Decimal hours to 24-hour clock
Type a value in h to get it in 24-hour instantly.
15:0024-hour
In military time that is 1500; on a 12-hour clock, 3:00 PM.
What it means
When in the day is that?
Midnight is 0000 (00:00), the start of the day. Some armies also write the end of the day as 2400.
The math
How to convert h to 24-hour
Before noon, the hours stay the same; from 1300 on, subtract 12 and add PM. Midnight is 0000 and noon is 1200.
Example: 15 h = 15:00 24-hour.
Every unit
That time on every clock
Tables
h to 24-hour conversion table
| h | 24-hour |
|---|---|
| 0 h | 00:00 24-hour |
| 1 h | 01:00 24-hour |
| 6 h | 06:00 24-hour |
| 7.5 h | 07:30 24-hour |
| 9 h | 09:00 24-hour |
| 12 h | 12:00 24-hour |
| 12.5 h | 12:30 24-hour |
| 13 h | 13:00 24-hour |
| 14 h | 14:00 24-hour |
| 15 h | 15:00 24-hour |
| 16 h | 16:00 24-hour |
| 17 h | 17:00 24-hour |
| 18 h | 18:00 24-hour |
| 19 h | 19:00 24-hour |
| 20 h | 20:00 24-hour |
| 21 h | 21:00 24-hour |
| 22 h | 22:00 24-hour |
| 23 h | 23:00 24-hour |
| 23.5 h | 23:30 24-hour |
24-hour to h conversion table
| 24-hour | h |
|---|---|
| 00:00 24-hour | 0 h |
| 01:00 24-hour | 1 h |
| 06:00 24-hour | 6 h |
| 07:30 24-hour | 7.5 h |
| 09:00 24-hour | 9 h |
| 12:00 24-hour | 12 h |
| 12:30 24-hour | 12.5 h |
| 13:00 24-hour | 13 h |
| 14:00 24-hour | 14 h |
| 15:00 24-hour | 15 h |
| 16:00 24-hour | 16 h |
| 17:00 24-hour | 17 h |
| 18:00 24-hour | 18 h |
| 19:00 24-hour | 19 h |
| 20:00 24-hour | 20 h |
| 21:00 24-hour | 21 h |
| 22:00 24-hour | 22 h |
| 23:00 24-hour | 23 h |
| 23:30 24-hour | 23.5 h |
Quick answers
Quick answers
- How many 24-hour is 1 h?
- 1 h is 01:00 24-hour.
- How many 24-hour is 10 h?
- 10 h is 10:00 24-hour.
- How many 24-hour is 15 h?
- 15 h is 15:00 24-hour.
The units
About these units
Decimal hours (h)
Hours since midnight as a decimal number: 14.5 is 14:30.
24-hour clock (24-hour)
The everyday clock in most of the world: 14:30.
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