About This Calculator
This Time Duration Calculator allows you to calculate the total time between a start and end time, with an optional break deduction. It's ideal for tracking work hours, shift durations, or any custom time spans. The calculator supports same-day or overnight time ranges and outputs both formatted and decimal-hour results.
How to Use
- Enter the start and end time using the time input fields.
- Optionally enter a break time in minutes to be subtracted.
- You can click the "Now" button next to each time input to auto-fill the current system time.
- Click "Calculate" to see:
- Raw Duration (total time without deductions)
- Net Duration (after subtracting break time)
- Net Duration in Decimal format
Frequently Asked Questions
Can I calculate hours across midnight?
Yes, the calculator handles overnight ranges correctly. If the end time is earlier than the start time, it's treated as the next day.
What format are the results displayed in?
Results are shown in both "X hours Y minutes" and decimal format (e.g., 7.75 hours).
Is the break time required?
No, the break time field is optional. If left blank, it's treated as 0 minutes.
What time format is supported?
Input values are always processed in 24-hour format internally. Depending on your browser or device settings, the time picker may appear in 12-hour (AM/PM) or 24-hour format.