Time Calculator
Add or subtract time from a date. Calculate time durations and intervals. Perfect for planning schedules, shifts, and deadlines.
Time Calculation Uses
Calculating time is essential for many daily tasks. This calculator simplifies adding and subtracting hours, minutes, and seconds.
- Scheduling: "If I start a 2-hour 45-minute movie at 8:15 PM, when will it end?"
- Timesheets: Adding up work hours from multiple days (e.g., 8h 30m + 7h 45m).
- Cooking: Calculating when to put a turkey in the oven if it needs 4 hours 20 minutes and dinner is at 6:00 PM.
How it works
The calculator converts all inputs into the smallest unit (usually seconds or milliseconds), performs the arithmetic, and then converts the result back into a human-readable format (Days, Hours, Minutes, Seconds).
? Frequently Asked Questions
Yes! In 'Add/Subtract Time' mode, if you add 25 hours to today, the result will correctly show tomorrow's date.
Yes, in Duration Mode, the result will show a negative value (e.g., 2h - 3h = -1h).
For calculation purposes, a day is exactly 24 hours. This calculator does not account for Daylight Saving Time shifts or Leap Seconds automatically.