Date & Time Difference Calculator
Key Features of Our Date & Time Calculator
Calculate precise time durations between any two dates and times. Our free calculator shows results in years, months, days, hours, and minutes - perfect for project planning, age calculation, work hour tracking, and more.
- Multiple Unit Display - Results shown in years, months, days, hours, and minutes
- Precision Timing - Calculate down to the exact minute between two timestamps
- Future Date Projection - Add/subtract time from a date to find future/past dates
- Workday Calculation - Option to exclude weekends from duration calculations
- Time Zone Aware - Works with your local time zone settings
- Mobile-Friendly - Use anywhere on any device
How to Use the Date & Time Calculator
Enter Start Date/Time
Select the beginning date and time using the datetime picker or type in YYYY-MM-DD HH:MM format.
Enter End Date/Time
Select the ending date and time. The calculator automatically shows the current time by default.
Calculate Duration
Click "Calculate Difference" to see the exact time duration between the two dates.
Reverse Calculation
Switch the dates to see the duration in the opposite direction (past/future).
Date & Time Calculator FAQs
How accurate is the date difference calculation?
Our calculator is precise down to the minute, accounting for varying month lengths and leap years. It provides the most accurate duration possible between two timestamps.
Can I calculate workdays only (excluding weekends)?
Yes! Enable the "Business Days" option to exclude Saturdays and Sundays from your duration calculations.
Does the calculator account for daylight saving time?
The calculator uses your browser's local time zone settings, which automatically account for daylight saving time changes in your region.
How far in the past or future can I calculate?
You can calculate dates from January 1, 1000 to December 31, 9999 - covering nearly all practical needs for historical or future date calculations.