1630 military time
1630 = 4:30 PM
1630 is half past 4 in the afternoon. With a colon it is 16:30.
Convert another time
How to read 1630
1630 is after noon, so subtract 12 from the hours: 16 − 12 = 4. Keep the minutes (30) and add PM: 4:30 PM.
For hours 13 to 19, ignore the 1 and take 2 from the second digit: 16 gives 6 − 2 = 4, PM.
1630 falls in the afternoon: 16 hours and 30 minutes after midnight, 68.8% of the way through the day, with 7 hours and 30 minutes left until the next midnight.
How to say it
Pilots and air traffic controllers say each digit: “one six three zero”. Off the radio, people usually read 1630 as two numbers.
Counting hours to and from 1630
Start and end times on a timesheet come down to this subtraction. The decimal column is the form many payroll systems want; the minutes to decimal chart covers every minute.
| Start | Length | Decimal |
|---|---|---|
| 0600 | 10 h 30 min | 10.50 |
| 0700 | 9 h 30 min | 9.50 |
| 0800 | 8 h 30 min | 8.50 |
| 0900 | 7 h 30 min | 7.50 |
| Add | Military | 12-hour |
|---|---|---|
| 1 h | 1730 | 5:30 PM |
| 2 h | 1830 | 6:30 PM |
| 4 h | 2030 | 8:30 PM |
| 8 h | 0030 | 12:30 AM (next day) |
| 10 h | 0230 | 2:30 AM (next day) |
| 12 h | 0430 | 4:30 AM (next day) |
1630Z: the same moment in other time zones
Written 1630Z, the time is in UTC, and the local clock depends on the zone and the season.
| Zone | Standard time | Summer time |
|---|---|---|
| US Eastern (New York) | 11:30 AM UTC−5 | 12:30 PM UTC−4 |
| US Central (Chicago) | 10:30 AM UTC−6 | 11:30 AM UTC−5 |
| US Mountain (Denver) | 9:30 AM UTC−7 | 10:30 AM UTC−6 |
| US Pacific (Los Angeles) | 8:30 AM UTC−8 | 9:30 AM UTC−7 |
| Alaska (Anchorage) | 7:30 AM UTC−9 | 8:30 AM UTC−8 |
| Hawaii (Honolulu) | 6:30 AM UTC−10 | no change |
| UK (London) | 4:30 PM UTC+0 | 5:30 PM UTC+1 |
| Central Europe (Berlin) | 5:30 PM UTC+1 | 6:30 PM UTC+2 |
| India | 10:00 PM UTC+5:30 | no change |
| Japan and South Korea | 1:30 AM (next day) UTC+9 | no change |
| Australia East (Sydney) | 2:30 AM (next day) UTC+10 | 3:30 AM (next day) UTC+11 |
For a particular date and city, use the time zone converter, which applies the exact daylight saving dates.
Nearby military times
The full chart is on the military time page.