Date and time
12 and 24-Hour Time Converter
Convert between 12-hour am/pm time, 24-hour time and military time.
Type 24-hour time (18:45 or 1845) or 12-hour time (6:45 pm).
12-hour
6:45 pm
- 24-hour
- 18:45
- Military
- 1845 hours
18:45 is 6:45 pm.
How it's worked out
- Afternoon or evening
18 − 12 = 6, pm6:45 pm
How to convert
13:00 to 23:59: subtract 12, pm · 00:00 to 00:59: 12, am · 12:00 to 12:59: 12, pm · 01:00 to 11:59: same, am
Worked example
18:45 is 18 − 12 = 6, so 6:45 pm, or 1845 hours in military time.
Questions people ask
What is 18:45 in 12-hour time?
6:45 pm. For any hour from 13 to 23, subtract 12 and add pm.
What is 00:30 in 12-hour time?
12:30 am: just after midnight.
What is military time?
24-hour time written without the colon and read as hours: 18:45 is 1845 hours.
About this calculator
Formula and rules last checked 25 October 2026Written and tested by the CalculatorDex teamReport a problem