About Free Military Time Calculator
Free, accurate military time tools for anyone who works with the 24-hour clock, built with the rules explained on every page.
Who we are
Free Military Time Calculator is an independent website that builds free tools for the 24-hour clock. It exists for one everyday problem: shift rosters, time cards and logs where one AM/PM mix-up means a missed dose, a wrong pay check or a late handover. The question we answer is asked every day in hospitals, dispatch centers, warehouses and military families: what time is that in normal time?
What we build
The Site has 10 free tools and a library of guides that explain the rules behind them:
- Military to Standard Time: Turn any 4-digit military time such as 2145 into regular 12-hour AM/PM time.
- Standard to Military Time: Convert civilian AM/PM time into 24-hour military time with a leading zero.
- 24-Hour to 12-Hour Converter: Read 24-hour clock times like 18:30 as 12-hour time in one step.
- 12-Hour to 24-Hour Converter: Switch AM/PM times to the 24-hour format used worldwide.
- Military Time Calculator: Add or subtract hours and minutes, or find the time between two military times.
- Time Card & Shift Calculator: Enter clock-in and clock-out times to total shift hours, including overnight shifts.
- Military Minutes Conversion: Convert minutes to decimal hours for payroll and time sheets (15 min = 0.25).
- Military Time Zone Converter: Convert a military time between Eastern, Central, Mountain, Pacific and UTC.
- Current Military Time: A live military clock with seconds for your time zone or any US zone.
- Military Time Chart: Printable 24-hour chart of every hour and minute in military and standard time.
How we make sure the results are right
Accuracy is the reason the Site exists. 4 checks protect every result:
- One shared formula. Every tool uses the same conversion code, so a fix in one place fixes every tool.
- Automated tests. The code converts all 1,440 minutes of the day in both directions and confirms each result converts back to the start time.
- Edge cases. Tests cover midnight (0000/2400), noon (1200), the 12 AM hour, invalid times such as 2500, and shifts that cross midnight.
- Primary sources. Rules follow NIST time-of-day conventions, ISO 8601 and U.S. Department of Labor guidance, listed in our editorial policy.
What we believe
- Answers first. Every page gives the answer, then the rule, then worked examples.
- Free, with no sign-up. The tools run in your browser and work on any phone or computer.
- Private by design. The times you enter never leave your device.
- Independent. Advertising keeps the Site free, and advertisers never influence the tools or articles.
Who uses the Site
Nurses charting medication times, pilots and dispatchers working in Zulu time, service members and their families, shift workers filling in time cards, students preparing for the ASVAB or nursing exams, and travelers reading 24-hour timetables. The Site is available in 18 languages.
Contact us
Spotted a mistake or want a new tool? Email contact@freemilitarytimecalculator.com or use thecontact form. We read every message and correct confirmed errors. See also ourprivacy policy, disclaimer and terms of use.