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 7:25 pm in 24-hour clock format.
7 · 25 · 24 · 12-hour & 24-hour clock
2. Write 4:10 pm in 24-hour clock format.
4 · 10 · 24 · 12-hour & 24-hour clock
3. Write 7:50 pm in 24-hour clock format.
7 · 50 · 24 · 12-hour & 24-hour clock
4. Write 8:45 pm in 24-hour clock format.
8 · 45 · 24 · 12-hour & 24-hour clock
5. Write 8:15 pm in 24-hour clock format.
8 · 15 · 24 · 12-hour & 24-hour clock
6. Write 4:20 pm in 24-hour clock format.
4 · 20 · 24 · 12-hour & 24-hour clock
7. Write 5:15 pm in 24-hour clock format.
5 · 15 · 24 · 12-hour & 24-hour clock
8. Write 2:25 pm in 24-hour clock format.
2 · 25 · 24 · 12-hour & 24-hour clock
9. Write 10:40 pm in 24-hour clock format.
10 · 40 · 24 · 12-hour & 24-hour clock
10. Write 4:50 pm in 24-hour clock format.
4 · 50 · 24 · 12-hour & 24-hour clock
11. Write 3:50 pm in 24-hour clock format.
3 · 50 · 24 · 12-hour & 24-hour clock
12. Write 6:35 pm in 24-hour clock format.
6 · 35 · 24 · 12-hour & 24-hour clock

12 questions · Seed 56 · 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 7:25 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.
2. Write 4:10 pm in 24-hour clock format.
16:10
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:10.
3. Write 7:50 pm in 24-hour clock format.
19:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:50.
4. Write 8:45 pm in 24-hour clock format.
20:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:45.
5. Write 8:15 pm in 24-hour clock format.
20:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:15.
6. Write 4:20 pm in 24-hour clock format.
16:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:20.
7. Write 5:15 pm in 24-hour clock format.
17:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:15.
8. Write 2:25 pm in 24-hour clock format.
14:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 2 + 12 = 14, giving 14:25.
9. 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.
10. Write 4:50 pm in 24-hour clock format.
16:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:50.
11. Write 3:50 pm in 24-hour clock format.
15:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:50.
12. Write 6:35 pm in 24-hour clock format.
18:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:35.

12 questions · Seed 56 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

12-hour & 24-hour clock

Take your time. Show your thinking.

1. Write 7:25 pm in 24-hour clock format.
7 · 25 · 24 · 12-hour & 24-hour clock
2. Write 4:10 pm in 24-hour clock format.
4 · 10 · 24 · 12-hour & 24-hour clock
3. Write 7:50 pm in 24-hour clock format.
7 · 50 · 24 · 12-hour & 24-hour clock
4. Write 8:45 pm in 24-hour clock format.
8 · 45 · 24 · 12-hour & 24-hour clock
5. Write 8:15 pm in 24-hour clock format.
8 · 15 · 24 · 12-hour & 24-hour clock
6. Write 4:20 pm in 24-hour clock format.
4 · 20 · 24 · 12-hour & 24-hour clock
7. Write 5:15 pm in 24-hour clock format.
5 · 15 · 24 · 12-hour & 24-hour clock
8. Write 2:25 pm in 24-hour clock format.
2 · 25 · 24 · 12-hour & 24-hour clock
9. Write 10:40 pm in 24-hour clock format.
10 · 40 · 24 · 12-hour & 24-hour clock
10. Write 4:50 pm in 24-hour clock format.
4 · 50 · 24 · 12-hour & 24-hour clock
11. Write 3:50 pm in 24-hour clock format.
3 · 50 · 24 · 12-hour & 24-hour clock
12. Write 6:35 pm in 24-hour clock format.
6 · 35 · 24 · 12-hour & 24-hour clock

12 questions · Seed 56 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. Write 7:25 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.
2. Write 4:10 pm in 24-hour clock format.
16:10
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:10.
3. Write 7:50 pm in 24-hour clock format.
19:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:50.
4. Write 8:45 pm in 24-hour clock format.
20:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:45.
5. Write 8:15 pm in 24-hour clock format.
20:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:15.
6. Write 4:20 pm in 24-hour clock format.
16:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:20.
7. Write 5:15 pm in 24-hour clock format.
17:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:15.
8. Write 2:25 pm in 24-hour clock format.
14:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 2 + 12 = 14, giving 14:25.
9. 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.
10. Write 4:50 pm in 24-hour clock format.
16:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:50.
11. Write 3:50 pm in 24-hour clock format.
15:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:50.
12. Write 6:35 pm in 24-hour clock format.
18:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:35.

12 questions · Seed 56 · Age guidance, not curriculum certification