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
Sets A-F are the same worksheet with different questions - print any (or all) for fresh practice.
Grade 6 12 & 24 Hour Time
Sets A-F are the same worksheet with different questions - print any (or all) for fresh practice.
Frequently asked questions
Are these 12 & 24 hour time worksheets free?
Yes. Every worksheet on ChalkBee is free to view and print or save as a PDF, with no login required. Pro unlocks the printable answer key and removes the watermark.
Do the worksheets have answer keys?
The answers are computed in code from the exact questions on each sheet. The printable answer key is available with Pro.
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.