Use this military time calculator to add or subtract hours and minutes from military time, 24-hour time, or standard AM/PM time. Enter a starting time, choose whether to add or subtract time, and get the result instantly.
Military Time Calculator
Add or subtract hours and minutes from military time.
How to Use the Military Time Calculator?
Enter a starting time, select whether you want to add or subtract time, then enter the number of hours and minutes.
The calculator accepts common time formats, including:
- 1700 for military time
- 17:00 for 24-hour time
- 5 PM for standard time
- 5:30 PM for standard time with minutes
Military Time Calculator Examples
| Starting Time | Calculation | Result |
|---|---|---|
| 1700 | Add 2 hours 30 minutes | 1930 = 7:30 PM |
| 1830 | Subtract 1 hour 15 minutes | 1715 = 5:15 PM |
| 0800 | Add 4 hours | 1200 = 12:00 PM |
| 1200 | Add 3 hours 45 minutes | 1545 = 3:45 PM |
| 2130 | Add 2 hours | 2330 = 11:30 PM |
| 0030 | Subtract 1 hour | 2330 = 11:30 PM on the previous day |
Adding Time in Military Time
To add time in military format, add the hours and minutes to the starting time. When the result goes past 2359, the time moves into the next day.
For example, 2200 plus 3 hours equals 0100 on the next day. In standard time, that means 10:00 PM plus 3 hours equals 1:00 AM.
Subtracting Time in Military Time
To subtract time, remove the chosen hours and minutes from the starting time. When the result goes below 0000, the time moves into the previous day.
For example, 0030 minus 1 hour equals 2330 on the previous day. In standard time, that means 12:30 AM minus 1 hour equals 11:30 PM.
Military Time and Standard Time Reference
| Military Time | 24-Hour Time | Standard Time |
|---|---|---|
| 0000 | 00:00 | 12:00 AM |
| 0600 | 06:00 | 6:00 AM |
| 0800 | 08:00 | 8:00 AM |
| 1200 | 12:00 | 12:00 PM |
| 1400 | 14:00 | 2:00 PM |
| 1700 | 17:00 | 5:00 PM |
| 1830 | 18:30 | 6:30 PM |
| 2100 | 21:00 | 9:00 PM |
| 2300 | 23:00 | 11:00 PM |
Frequently Asked Questions
How do you add time in military time?
Enter the starting military time, choose Add Time, then enter the number of hours and minutes. The calculator will show the new military time and standard AM/PM time.
How do you subtract time in military time?
Enter the starting time, choose Subtract Time, then enter the hours and minutes to remove. The calculator will also show whether the result falls on the previous day.
What is 1700 plus 2 hours?
1700 plus 2 hours is 1900 military time, which is 7:00 PM.
What is 0030 minus 1 hour?
0030 minus 1 hour is 2330 on the previous day, which is 11:30 PM.
Can I use AM and PM time in the calculator?
Yes. You can enter a time such as 5 PM or 5:30 PM, and the calculator will convert it automatically before doing the calculation.
Use the Military Time Converter to convert one time format to another.
Learn how to read military time with a beginner-friendly guide.