How do I convert 12 AM to 24-hour time?

12 AM (midnight) is 00:00 in 24-hour time. The converter automatically adjusts the hour to 0 when you select AM and hour 12.

What is 12 PM in 24-hour time?

12 PM (noon) is 12:00 in 24-hour time. The converter keeps the hour as 12 when you select PM and hour 12.

Can I convert from 24-hour time back to AM/PM?

Yes, the converter has a one-click swap feature. Enter a time in 24-hour format (HH:MM) and click swap to see the equivalent AM/PM time.

Дата и время

Мгновенно, конфиденциально и бесплатно

Конвертер времени из 12-часового в 24-часовой формат.

4 авг. 2026 г.

Конвертируйте между 12-часовым форматом AM/PM и 24-часовым форматом в обе стороны, с корректной обработкой полуночи и полудня.

Этот калькулятор пока переведён не полностью — часть текста отображается на английском.

Расчёт на устройствеБез регистрации

Введите значения

Результаты обновляются во время ввода.

02 / ОТВЕТ

12-hour → 24-hour

Hour (1-12)

Minute (0-59)

AM / PM

24-hour time

00:00

Разбор

Ввод12:00 AM

Как пользоваться

The two cases people get wrong: 12:00 AM is midnight (00:00), not 12:00, and 12:00 PM is noon (12:00). For every other hour, PM adds 12 and AM stays the same.

Cite this calculator

Canonical URL: https://mathify.one/ru/date/time-format

Updated 4 авг. 2026 г.

Cite as: Mathify. (2026). Конвертер времени из 12-часового в 24-часовой формат. https://mathify.one/ru/date/time-format

Use Cases

Scheduling Across Time Formats

Quickly convert times for travel, work shifts, or international meetings to avoid confusion between AM/PM and military time.

Example: Convert 3:45 PM to 15:45 for a flight itinerary.

Understanding Military Time

Learn how to read and write military time by converting familiar AM/PM times to 24-hour format.

Example: See that 8:30 AM becomes 08:30.

Frequently Asked Questions

How do I convert 12 AM to 24-hour time?: 12 AM (midnight) is 00:00 in 24-hour time. The converter automatically adjusts the hour to 0 when you select AM and hour 12.
What is 12 PM in 24-hour time?: 12 PM (noon) is 12:00 in 24-hour time. The converter keeps the hour as 12 when you select PM and hour 12.
Can I convert from 24-hour time back to AM/PM?: Yes, the converter has a one-click swap feature. Enter a time in 24-hour format (HH:MM) and click swap to see the equivalent AM/PM time.

Tips & Common Mistakes

Tips

Remember: 12 AM is 00:00, and 12 PM is 12:00. The converter handles these correctly.
For times from 1:00 AM to 12:59 PM, the hour stays the same in 24-hour format (e.g., 9:30 AM = 09:30).
For times from 1:00 PM to 11:59 PM, add 12 to the hour (e.g., 3:00 PM = 15:00).
Use the swap button to quickly toggle between formats and double-check your conversions.

Common Mistakes to Avoid

Assuming 12 AM is 12:00 in 24-hour time. It's actually 00:00.
Forgetting to add 12 to PM hours after 12 PM. For example, 1 PM is 13:00, not 01:00.
Entering minutes outside the 0-59 range. The converter expects valid minute values.

Last updated: August 13, 2026