Time & moneyAges 10-12

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 10-12

12-hour & 24-hour clock

Take your time. Show your thinking.

1. Write 6:15 pm in 24-hour clock format.
6 · 15 · 24 · 12-hour & 24-hour clock
2. Write 2:35 pm in 24-hour clock format.
2 · 35 · 24 · 12-hour & 24-hour clock
3. Write 4:40 pm in 24-hour clock format.
4 · 40 · 24 · 12-hour & 24-hour clock
4. Write 3:15 pm in 24-hour clock format.
3 · 15 · 24 · 12-hour & 24-hour clock
5. Write 4:25 pm in 24-hour clock format.
4 · 25 · 24 · 12-hour & 24-hour clock
6. Write 9:05 pm in 24-hour clock format.
9 · 05 · 24 · 12-hour & 24-hour clock
7. Write 11:15 pm in 24-hour clock format.
11 · 15 · 24 · 12-hour & 24-hour clock
8. Write 4:35 pm in 24-hour clock format.
4 · 35 · 24 · 12-hour & 24-hour clock
9. Write 9:55 pm in 24-hour clock format.
9 · 55 · 24 · 12-hour & 24-hour clock
10. Write 5:55 pm in 24-hour clock format.
5 · 55 · 24 · 12-hour & 24-hour clock
11. Write 1:50 pm in 24-hour clock format.
1 · 50 · 24 · 12-hour & 24-hour clock
12. Write 7:20 pm in 24-hour clock format.
7 · 20 · 24 · 12-hour & 24-hour clock

12 questions · Seed 104736 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 10-12

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. Write 6:15 pm in 24-hour clock format.
18:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:15.
2. Write 2:35 pm in 24-hour clock format.
14:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 2 + 12 = 14, giving 14:35.
3. Write 4:40 pm in 24-hour clock format.
16:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:40.
4. Write 3:15 pm in 24-hour clock format.
15:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:15.
5. Write 4:25 pm in 24-hour clock format.
16:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:25.
6. 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.
7. Write 11:15 pm in 24-hour clock format.
23:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 11 + 12 = 23, giving 23:15.
8. Write 4:35 pm in 24-hour clock format.
16:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:35.
9. Write 9:55 pm in 24-hour clock format.
21:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:55.
10. Write 5:55 pm in 24-hour clock format.
17:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:55.
11. Write 1:50 pm in 24-hour clock format.
13:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:50.
12. Write 7:20 pm in 24-hour clock format.
19:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:20.

12 questions · Seed 104736 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 10-12

12-hour & 24-hour clock

Take your time. Show your thinking.

1. Write 6:15 pm in 24-hour clock format.
6 · 15 · 24 · 12-hour & 24-hour clock
2. Write 2:35 pm in 24-hour clock format.
2 · 35 · 24 · 12-hour & 24-hour clock
3. Write 4:40 pm in 24-hour clock format.
4 · 40 · 24 · 12-hour & 24-hour clock
4. Write 3:15 pm in 24-hour clock format.
3 · 15 · 24 · 12-hour & 24-hour clock
5. Write 4:25 pm in 24-hour clock format.
4 · 25 · 24 · 12-hour & 24-hour clock
6. Write 9:05 pm in 24-hour clock format.
9 · 05 · 24 · 12-hour & 24-hour clock
7. Write 11:15 pm in 24-hour clock format.
11 · 15 · 24 · 12-hour & 24-hour clock
8. Write 4:35 pm in 24-hour clock format.
4 · 35 · 24 · 12-hour & 24-hour clock
9. Write 9:55 pm in 24-hour clock format.
9 · 55 · 24 · 12-hour & 24-hour clock
10. Write 5:55 pm in 24-hour clock format.
5 · 55 · 24 · 12-hour & 24-hour clock
11. Write 1:50 pm in 24-hour clock format.
1 · 50 · 24 · 12-hour & 24-hour clock
12. Write 7:20 pm in 24-hour clock format.
7 · 20 · 24 · 12-hour & 24-hour clock

12 questions · Seed 104736 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 10-12

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. Write 6:15 pm in 24-hour clock format.
18:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:15.
2. Write 2:35 pm in 24-hour clock format.
14:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 2 + 12 = 14, giving 14:35.
3. Write 4:40 pm in 24-hour clock format.
16:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:40.
4. Write 3:15 pm in 24-hour clock format.
15:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:15.
5. Write 4:25 pm in 24-hour clock format.
16:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:25.
6. 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.
7. Write 11:15 pm in 24-hour clock format.
23:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 11 + 12 = 23, giving 23:15.
8. Write 4:35 pm in 24-hour clock format.
16:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:35.
9. Write 9:55 pm in 24-hour clock format.
21:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:55.
10. Write 5:55 pm in 24-hour clock format.
17:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:55.
11. Write 1:50 pm in 24-hour clock format.
13:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:50.
12. Write 7:20 pm in 24-hour clock format.
19:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:20.

12 questions · Seed 104736 · Age guidance, not curriculum certification