About LifeInDays
Small calculators for the milestones your birthday never mentions.
LifeInDays is a collection of free calculators that measure a life in units other than years: days lived, seconds elapsed, midpoints, and the strange little dates — like the day you become older than your parent was when you were born — that hide in every calendar.
Our promises
- Free. Every calculator works fully without payment or sign-up.
- Private. Every calculation runs in your browser. Birth dates you enter are never transmitted or stored by us.
- Accurate. All date math counts real calendar days, so leap years and unequal months are handled correctly.
Accuracy notes
Zodiac cusp dates can shift by a day between years; Chinese zodiac signs traditionally change at Lunar New Year rather than January 1 (we note this in results); generation boundaries are common conventions, not standards. For anything that matters legally — age verification, documents — rely on official records, not a novelty calculator.
Contact
Questions or a milestone idea we should add? Email us at [email protected].