Time Duration Calculator
Calculate the time difference between two times, add/subtract hours and minutes from a specific time, or sum multiple durations. Perfect for work logs, flight durations, and scheduling.
This Tool Has Moved
Time Duration Calculator has been upgraded and merged into the Date Calculator suite. You can now find all Time features (Diff, Add/Sub, Sum, Work Hours) as dedicated tabs within Date Calculator.
Go to Date CalculatorCalculate the time difference between two times, add/subtract hours and minutes from a specific time, or sum multiple durations. Perfect for work logs, flight durations, and scheduling.
How to Use This Time Duration Calculator
- 1Select 'Time Difference' to find the duration between two times.
- 2Select 'Add / Subtract' to calculate a future or past time.
- 3Select 'Time Sum' to add multiple durations together.
- 4Enter the hours and minutes using the inputs or time picker.
- 5View the result instantly in both 12-hour and 24-hour formats.
- 6Copy the result for your records.
Features
- ✓Calculate duration between two time points (e.g., 9:00 AM to 5:00 PM)
- ✓Add duration to a time (e.g., 10:00 AM + 2h 30m)
- ✓Subtract duration from a time
- ✓Sum multiple durations (e.g. 1h 30m + 45m + 2h)
- ✓Supports 12-hour and 24-hour formats
- ✓Handles overnight calculations (crossing midnight)
- ✓Instant results
- ✓Shareable URLs
- ✓History of recent calculations
About Time Calculation
Calculating time differences can be tricky due to the base-60 system (60 minutes in an hour) and the 12/24-hour cycles. This tool simplifies the math, ensuring you get accurate durations or future timestamps without manual conversion errors. It's especially useful for payroll, travel planning, and shift management.