Reading 24-hour clock time

Everything You Need in One Place

Homework problems? Exam preparation? Trying to grasp a concept or just brushing up the basics? Our extensive help & practice library have got you covered.

Learn and Practice With Ease

Our proven video lessons ease you through problems quickly, and you get tonnes of friendly practice on questions that trip students up on tests and finals.

Instant and Unlimited Help

Our personalized learning platform enables you to instantly find the exact walkthrough to your specific type of question. Activate unlimited help now!

  1. Introduction to Reading 24-Hour Clock Time:
  2. What is 24-hour clock time?
  3. Equivalent 24-hour times on the analog clock
  4. Comparing 12-hour times and 24-hour times in a table
  5. How to convert between 12-hour clock time (AM/PM) and 24-hour clock time
  1. Converting AM/PM Time into 24-Hour Time
    Write as 24-hour time instead of AM/PM time.
    1. 9:56 AM
    2. 6:18 AM
    3. 1:35 PM
    4. 4:27 PM
    5. 12:01 AM
  2. Converting 24-Hour Time into AM/PM Time
    Write as AM/PM time instead of 24-hour time.
    1. 05:40
    2. 22:23
    3. 18:05
    4. 11:37
    5. 00:51
  3. Noon and Midnight are Special Exceptions for 24-Hour Time
    Answer the questions about special times in the day.
    1. How do you write noon and midnight in AM/PM time?
    2. How do you write noon and midnight in 24-hour time?
    3. What is the rule for all other time conversion (not noon or midnight) for AM and PM hours into 24-hour time?
  4. 24-Hour Time - True False Questions
    Read the descriptions of the time shown below. Write true (T) or false (F) for each description.


    Time: Reading 24-Hour Clock Time
    Free to Join!
    StudyPug is a learning help platform covering math and science from grade 4 all the way to second year university. Our video tutorials, unlimited practice problems, and step-by-step explanations provide you or your child with all the help you need to master concepts. On top of that, it's fun - with achievements, customizable avatars, and awards to keep you motivated.
    • Easily See Your Progress

      We track the progress you've made on a topic so you know what you've done. From the course view you can easily see what topics have what and the progress you've made on them. Fill the rings to completely master that section or mouse over the icon to see more details.
    • Make Use of Our Learning Aids

      Last Viewed
      Practice Accuracy
      Suggested Tasks

      Get quick access to the topic you're currently learning.

      See how well your practice sessions are going over time.

      Stay on track with our daily recommendations.

    • Earn Achievements as You Learn

      Make the most of your time as you use StudyPug to help you achieve your goals. Earn fun little badges the more you watch, practice, and use our service.
    • Create and Customize Your Avatar

      Play with our fun little avatar builder to create and customize your own avatar on StudyPug. Choose your face, eye colour, hair colour and style, and background. Unlock more options the more you use StudyPug.
    Topic Notes

    In this lesson, we will learn:

    • 24-hour clock time is used instead of 12-hour clock time to avoid being confused about AM or PM
    • There are 24 hours in a day, so instead of the hours being labelled 1-12 AM or 1-12 PM, we can label them from 1-24 instead.
    • There are rules for converting between 12-hour clock time and 24-hour clock time (and vice versa)


    • Using 12-hour clock time can be confusing because you might not know if someone is telling you a time for AM or PM (ex. is it 6 o’clock in the morning or evening?)

    • By using 24-hour clock time, we can avoid the confusion of not knowing AM/PM
      • There are 24 hours in a day
        • The previous days ends, and the new day starts at midnight (12:00 AM)
        • The middle of the day is right at noon (12:00 PM)
      • For 24-hour time, you say the hours directly from 00 until 24 (or back to 00)
    Time: Reading 24-Hour Clock Time

    • This table shows all the equivalent times for the 12-hour clock and 24-hour clock:
    Time: Reading 24-Hour Clock Time

      • When it goes to midnight (12AM), it becomes 24:00 which is the same as 00:00
      • Do not use this table when doing the practice questions; only for checking

    • To convert from AM/PM time (12-hour clock time) to 24-hour time:

    • \qquad 1. Minutes: stay the same
      \qquad 2. Hours:
        • if AM, keep the same (add leading 0)
        • if PM add 12

      \qquad 3. Exceptions: 12AM = 00h, 12PM = 12h
      • Ex. (8:46AM = 08:46), (5:13PM = 17:13), (12:07AM = 00:07)

    • To convert from 24-hour time to AM/PM time :

    • \qquad 4. Minutes: stay the same
      \qquad 5. Hours
        • if < 12, keep same, remove leading 0, and write AM
        • if > 12 subtract 12 and write PM

      \qquad 6. Exceptions: 00:00 = 12AM and 12:00 = 12PM
      • Ex. (09:54 = 9:54AM), (22:38 = 10:38PM), (00:16 = 12:16AM)