21, 30, 50 and 100. The calculator shows the exact date you reached or will reach each milestone.
Can I share my age calculation?
Yes — use the "Copy link" button to copy a shareable URL that encodes your date of birth and the calculation date, so you can send it to anyone.
Enter your date of birth above to calculate your age.
How this calculator works
Enter your date of birth and the tool calculates your exact age accounting for leap years, varying month lengths and calendar differences. The "calculate as of" field lets you find your age on any past or future date — useful for historical research or planning ahead. Results are shareable via URL.