Time & moneyAges 13-15

12-hour & 24-hour clock

Convert afternoon and evening 12-hour times into standard 24-hour clock notation. Review suitability for your learners before teaching.

New variation Try interactive challenge Browse templates

Age band:Ages 10-12 Ages 13-15

Choose “Save as PDF” to keep a copy. Use your browser’s paper setting for A4 or Letter.

Worksheet StudioPractice pack · Ages 13-15

12-hour & 24-hour clock

Take your time. Show your thinking.

1. Write 7:55 pm in 24-hour clock format.
7 · 55 · 24 · 12-hour & 24-hour clock
2. Write 10:55 pm in 24-hour clock format.
10 · 55 · 24 · 12-hour & 24-hour clock
3. Write 4:55 pm in 24-hour clock format.
4 · 55 · 24 · 12-hour & 24-hour clock
4. Write 11:25 pm in 24-hour clock format.
11 · 25 · 24 · 12-hour & 24-hour clock
5. Write 10:40 pm in 24-hour clock format.
10 · 40 · 24 · 12-hour & 24-hour clock
6. Write 9:15 pm in 24-hour clock format.
9 · 15 · 24 · 12-hour & 24-hour clock
7. Write 9:00 pm in 24-hour clock format.
9 · 00 · 24 · 12-hour & 24-hour clock
8. Write 7:25 pm in 24-hour clock format.
7 · 25 · 24 · 12-hour & 24-hour clock
9. Write 7:00 pm in 24-hour clock format.
7 · 00 · 24 · 12-hour & 24-hour clock
10. Write 1:20 pm in 24-hour clock format.
1 · 20 · 24 · 12-hour & 24-hour clock
11. Write 9:05 pm in 24-hour clock format.
9 · 05 · 24 · 12-hour & 24-hour clock
12. Write 11:45 pm in 24-hour clock format.
11 · 45 · 24 · 12-hour & 24-hour clock

12 questions · Seed 104734 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 13-15

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. Write 7:55 pm in 24-hour clock format.
19:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:55.
2. Write 10:55 pm in 24-hour clock format.
22:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:55.
3. Write 4:55 pm in 24-hour clock format.
16:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:55.
4. Write 11:25 pm in 24-hour clock format.
23:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 11 + 12 = 23, giving 23:25.
5. Write 10:40 pm in 24-hour clock format.
22:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:40.
6. Write 9:15 pm in 24-hour clock format.
21:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:15.
7. Write 9:00 pm in 24-hour clock format.
21:00
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:00.
8. Write 7:25 pm in 24-hour clock format.
19:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:25.
9. Write 7:00 pm in 24-hour clock format.
19:00
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:00.
10. Write 1:20 pm in 24-hour clock format.
13:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:20.
11. Write 9:05 pm in 24-hour clock format.
21:05
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:05.
12. Write 11:45 pm in 24-hour clock format.
23:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 11 + 12 = 23, giving 23:45.

12 questions · Seed 104734 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

12-hour & 24-hour clock

Take your time. Show your thinking.

1. Write 7:55 pm in 24-hour clock format.
7 · 55 · 24 · 12-hour & 24-hour clock
2. Write 10:55 pm in 24-hour clock format.
10 · 55 · 24 · 12-hour & 24-hour clock
3. Write 4:55 pm in 24-hour clock format.
4 · 55 · 24 · 12-hour & 24-hour clock
4. Write 11:25 pm in 24-hour clock format.
11 · 25 · 24 · 12-hour & 24-hour clock
5. Write 10:40 pm in 24-hour clock format.
10 · 40 · 24 · 12-hour & 24-hour clock
6. Write 9:15 pm in 24-hour clock format.
9 · 15 · 24 · 12-hour & 24-hour clock
7. Write 9:00 pm in 24-hour clock format.
9 · 00 · 24 · 12-hour & 24-hour clock
8. Write 7:25 pm in 24-hour clock format.
7 · 25 · 24 · 12-hour & 24-hour clock
9. Write 7:00 pm in 24-hour clock format.
7 · 00 · 24 · 12-hour & 24-hour clock
10. Write 1:20 pm in 24-hour clock format.
1 · 20 · 24 · 12-hour & 24-hour clock
11. Write 9:05 pm in 24-hour clock format.
9 · 05 · 24 · 12-hour & 24-hour clock
12. Write 11:45 pm in 24-hour clock format.
11 · 45 · 24 · 12-hour & 24-hour clock

12 questions · Seed 104734 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. Write 7:55 pm in 24-hour clock format.
19:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:55.
2. Write 10:55 pm in 24-hour clock format.
22:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:55.
3. Write 4:55 pm in 24-hour clock format.
16:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:55.
4. Write 11:25 pm in 24-hour clock format.
23:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 11 + 12 = 23, giving 23:25.
5. Write 10:40 pm in 24-hour clock format.
22:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:40.
6. Write 9:15 pm in 24-hour clock format.
21:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:15.
7. Write 9:00 pm in 24-hour clock format.
21:00
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:00.
8. Write 7:25 pm in 24-hour clock format.
19:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:25.
9. Write 7:00 pm in 24-hour clock format.
19:00
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:00.
10. Write 1:20 pm in 24-hour clock format.
13:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:20.
11. Write 9:05 pm in 24-hour clock format.
21:05
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:05.
12. Write 11:45 pm in 24-hour clock format.
23:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 11 + 12 = 23, giving 23:45.

12 questions · Seed 104734 · Age guidance, not curriculum certification