12-hour and 24-hour time
Type a civilian time or move the 24-hour slider and see the matching military-time label immediately.
Inputs
Answer
Use it in code
# Military Time Calculator
print("3:45 PM = 15:45")The snippets print the same headline answer shown above for the current inputs.
Print Room
Answer: 3:45 PM = 15:45
| 24-hour slider value | 15:45 = 3:45 PM |
|---|---|
| Civil-to-military | 15:45 |
| Midnight rule | 00:00 = 12:00 AM |
Check the input convention, write any policy exceptions below, then attach this sheet to the calendar, roster, invoice or planning note it supports.
Method
Search intent: Best answer for converting one clock time between 12-hour and 24-hour notation.
Nearest sibling: This is a notation converter, not a time-span calculator; hours-between-times handles elapsed duration.
Worked check: 3:45 PM = 15:45; 00:30 = 12:30 AM.
Military time is a 24-hour clock label. Midnight begins at 00:00, noon is 12:00, 1 PM is 13:00 and 11 PM is 23:00. The conversion is simple, but the edge cases of midnight and noon cause many mistakes.
The quick-reference table exists for scanning. People often arrive with a practical need like reading a roster, medicine label, travel itinerary or shift handoff. The table covers the common anchors while the slider handles any exact minute.
Good date and time tools need to be explicit about what is being counted. Two people can ask the same words and mean different things: elapsed days, calendar cells touched, working days, overnight clock span, ISO week, local civil time or payroll hours. This page names that intent before it shows the number. That is why sibling calculators stay separate when the question is meaningfully different and why redirect recommendations are called out when two slugs collapse to the same job. The other trust boundary is local time. A browser can format IANA time zones with Intl, but holidays, employment rules, rosters, school calendars and payroll policies are human systems. The calculator gives a transparent arithmetic core, visible assumptions, code snippets and a printable worksheet so a user can compare the result with the official calendar, award, contract or schedule that governs their real situation.
The practical way to audit this calculation is to write down the inputs in the same units the page uses, do the smallest possible independent count, and then compare that count with the displayed result. For date pages that means checking the first day, last day, inclusion rule and whether the count is elapsed or inclusive. For clock pages it means converting each clock time to minutes from midnight, doing the subtraction, and only then converting back to hours and minutes. For week-number and world-clock pages it means checking the governing convention: ISO Monday weeks for ISO labels, IANA zone names for civil time, and a single instant shared across every displayed city. The worksheet is deliberately written like an audit slip because date and time errors are often off-by-one errors that only become obvious when the convention is visible.
The visual is part of that audit, not decoration. A span that crosses midnight should look different from a same-day span. A counted date range should show the start and landing points rather than merely printing a number. A week-number page should remind the user that weeks are a grid over a year, not a property of a single month. A time-card page should show daily bars because one long day and five moderate days can produce the same weekly total while meaning different things operationally. The Playwright check changes an input and asserts the SVG geometry changes so the drawing cannot silently drift into a static illustration.
The code panel is intentionally small. It does not try to replace a full calendar library or a payroll system. It prints the headline result for the current inputs using standard Python or JavaScript so a reviewer can reproduce the number outside the page. That is useful for classrooms, blog posts, job notes, invoices and internal QA because the copied report, printable sheet and code snippet all describe the same current calculation. When this page says a sibling should be reviewed for redirect, that is also a product-quality claim: CalculationTime should keep pages when they answer meaningfully different jobs, and collapse pages when the only difference is wording around the same engine.
FAQ
Midnight at the start of the day is 00:00, which is 12:00 AM in 12-hour notation.
Noon is 12:00. The PM hours after noon continue as 13:00 through 23:59.
For 1 PM through 11 PM, add 12 to the hour. For 12 PM, keep the hour as 12.
For 1 AM through 11 AM, keep the hour. For 12 AM, use 00.
No. It converts notation for one clock time; use Hours Between Times for a duration.
The two controls make the edge cases visible from either direction.
Sources
Questions people ask
Midnight at the start of the day is 00:00, which is 12:00 AM in 12-hour notation.
Noon is 12:00. The PM hours after noon continue as 13:00 through 23:59.
For 1 PM through 11 PM, add 12 to the hour. For 12 PM, keep the hour as 12.
For 1 AM through 11 AM, keep the hour. For 12 AM, use 00.
No. It converts notation for one clock time; use Hours Between Times for a duration.
The two controls make the edge cases visible from either direction.
Certification notes
Phase 6 Date & Time tranche page with live inputs, diagram, code snippets, report copy and worksheet. Reviewed 2026-09-23.
This calculator is an arithmetic planning tool. Official payroll, legal, travel, school and holiday calendars may apply additional rules.
Use the canonical URL, the page title “Military Time Calculator - CalculationTime”, and the review date 2026-09-23.