Days lived

What it's for

Years are a convenient and rather mute measure: saying «thirty-six years old» has no effect, saying thirteen thousand days does. It's the kind of number that goes on a birthday card, in a caption, in a presentation, or that you look at once in a while to realize how much time has really gone by. The page gives days, weeks and months all together.

How it's counted

Two calendar dates, the date of birth and today's, get compared, and the days in between are counted. Leap years are already in there, because nothing is multiplied by 365: what's read is the real calendar, in which 29 February either exists or doesn't.

The count is in whole days, not hours: what matters is the dates, not the time you open the page. That's a deliberate choice, because comparing an instant with a date leads to a one-day error depending on the hour and the time zone, and that's a defect deliberately removed here.

Days, weeks and months, all exact

Days are calendar days, weeks are whole weeks (the days divided by seven, without the remainder) and months are the whole months since birth, counted on the calendar the same way as for an age: one month after January 31 is February 28, the last day of the month. Nothing is divided by 30.44, the average length of a month, because near the day you were born that calculation is off by a month.

So the months are the same as in Age Calculator, the page for the exact age and the next birthday: the years times twelve, plus the months. For the same date of birth, the two pages give the same days, the same weeks and the same months.

Nearby tools

For the days between any two dates there is Date Difference, and for how long until a date Event countdown. If what you need is working days, which are a different thing, the page is Business days.