Age Calculator
Find your exact age in years, months and days from a date of birth — plus total months, weeks, days and hours lived, the weekday you were born on, and a countdown to your next birthday.
How to use age calculator
- Enter your birth date
Pick your date of birth from the calendar field.
- Set the 'age at' date
Defaults to today, but you can choose any date to calculate age on.
- Calculate
Click Calculate to see years, months, days, totals and more.
Features
Age is shown in years, months and days, not just a rounded number.
See exactly how long you've been alive in whichever unit you need.
See which day of the week you were born on and a countdown to your next birthday.
Calculate age on a future or past date, not only today.
Supported formats and limitations
Text and structured input supported by this tool.
Use cases include personal workflows, content preparation, and quick checks. Review output before relying on it for legal, financial, accessibility, or production decisions.
Frequently asked questions
Does it account for leap years?
Yes. The calculation uses real calendar dates, so February 29ths are handled correctly.
Can I calculate age on a past date?
Yes — set the 'age at date' field to any date to see how old someone was then.
What if I pick a future birth date?
The tool detects that the birth date is after the reference date and asks you to correct it.
How is 'total months' worked out?
It's the exact number of complete calendar months between your date of birth and the reference date (years × 12 + the remaining months from the years/months/days breakdown) — not days ÷ 30, which would drift.
I need to check government job age eligibility with relaxation, not just my age — is there a tool for that?
Yes — use the dedicated Government Job Age Eligibility Calculator, which lets you enter the exam's cutoff date, minimum/maximum age band and any category relaxation.