03:40 is 3:40 AM on a 12-hour clock and "03:40 Hours" in Military Time. We use this system throughout the world (not just the military) and leverages a 24-hour time clock rather than the 12-hour AM/PM system known to most English-speaking countries. Below are ways to convert 03:40 through a time chart, automated calculator, and ways to convert by hand.
| 24-hour format | 12-hour format |
|---|---|
| 03:40 | 3:40 AM |
A quick cheatsheet for all time conversions like 3:40 AM. Click the clock. Select your time. We'll highlight the row for the time you choose.
It is easy to convert from 24-hour time to 12-hour time once you know a few tricks. The primary difference between the two is that the hours in a 24-hour clock go all the way up to 23 (from 0 to 23). In a 12-hour clock, the hour resets to 1 after noon (midday). Follow the steps below to convert 03:40 to 12-hour time.
24-hour time is used in aviation, military, meteorology, logistics, and other fields. The 12-hour clock is only used in 18 countries globally, including the United States and Canada. 24-hour time and military time are very similar! See our military time converter for more information.
| 24 Hour Clock | 12 Hour Clock (AM/PM) | Military Time |
|---|---|---|
| 03:40 | 3:40 | 0340 |
| 03:45 | 3:45 | 0345 |
| 03:50 | 3:50 | 0350 |
| 03:55 | 3:55 | 0355 |
| 04:00 | 4:00 | 0400 |
| 04:05 | 4:05 | 0405 |
| 04:10 | 4:10 | 0410 |
| 04:15 | 4:15 | 0415 |
| 04:20 | 4:20 | 0420 |
| 04:25 | 4:25 | 0425 |
| 04:30 | 4:30 | 0430 |
| 04:35 | 4:35 | 0435 |
| 04:40 | 4:40 | 0440 |
| 04:45 | 4:45 | 0445 |
| 04:50 | 4:50 | 0450 |
| 04:55 | 4:55 | 0455 |