Date Time
24-Hours Clock Calculator
Convert a 12-hour clock time to 24-hour format.
Free to use — no sign-up or login.
Result
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This free 24-Hours Clock Calculator covers Convert a 12-hour clock time to 24-hour format.
Enter the 24-Hours Clock Calculator fields, then read the output. Date Time calculators on this site keep the formula visible beside the form, with no account required.
Using the 24-Hours Clock Calculator
Convert a 12-hour clock time to 24-hour format. Fill the labeled fields on the 24-Hours Clock Calculator and read the result. The formula stays in How it works rather than being repeated here.
FAQ
How do I use the 24-Hours Clock Calculator?
Enter the labeled values on the 24-Hours Clock Calculator and read the output. Map the 12-hour hour and AM/PM flag onto 0–23.
What formula does the 24-Hours Clock Calculator use?
The 24-Hours Clock Calculator uses the identity in How it works. In words: Map the 12-hour hour and AM/PM flag onto 0–23.