FREE ONLINE DATE & TIME TOOL
Date Difference Calculator
Count the number of days between two calendar dates.
Worked example
From 1 March to 11 March is a difference of 10 elapsed days. If you need to count both the start and end dates inclusively, the count may instead be 11 calendar dates.
Assumptions to check
Clarify whether your task needs elapsed days, inclusive calendar days, business days or a time-zone-aware duration.
Important limitation
The result counts the difference between dates. Whether both endpoint dates should be counted depends on the convention used for your particular task.
Quick question
Are both dates included?
The result is the difference between the dates. Whether to count both endpoints depends on the convention of your task.