Time Format Converter
Convert any clock time between 12-hour and 24-hour format in either direction.
Time Format Converter
Related picks
Affiliate disclosure: these are demo Amazon links — we may earn a commission on qualifying purchases once you add your own Associates tag.
Multi-Function Digital Watch
Switch between 12-hour and 24-hour display on the wrist.
Handy for getting used to reading 24-hour/military time day to day.
View on AmazonScientific Calculator
A dedicated calculator for quick manual conversions and checks.
Useful for double-checking conversions when you're offline.
View on AmazonHow the Time Format Converter works
- Enter the time you want to convert.
- Select the conversion direction if it isn't detected automatically.
- Read both the 12-hour and 24-hour equivalents in the result.
Formula / logic
24-hour to 12-hour: subtract 12 from any hour after 12 and label it PM (00:00 becomes 12:00 AM). 12-hour to 24-hour: add 12 to any PM hour except 12 PM.
Worked example
14:00 in 24-hour time is 2:00 PM. Conversely, 9:00 PM becomes 21:00 in 24-hour (military) time.
Frequently asked questions
Which format do I need for international forms?
Most international and technical forms expect 24-hour format (e.g. 14:30 instead of 2:30 PM).
Why is midnight written as 00:00?
24-hour time starts each day at 00:00 rather than 12:00, avoiding the AM/PM ambiguity around midnight and noon.
Is military time the same everywhere?
The 24-hour clock format is the same worldwide, though it's more commonly used outside the US for everyday civilian purposes.
Is the Time Format Converter free to use?
Yes — every calculator on this site is free, with no sign-up or download required.
Does the Time Format Converter work on mobile?
Yes, the layout and calculator both adapt to phone and tablet screens.