12 & 24 Hour Time worksheets
12 & 24 Hour Time worksheets give students in Grade 5 to Grade 6 focused practice in converting between 12 and 24 hour time. This page has 12 free printable sets, grouped by grade, and every set includes a computed answer key that is never wrong. Print them or save as a PDF, no login needed, or generate a fresh one.
What is 12 & 24 hour time?
24-hour time counts the hours from 00 to 23, so 3 pm is 15:00 (used on timetables and digital clocks). 12-hour time uses am and pm.
How to teach it
Line up 12- and 24-hour time: after midday, add 12 to the hour (1 pm = 13:00); midnight is 00:00, midday is 12:00. Practise converting both directions.
Worked example
Common mistake
Adding 12 to morning (am) times, and mishandling 12 am (→ 00:00) and 12 pm (stays 12:00).
What's inside
- Write 14:40 in 12-hour time (with am or pm).
- Write 6:05 am in 24-hour time.
- Write 15:50 in 12-hour time (with am or pm).
- Write 14:15 in 12-hour time (with am or pm).
- Write 1:30 am in 24-hour time.
- Write 21:40 in 12-hour time (with am or pm).
Sample questions. Each set (A, B, C…) has fresh numbers and a computed answer key.
Grade 5 12 & 24 Hour Time
All Grade 5 worksheets →Grade 6 12 & 24 Hour Time
All Grade 6 worksheets →Frequently asked questions
Are these 12 & 24 hour time worksheets free?
Yes. Every worksheet on ChalkBee is free to view, print and download as a PDF. There is no paywall and you do not need to log in or create an account.
Do the worksheets have answer keys?
Yes. Every set comes with a full answer key. For maths, the answers are computed in code from the exact numbers printed on the sheet, so the key is never wrong.
What grades do 12 & 24 hour time worksheets cover?
12 & 24 Hour Time worksheets on this page cover Grade 5 to Grade 6. There are 12 printable sets in total, grouped by grade so you can pick the right level.
How do I print or download them?
Open any set, then use your browser's print option to print it or to save it as a PDF. The pages are laid out to print cleanly on standard letter or A4 paper.