24小时制转12小时制
将24小时制时间转换为附带上午/下午标识的12小时制时间。
24-hour → 12-hour
Accepts 14:30, 09:05 and 13:07:45. Hours run 00–23.
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Common conversions
| 24-hour | 12-hour | Military |
|---|---|---|
| 00:00 | 12:00 AM (midnight) | 0000 |
| 01:00 | 1:00 AM | 0100 |
| 06:30 | 6:30 AM | 0630 |
| 11:59 | 11:59 AM | 1159 |
| 12:00 | 12:00 PM (noon) | 1200 |
| 14:30 | 2:30 PM | 1430 |
| 18:00 | 6:00 PM | 1800 |
| 23:59 | 11:59 PM | 2359 |
计算原理
- The 24-hour clock runs 00:00–23:59 once per day; the 12-hour clock repeats 1–12 with AM and PM. Converting is an hour remap; minutes and seconds pass through unchanged.
- Hour 00 becomes 12:00 AM (midnight) and hour 12 becomes 12:00 PM (noon). These two cases cause most conversion mistakes and are handled explicitly here.
- Times outside 00:00–23:59 (such as 24:30, which is a duration rather than a time of day) are rejected with an explanation instead of rolled over silently.
使用提示
- Optional seconds are preserved: 13:07:45 converts to 1:07:45 PM.
- The military (four-digit) form is shown alongside: 14:30 is 2:30 PM and 1430.
- This tool converts format only. For zone-aware instants, use the time zone converter.
相关工具
常见问题解答
What is 00:00 in 12-hour time?
12:00 AM. Hour zero maps to midnight, written 12 AM on the 12-hour clock. 12:00 (noon) is 12:00 PM.
Why does 24:30 fail to parse?
The 24-hour clock runs 00:00–23:59. 24:30 is not a valid time of day (it is a duration expression). The tool rejects it clearly rather than rolling it over into the next day silently.
Does the converter keep seconds?
Yes, optional seconds are preserved exactly; for example, 13:07:45 converts to 1:07:45 PM.