What this calculator does
12-hour ↔ 24-hour (military) time works out clock time converted to 24-hour military format, and back. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaPM hours (except 12 PM) add 12; 12 AM = 00; the format drops the colon, e.g. 3:45 PM = 1545
The inputs explained
| Field | What to enter |
|---|---|
| Time | A time of day, in 24-hour format. |