Enter your date of birth and find your exact age in years, months, and days — plus your total days lived and a countdown to your next birthday. Results update instantly when you change either date.
Defaults to today's date. Change the second field to calculate age on a past or future date.
Select your date of birth to see your age.
Frequently Asked Questions
How does the Age Calculator work?
Enter your date of birth and the calculator compares it to a reference date (today by default). It returns your age broken down into years, months, and days, plus the total number of days you have lived.
Can I calculate age on a specific date?
Yes. Change the Calculate age as of field to any date — past or future — to find out how old you were or will be on that day.
How is next birthday calculated?
The tool finds your next birthday after the reference date and counts the days remaining. If your birthday falls on the reference date, it shows 0 days.
Does it account for leap years?
Yes. The calculator uses actual calendar dates, so leap years and varying month lengths are handled correctly.
Can I calculate days between two dates?
Yes. Use the Date Calculator to add or subtract days, or find the difference between any two dates.
Is this tool free and does it work on mobile?
Yes on both counts. The Age Calculator on draft21 is completely free with no sign-up required and works on all devices.