Introduction
If you want to do calculations based on cells containing times you need to use the TIME and TIMEVALUE functions.
Add 1 hour to time
You can’t simply use =A1+1 to add an hour to a time stored in A1, you need to define which part of the time value – hh:mm:ss – you want to add one to. You must define the value as TIME then use hh,mm,ss options for the value to add
|
A |
B |
| 1 |
04:00 |
05:00 |
=A1+TIME(1,0,0)
|
| 2 |
04:00 |
04:30 |
=A2+TIME(0,30,0)
|
Show a time range using a cells time as starting point
Use CONCATENATE or & to add free text (“~”) between the time from an existing cell and existing cell +3 hours
|
A |
B |
| 1 |
04:00 |
04:00~07:00 |
=CONCATENATE(TEXT(A1,”hh:mm”),”~”,TEXT(A1+TIME(3,0,0),”hh:mm”))
|
| 2 |
04:00 |
04:00~07:00 |
=TEXT(A2,”hh:mm”)&”~”&TEXT(A2+TIME(3,0,0),”hh:mm”)
|
If time in cell is less than defined time minus one day
If you want to use time from a reference cell in a function you have to use TIMEVALUE
e.g. if time in column A cell is less than 01:00, take date from column B cell and -1 day, else leave same value as column B cell
|
A |
B |
C |
| 1 |
12:30 AM |
10/06/2016 |
09/06/2016 |
=IF(A1>=TIMEVALUE(“01:00 AM”),B1,B1-1)
|
| 2 |
02:00 AM |
10/06/2016 |
10/06/2016 |
=IF(A2>=TIMEVALUE(“01:00 AM”),B2,B2-1)
|
| 3 |
01:00 AM |
10/06/2016 |
10/06/2016 |
=IF(A3>=TIMEVALUE(“01:00 AM”),B3,B3-1)
|
Also see
Day out in London with Intelliflo - bit hot though!