Date Difference Calculator
Find the number of calendar days between two dates, including a signed result.
Your inputs stay on this device.
Result
—
How to use
Choose both dates and calculate. Results use calendar days.
How it works
End date minus start date using UTC calendar dates; the start day is excluded. Reverse dates give a negative result.
Example
2026-09-30 to 2026-10-07 is 7 days.