Free time duration calculator to add or subtract hours, minutes, and seconds. Calculate elapsed time and time differences easily.
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Need to add up work hours, calculate total event time, or find the difference between two durations? Our time duration calculator handles the complex math of hours, minutes, and seconds for you.
Time arithmetic is tricky because it uses base 60 (60 seconds in a minute, 60 minutes in an hour). Adding 45 minutes to 1:30 requires carrying over to hours. Our calculator handles these conversions automatically, giving results in hours, minutes, and seconds.
Time Conversion
1 hour = 60 minutes = 3600 secondsAutomatically converts seconds to minutes to hours.
Add multiple durations at once.
Work in hours, minutes, or seconds.
Add times from different physical activities.
Calculate total time spent on tasks.
Add segments of a long trip.
Calculate total duration of videos or audio.
Yes, you can enter multiple durations separated by lines and the calculator will add them all together.