Time Calculator — Add Hours & Minutes
Add or subtract hours, minutes and seconds, find the time between two clock times and total a list of durations, also as decimal hours.
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How to use
Everything you enter is processed only in this browser.
Choose add or subtract times, between two times, time ± duration, or sum of lines
Enter values like 1:30:00, 90 min or 1h 30m
Check the result in H:MM:SS and decimal hours, and copy it
How it works and good to know
Durations accept h:mm:ss, h:mm (or read as m:ss if you choose), 1 hour 20 min 5 s, 1h 20m and 2.5 hours; plain numbers are read as minutes. Between two times, an end earlier than the start counts as the next day, past midnight. Sum of lines takes up to 500 lines, reads only the duration at the end of each line, and subtracts lines starting with -. Results are rounded to the second, up to 9,999 hours. For date differences use the Date, D-Day & Anniversary Calculator, and for work hours the Hourly Pay & Work Hours (Korea) tool.