Calculate the days between two dates, or add/subtract days to a date
This tool offers two date calculations: Date Difference, which computes how many days lie between two dates, and Add/Subtract Days, which adds or subtracts days to a given date to produce a new date.
For example, to find out what day it is 90 days from today, choose Add/Subtract Days, enter the start date and 90, and you'll get the result. To find how long between two holidays, choose Date Difference and enter both dates.
All calculations run instantly in your browser — no internet needed.
In the Date Difference section, choose two dates and the tool automatically shows the days and weeks between them.
In the Add/Subtract mode, enter a start date and a number of days (negative to go back) to get the new date.
By default it calculates the days between the two dates, not including the start date. Add 1 if you want to include it.