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Converting between 12 hour and 24 hour time - Printable Mathematics Worksheets - Wayground

Converting between 12 hour and 24 hour time

22 questions

KG - Kindergarten

Mathematics

Converting between 12 hour and 24 hour time is a free printable mathematics worksheet for kindergarten students. It contains 22 multiple-choice questions that ask learners to convert times such as 8:40 a.m., 3:30 p.m., and midnight into 24-hour notation, including the use of leading zeros and the special value 00:00. Several questions also reverse the process by converting 24-hour times into 12-hour times with a.m. or p.m. The worksheet gives students repeated practice identifying whether a time falls before or after midday, preserving the correct minutes, and selecting the matching time from plausible answer choices. Use it for guided practice, independent review, or a quick check of early time-conversion skills. A complete answer key is included, and the worksheet is available as a free printable PDF for classroom or home use.

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Worksheets

Converting between 12 hour and 24 hour time

Total questions: 22

Name
Class
Date
1.

Change the following 12 hour clock time to 24 hour clock time.


8.40am

a)

08:40

b)

18:40

c)

20:40

2.

Change the following 12 hour clock time to 24 hour clock time.


3.55am

a)

3:55

b)

03:55

c)

15:55

3.

Change the following 12 hour clock time to 24 hour clock time.


5.00am

a)

5:00

b)

5:0

c)

05:00

d)

17:00

4.

Change the following 12 hour clock time to 24 hour clock time.


3.30pm

a)

03:30

b)

15:00

c)

15:30

5.

Change the following 12 hour clock time to 24 hour clock time.


2.15pm

a)

14:15

b)

02:15

c)

14:00

6.

Change the following 12 hour clock time to 24 hour clock time.


8.00pm

a)

08:00

b)

21:00

c)

20:00

7.

Change the following 12 hour clock time to 24 hour clock time.


10.20pm

a)

21:20

b)

22:20

c)

10:20

8.

Change the following 12 hour clock time to 24 hour clock time.


12.20am

a)

00:20

b)

12:20

9.

Change the following 12 hour clock time to 24 hour clock time.


2.01pm

a)

02:01

b)

2:01

c)

14:01

d)

14:00

10.

Change the following 12 hour clock time to 24 hour clock time.


7.55am

a)

19:55

b)

7:55

c)

07:55

11.

Change the following 12 hour clock time to 24 hour clock time.


10:58pm

a)

22:58

b)

21:58

c)

10:58

12.

Change the following 12 hour clock time to 24 hour clock time.


Midnight

a)

12:00

b)

00:00

13.

Change the following 24 hour clock time to 12 hour clock time (remember am and pm).


03:30

a)

3.30am

b)

15:00

c)

3:30pm

14.

Change the following 24 hour clock time to 12 hour clock time (remember am and pm).


11:50

a)

23:50

b)

11:50pm

c)

11.50am

15.

Change the following 24 hour clock time to 12 hour clock time (remember am and pm).


22:35

a)

10.35pm

b)

10.35am

c)

11.35am

d)

11.35pm

16.

Change the following 24 hour clock time to 12 hour clock time (remember am and pm).


16:25

a)

4.25pm

b)

4.25am

c)

6.25am

d)

6.25pm

17.

Change the following 24 hour clock time to 12 hour clock time (remember am and pm).


19:40

a)

9.40pm

b)

9.40am

c)

7.40am

d)

7.40pm

18.

Change the following 24 hour clock time to 12 hour clock time (remember am and pm).


23:25

a)

11.25pm

b)

11.25am

c)

12.25

19.

Change the following 24 hour clock time to 12 hour clock time (remember am and pm).


11:35

a)

11.35pm

b)

23:35

c)

11.35am

20.

Change the following 24 hour clock time to 12 hour clock time (remember am and pm).


04:45

a)

16:45

b)

4.45am

c)

4.45pm

21.

Change the following 24 hour clock time to 12 hour clock time (remember am and pm).


23:48

a)

midnight

b)

12.48pm

c)

11.48am

d)

11.48pm

22.

Change the following 24 hour clock time to 12 hour clock time (remember am and pm).


18:46

a)

8.46pm

b)

6.46pm

c)

6.46am

Answer Key

Converting between 12 hour and 24 hour time

Total questions: 22

1.
a)

08:40

2.
b)

03:55

3.
c)

05:00

4.
c)

15:30

5.
a)

14:15

6.
c)

20:00

7.
b)

22:20

8.
a)

00:20

9.
c)

14:01

10.
c)

07:55

11.
a)

22:58

12.
b)

00:00

13.
a)

3.30am

14.
c)

11.50am

15.
a)

10.35pm

16.
a)

4.25pm

17.
d)

7.40pm

18.
a)

11.25pm

19.
c)

11.35am

20.
b)

4.45am

21.
d)

11.48pm

22.
b)

6.46pm

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FAQs

What does this worksheet cover, and how does it help students learn to convert between 12-hour and 24-hour time?

This kindergarten mathematics worksheet uses 22 multiple-choice questions to practise converting in both directions between 12-hour and 24-hour time. Students select correct forms such as 8:40 a.m. → 08:40, 3:30 p.m. → 15:30, 12:20 a.m. → 00:20, and 03:30 → 3:30 a.m. The varied items reinforce a.m./p.m. meaning, leading zeros, accurate minutes, and the special representation of midnight as 00:00.

How can I use this worksheet to teach converting between 12-hour and 24-hour time?

Begin by modelling one morning example, such as 8:40 a.m. → 08:40, and one afternoon example, such as 3:30 p.m. → 15:30. Ask students what changes and what stays the same, then discuss why midnight is written as 00:00. After guided examples, have students complete the multiple-choice items and explain why the selected option includes the correct hour, minutes, and a.m./p.m. meaning.

What mistakes should I watch for when students complete this time-conversion worksheet?

Watch for students choosing 03:30 for 3:30 p.m. because they overlook p.m., or writing 10:20 instead of 22:20 for 10:20 p.m. Students may also omit leading zeros in answers such as 05:00 and 07:55, change the minutes while changing the hour, or confuse midnight with 12:00 instead of 00:00. When students work in the reverse direction, check that 24-hour times such as 22:35 are labelled 10:35 p.m., not a.m.

How do I assign and grade this worksheet?

This time-conversion worksheet is available as a printable PDF and as a digital quiz on Wayground, with a complete answer key for all 22 multiple-choice questions. Assign the digital version for online responses, or print the PDF for paper practice; printable submissions can be graded by scanning student work with the Wayground for Teachers app. The printable option can also support schools that are reducing screen time.

How can I differentiate this 12-hour and 24-hour time worksheet for my students?

Use the worksheet’s Advanced Settings to adjust font spacing or increase the font size so the multiple-choice times and answer options are easier to read. You can also apply a dyslexia-friendly font or translate the worksheet into another language when that better supports students working with the time-conversion vocabulary.

Where can I find more free worksheets like this on Wayground?

Wayground offers a comprehensive collection of free printable worksheets and practice problems across all subjects, with downloadable PDFs and answer keys to help students master essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.

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