Add Times Calculator

One duration per line, or separated by commas. Write 1:23:45 for hours:minutes:seconds, 90m or 1.5h for a single unit, or 1h 30m for a mixture. A two-part "3:45" is read using the setting below.
Accepts 09:00, 9:00 am or 09:00:30.
Give both dates for spans longer than a day.
Duration in hours
4.2500 h
Time Duration Calculator
Duration in minutes
255.00 min
Duration in seconds
15,300 s
Whole days
0 d
Hours part
4 h
Minutes part
15 min
Seconds part
0 s
Duration as h:mm
4:15
Duration as h:mm:ss
4:15:00
Duration in words
4 hours 15 minutes
Hours after the break
4.2500 h
Break deducted
0 min
Resulting time (24 h)
13:15:00
Resulting time (12 h)
1:15 PM
Days rolled over
0 d
Crosses midnight
no
Durations in the list
2
Average duration
2.1250 h
Duration before splitting or rescaling
4.2500 h
Worked out from ISO 8601-1:2019, Date and time - Representations for information interchange, clauses 5.3 and 5.5 and 2 other sources.

How this is worked out

2 steps
  1. Total of 2 duration(s): 1:30:00 + 2:45:00 = 4:15:00.
  2. 255 minutes total = 4.25 hours (60 s = 1 min, 60 min = 1 h).
Each durationtable
indexclockminuteshours
11:30:00901.5
22:45:001652.75

Results are general information, not financial, tax, legal, medical or engineering advice.