Name Period
CONVERTING 12- TO 24-HOUR CLOCK TIMES SHEET 1
The 24-hour clock does not have am and pm times.
To change an am time to a 24-hour time, you don’t need to do anything unless it is
12am in which case the hour changes to 00. Add a zero before a single digit hour.
To change a pm time to a 24-hour time, just add 12 to the hour, unless it is 12pm.
If the hour is 12pm then it does not change.
Convert these times into 24 hour clock times.
12 hour
24 hour
12 hour
24 hour
4:25am
4:25pm
9:20am
9:20pm
2:55am
2:55pm
11:35am
11:35pm
1:07am
1:07pm
12:42am
12:42pm
6:13am
6:13pm
Examples
9:05am is 09:05 9:05pm is 21:05
7:27am is 07:27 7:27pm is 19:27
12:10am is 00:10 12:10pm is 12:10
1:00pm becomes 13:00 in 24 hour time.
04:25
16:25
09:20
21:20
02:55
14:55
11:35
23:35
01:07
13:07
00:42
12:42
06:13
18:13
Lily D
3
