Add Time Calculator

Add multiple time durations in hours, minutes, and seconds. Enter as many time values as you need - up to 10 - and get the total duration instantly.

How to Add Time Values

Convert each time to total seconds, sum them all, then convert back to HH:MM:SS.

• Example: 1:30:00 + 2:45:00 = 4:15:00

• Example: 8:00:00 + 0:45:00 + 0:15:00 = 9:00:00

Results can exceed 24 hours (e.g. a weekly work log of 52:30:00).