Date and Age Calculator
Date Difference, Date Math and Age Tool
Calculate the difference between two dates, add or subtract time from a date, or work out an exact age.
About Date Calculations
Date calculations account for the varying lengths of months and for leap years, which add an extra day every four years (with a century exception). Counting the difference between two dates in calendar years, months, and days is more involved than simply dividing the total number of days.
This tool computes precise differences, performs date arithmetic such as adding business-relevant amounts of time, and determines an exact age along with the number of days until the next birthday. All calculations run entirely in your browser.
