Time Calculator
Add or subtract hours, minutes, and seconds from any time. Calculate time durations and result times instantly.
Result Time
Start: -
Duration: -
Result: -
How to use the Time Calculator
- Enter the start time.
- Enter the hours, minutes and seconds to add or subtract.
- Choose Add or Subtract.
- Click Calculate to see the resulting time.
Formula used
Worked example
Examples
09:30 + 7 h 45 min = 17:15 (5:15 PM)
22:00 + 5 h = 03:00 next day
14:20 − 2 h 50 min = 11:30
Useful for shifts, travel and cooking
Work out when a train arrives after a long journey, when a shift ends after breaks, or when to take food out of the oven. For the total duration between two clock times with breaks deducted, use the work hours calculator; for date-based gaps, use the date calculator.
Tips for accurate results
- 24-hour format avoids AM/PM confusion.
- 60 minutes = 1 hour; 3,600 seconds = 1 hour.
- Results after midnight belong to the next day.
Frequently Asked Questions
Add the hours and minutes, carrying over each 60 minutes into an hour.
86,400.
Yes, it wraps around to the next day.
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Content reviewed by Vinod, Easy Smart Calculator · Last updated October 2026
How This Calculator Works
Enter your start time and the duration (hours, minutes, seconds) you want to add or subtract. The calculator shows the result time and total seconds.
Use Cases
- Work Shifts: Calculate shift end times
- Meeting Duration: Plan meeting end times
- Task Timing: Track time spent on tasks
- Travel Planning: Calculate arrival times
- Cooking: Add preparation time to start time