Date Calculator
Find the difference between two dates, or add or subtract days from a date -- all handled locally in your browser.
Enter details
Result
Enter dates and calculate to see the result here.
How it works
Choose whether you want the difference between two dates, or to add or subtract a number of days from a date. For a difference, the calculator shows the gap in years, months and days along with the total number of days, regardless of which date you enter first. For adding or subtracting, enter a start date and a whole number of days to get the resulting date. Leap years and different month lengths are handled automatically using standard calendar arithmetic. Everything is calculated locally in your browser.
Does this handle leap years and month-length differences?
Yes. All calculations use standard calendar arithmetic, so leap years and varying month lengths are handled automatically.
Are my dates stored or sent anywhere?
No. All calculations happen entirely in your browser. Analytics only records that the tool was used, never the dates you enter.