Date Difference Calculator

Find the total number of days, weeks, months, and years between any two dates, plus an accurate calendar breakdown.

Date Range

Start Date

End Date

Total days is the exact number of 24-hour periods between the two dates.

Total months uses an average month of 30.4375 days (365.25 / 12). Total years uses 365.25 days.

The calendar breakdown uses real calendar arithmetic, borrowing days and months so it reads naturally, for example "1 year, 3 months, 4 days".

100% client-side. Your dates never leave your browser.

This Date Difference Calculator processes text and inputs instantly using client-side JavaScript algorithms.

No. Your text never leaves your browser window and is cleared as soon as you close or refresh the tab.

General Disclaimer: This utility is provided as-is for productivity and content editing. Results should be reviewed for accuracy.