Time Difference Calculator
Calculate the exact duration between two dates and times. Perfect for shift duration, event length, or time tracking.
How it works: Enter start and end dates/times to get the precise duration. Automatically handles overnight periods and multi-day spans.
About the Time Difference Calculator
This calculator helps you determine the exact duration between two points in time. Whether you're calculating shift lengths, event durations, or tracking time across days, this tool provides accurate results in multiple formats.
Key Features
- Date & Time Support: Calculate differences across multiple days
- Midnight Crossing: Automatically handles overnight periods
- Multiple Formats: View results in hours, minutes, days, and friendly descriptions
- Quick Presets: Set to today's shift or start from current time
- Optional Rounding: Round to common increments for payroll systems
Common Use Cases
Shift Duration
Calculate exact shift length including overnight periods
Mon 11:00 PM to Tue 7:00 AM = 8 hours
Event Length
Determine total duration of meetings or events
9:00 AM to 2:30 PM = 5h 30m
Multi-Day Projects
Calculate time spans across multiple days
Mon 9:00 AM to Wed 5:00 PM = 2 days, 8h
Time Tracking
Track elapsed time from a start point
Use "From Now" button to start timing
How to Use
- Enter your start date and time
- Enter your end date and time
- Optionally enable rounding for payroll compliance
- Click "Calculate Difference" to see the duration
- View results in hours, minutes, or days as needed
Tips
- Use the quick presets for common scenarios (today's shift, from now)
- The calculator automatically handles overnight shifts
- Enable rounding to match your payroll system requirements
- Results show if the period crosses midnight for easy verification