How to Use the Time Calculator
- Choose a mode: Add, Subtract, or Difference.
- Enter Time A and Time B in
HH:MM:SSorMM:SSformat. - Click Calculate to see the result.
Mode Explanations
Add — Adds Time B to Time A. Useful for totalling durations, e.g. adding up work sessions or video lengths.
Subtract — Subtracts Time B from Time A. Useful for finding elapsed time or remaining duration. Result can be negative.
Difference — Returns the absolute difference between two times. Always positive — useful when you only need how far apart two durations are.
Common Use Cases
- Adding up video or audio durations for a playlist
- Calculating total work time from start and end timestamps
- Finding how much time is left in a schedule
- Comparing lap times in sports
- Calculating overtime or shift durations
Frequently Asked Questions
What formats are supported?
Enter times as HH:MM:SS (e.g. 01:30:00) or MM:SS (e.g. 90:00). Hours can exceed 24.
Can the result be negative?
Yes, in Subtract mode. A negative result means Time B is larger than Time A. The Difference mode always returns a positive value.