A time calculator adds or subtracts two time durations in hours, minutes, and seconds.
About this calculator
A time calculator adds or subtracts two time durations in hours, minutes, and seconds. It is useful for totaling work hours, calculating elapsed time in projects, logging workout durations, or computing time differences.
Time arithmetic is non-decimal, 60 seconds per minute and 60 minutes per hour, so it is easy to make mistakes by hand. It handles the carrying and borrowing for you.
Common uses
- Add up total hours worked across multiple work sessions
- Calculate the total time of a workout with multiple activities
- Find the elapsed time between two timestamps
- Sum audio or video durations for a playlist
Frequently asked questions
How do you add hours and minutes?
Add minutes first. If the sum exceeds 59, carry over 1 hour for every 60 minutes. Then add the hours. For example: 2h 45m + 1h 30m = 3h 75m = 4h 15m (since 75 minutes = 1 hour and 15 minutes).