“How old was I on my wedding day” or “how old will I be in 2050” are both questions this calculator answers directly, working out your exact age between any two dates, broken all the way down to years, months, days, hours, minutes, and seconds.

How to use this age calculator

1. Enter your Date of Birth.
2. Choose whether to calculate your age as of Today, or as of A Specific Date (past or future).
3. Review your age broken down into Years, Months, Days, Hours, Minutes, and Seconds, plus your Total Days Lived and countdown to your next birthday.
4. Check your Western zodiac sign, Chinese zodiac animal, and life stage based on your current age.

What this age calculator does

Rather than just giving a single age-in-years figure, this calculator computes the full calendar difference between your date of birth and the reference date, using the Gregorian calendar and accounting for varying month lengths and leap years, then breaks that difference into every unit from years down to seconds.

Calculating age as of any date, not just today

Setting the reference date to a specific past or future date, rather than today, lets you answer questions like how old you were at a historical event or milestone, or how old you’ll be on a future date you’re planning around, using the exact same precise calendar math as the standard today-based calculation.

Zodiac and life stage: for reference, not science

Alongside the precise age breakdown, this calculator shows your Western zodiac sign (based on your birth date) and Chinese zodiac animal (based on your birth year), plus a general life-stage label based on your current age. These are included for fun and general reference only, they’re cultural and astrological conventions, not scientific or medical classifications.

Frequently asked questions