Date & Age Calculator — Great Scott Labs

Count the days between two dates, or work out an age from a birthdate — instantly, with no ads.

Start date

End date

—

Pick your dates above

How it works: "days between" counts the whole days from the start date to the end date. "Age from birthdate" gives the age in completed years on the chosen date (defaulting to today), accounting for whether the birthday has happened yet this year — leap years included. Everything runs in your browser; nothing is uploaded.