Date Difference Calculator
Find the exact duration between two dates in years, months, days, weeks, and hours.
How to date difference calculator
- 1Select the start date using the first date picker.
- 2Select the end date using the second date picker.
- 3Optionally toggle whether to include the end date in the count.
- 4View the difference in years, months, days, total days, total weeks, and total hours.
About This Tool
The date difference calculator computes the exact duration between any two dates. It breaks down the result into years, months, and days, and also provides totals in days, weeks, and hours. This is useful for project planning, tracking durations, calculating age at a specific date, or counting days until an event.
The include/exclude end date toggle lets you choose whether the end date itself should be counted. For example, the difference between January 1 and January 3 is either 2 days (exclusive) or 3 days (inclusive), depending on your needs. All calculations run instantly in your browser.
Frequently Asked Questions
Yes. The calculator uses JavaScript's Date object which correctly handles leap years, so calculations spanning February in a leap year are accurate.
When enabled, the end date itself is counted as a full day. This is useful for scenarios like hotel stays or rental periods where both the start and end dates count.
Yes. The calculator automatically determines which date is earlier and calculates the absolute difference between them.