12h ⇄ 24h Converter

Instantly convert a 24-hour clock time into standard 12-hour AM/PM format.

The world is genuinely split on how to write the time of day: 12-hour format with AM and PM is standard in the United States and a handful of other countries, while most of the rest of the world uses 24-hour format, where the hours simply continue counting past 12 rather than resetting and adding a suffix. Neither format is more "correct," but the split means confusion between them is common whenever someone reads a time written in the format they're less used to.

The actual conversion is simple once you know the rule — subtract 12 from any 24-hour value above 12 to get the PM hour, and treat 00 as 12 AM — but that midnight and noon boundary is exactly where people most often make small mistakes, since "00:00" and "12:00" both intuitively feel like they should map to the number 12, but only one of them is AM and the other is PM, and 24-hour "12:00" is actually noon, not midnight.

This tool handles that conversion directly and live: type a 24-hour time, and it shows the correct 12-hour equivalent instantly, correctly handling the midnight and noon edge cases that are the most common source of manual conversion errors.

1. Enter a time using the 24-hour time picker.
2. The 12-hour equivalent appears immediately.
3. Press Convert if it doesn't update automatically.