Date Difference Calculator
Need to know exactly how many days are left until your vacation, or how long ago a specific event happened? Our Date Difference Calculator provides the exact duration between any two points in time with 100% accuracy.
We account for leap years and varying month lengths to ensure you get the precise count every time.
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How to Calculate the Duration Between Dates
- 1
Select the Start Date from the calendar.
- 2
Select the End Date from the calendar.
- 3
Instantly see the results in days, weeks, or a full Y/M/D breakdown.
Tracking Milestones
Inclusive vs. Exclusive Dates
By default, calculators usually find the 'gap' between dates. If you need to include the end date as a full working day, remember to add 1 to the total count.
Working Days vs. Total Days
This tool calculates total calendar days. It's best for general timeline planning and personal milestones.
Frequently Asked Questions
Can I calculate negative differences?
If you set the end date before the start date, the tool will simply calculate the absolute duration between them.
How far back can I go?
You can calculate differences for dates hundreds of years in the past or future.
Why Use This Tool?
- ✓Precise Y/M/D breakdown
- ✓Leap year aware
- ✓Instant, offline-ready logic
- ✓Free and easy to use