Date Difference
Compare two dates in whole days, weeks, months, or years.
About this tool
The Date Difference Calculator finds the exact number of days, weeks, months, and years between any two dates. It's useful for project deadlines, contract durations, age calculations, and countdown planning.
How it works
- Enter the start date using the date picker.
- Enter the end date.
- The difference is displayed instantly in days, weeks, months, and years.
Example use cases
- Project timeline: Find how many working days remain between today and a project deadline to plan your remaining workload.
- Lease duration: Calculate the exact number of months between a lease start date and an end date to verify a 12-month term.
Frequently asked questions
Does it account for leap years?
Yes - the calculator correctly handles February 29 in leap years when calculating differences that cross a leap day.
Can I calculate business days only (excluding weekends)?
The current tool calculates calendar days. For business-day calculations, subtract approximately 2/7 of the total days as a rough estimate.