Convert 12-hour time to 24-hour time with this printable worksheet.

Explanation:
We need to convert times from the 12-hour clock format (with am/pm) to the 24-hour clock format.

Here’s how it works:
- For am times:
- If it’s 12:00 am, that becomes 00:00.
- For any other am time (like 1:30 am, 6:50 am, etc.), just keep the hour as is — but write it with two digits if needed (e.g., 6:50 am → 06:50).
- For pm times:
- If it’s 12:00 pm, that stays 12:00.
- For any other pm time (like 1:30 pm, 4:30 pm, etc.), add 12 to the hour (e.g., 4:30 pm → 4 + 12 = 16 → 16:30).

Let’s go through each one carefully:

1. 4:30 pm → 4 + 12 = 16 → 16:30
2. 6:50 am → stays same, but use 2 digits for hour → 06:50
3. 7:15 pm → 7 + 12 = 19 → 19:15
4. 9:25 am → 09:25
5. 5:55 pm → 5 + 12 = 17 → 17:55
6. 8:20 am → 08:20
7. 3:35 pm → 3 + 12 = 15 → 15:35
8. 2:40 am → 02:40
9. 1:15 am → 01:15
10. 9:00 am → 09:00
11. 7:30 pm → 7 + 12 = 19 → 19:30
12. 4:15 am → 04:15
13. 6:30 pm → 6 + 12 = 18 → 18:30
14. 9:30 am → 09:30
15. 12:55 pm → 12 pm stays 12 → 12:55
16. 10:25 am → 10:25
17. 11:00 pm → 11 + 12 = 23 → 23:00
18. 8:30 am → 08:30
19. 9:50 pm → 9 + 12 = 21 → 21:50
20. 3:30 am → 03:30

Double-check a few tricky ones:
- 12:55 pm → yes, still 12:55 (not 00:55 — that’s midnight).
- 11:00 pm → 23:00 ✔️
- 12:00 am would be 00:00, but we don’t have that here.

All look correct.

Final Answer:
1. 16:30
2. 06:50
3. 19:15
4. 09:25
5. 17:55
6. 08:20
7. 15:35
8. 02:40
9. 01:15
10. 09:00
11. 19:30
12. 04:15
13. 18:30
14. 09:30
15. 12:55
16. 10:25
17. 23:00
18. 08:30
19. 21:50
20. 03:30