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Welcome to the Math Salamanders 24 Hour Clock Conversion Worksheets.

Here you find our selection of 24 hour time math worksheets to help your child learn
to convert times between the 12 and 24 hour clock.

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The 24 Hour Clock

In the 24 hour clock, there are no 'am' and 'pm' labels.

The hours start at zero and go throught to 23.

All 24 hour clock times should be written hh:mm or hh:mm:ss, where h is the hour, m is the minute and s is the seconds.

Sometimes the colons are omitted bewteen the hours and minutes.

Converting 24 Hour Times

Converting from 24 hour times to 12 hour times

The following simple steps will help you change a 24 hour time to a 12 hour time with 'am' and 'pm'.

- If the hour is exactly 12, then simply label it as a pm time.
- If the hour is 00, then change it to 12 and label it as an am time.
- If the hour is greater than 12, then simply subtract 12 from the hour and label it as a pm time.
- Otherwise, simply label it as an am time and take away any leading zeros.

The minutes and seconds never change when changing between 24 hour and 12 hour times.

Examples

14:36 = 2:36pm 02:12 = 2:12am

09:24 = 9:24am 17:48 = 5:48pm

00:45 = 12:45am 12:15 = 12:15pm

20:36 = 8:36pm 23:56 = 11:56pm

Converting from 12 hour times to 24 hour clock

The following simple steps will help you change a 12 hour time to a 24 hour time.

- If the hour is exactly 12pm, then simply remove the 'pm' label.
- If the hour is 12am, then change it to 00.
- If the hour is a pm time, then simply add 12 to the hour.
- Otherwise, the hour does not change. If it is less than 10, then add a zero before the digit.

The minutes and seconds never change when changing between 24 hour and 12 hour times.

Examples

1:45am = 01:45 1:45pm = 13:45

4:20am = 04:20 4:20pm = 16:20

11:32am = 11:32 11:32pm = 23:32

12:07am = 00:07 12:07pm = 12:07

24 Clock Conversion Worksheets

These sheets have been split into 3 sections.

The first set of sheets involve converting am and pm times into 24 clock times.

The second set of sheets involve converting 24 hour clock times to 12 hour standard time.

The last set of sheets involve both converting between 12 and 24 hour times and back.

Using these sheets will help your child to:

- convert 12 hour standard times to 24 hour clock times;
- convert 24 hour clock times to 12 hour standard times;
- read from an analogue accurately at 5 minute intervals;
- draw clock hands in the correct place for 5 minute intervals.

All the free 24 Hour Clock Conversion sheets in this section support Elementary Math Benchmarks.

Convering 12 Hour Standard Time to 24 Hour Clock Worksheets

Convering 24 Hour Clock to 12 Hour Standard Time

24 Hour Clock Conversion Sheets

Time Puzzles - harder

Here you will find our selection of harder time puzzles.

The sheets in this section involve telling the time accurately to 1 minute intervals.

The sheets also include converting 24 hour to 12 hour clock and back.

Each time problem consists of some clues and 8 possible answers, of which only one is correct.

24 Hour Military Time Converter

On this page, you will find our military time converter for converting time to and from 24 hour clock.

The converter will convert standard 12 hour times to 24 hour time and also convert 24 hour time to 12 hour standard time.

Need Help Learning to Tell the Time?

Here you will find our selection of telling time clock worksheets to help your child learn their o'clock, half-past, quarter past and to.

Using these sheets will help your child to:

- read o'clock, half-past times;
- read quarter past and quarter to;
- tell the time to the nearest minute;
- convert analogue times to digital;

The sheets in this section are a great way of starting your child off with learning to tell the time.

We hope you have found our 24 Hour Clock Conversion Sheets useful...please feel free to give us feedback below.

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