MyCalculatorHow age is calculated
We compare calendar dates directly: years, months and days are counted from the birth date to the reference date, borrowing from the next unit where needed (the same way you'd count age by hand on a calendar). Total days lived is the exact day count between the two dates.
Frequently asked questions
Does time zone affect the result?
No. This calculator compares calendar dates only, not exact times, so it gives the same age result regardless of time zone.
Can I calculate age as of a past or future date?
Yes. Use the "Calculate age as of" field to set any reference date instead of today.