Rest Hours Calculator for Seafarers
Check whether a schedule meets STCW or MLC 2006 rest-hour rules. Enter the rest periods you were actually given, or simulate a weekly work schedule and let the tool work out your rest for you. When something doesn't add up, it tells you exactly which rule is broken — not just "non-compliant."
1. Choose the regulatory framework
STCW and the MLC's minimum-rest option use the same rest thresholds. The MLC also lets a flag state fix maximum working hours instead — pick that option if that's how your flag state applies it.
2. Enter your schedule
Use whichever is easier: the rest periods you actually had, or your weekly work shifts (the simulator works out your rest for you).
Results
Timeline
How this calculator works
Enter either the rest periods you were actually given during a 7-day (or longer) stretch, or your work shifts if that's easier to remember — the simulator will work out your rest periods automatically. The tool then checks that schedule against four things: enough rest in any rolling 24-hour period, enough rest in any rolling 7-day period, rest that isn't split into more pieces than the rules allow, and no excessively long stretch between rest periods. If you chose the MLC maximum-work-hours option instead, it checks your work hours directly against the 14-hour and 72-hour limits.
Every violation is reported against the specific rule it breaks, with the actual shortfall, rather than a single pass/fail flag — read more about the two frameworks on the STCW vs MLC page, or see what happens in practice if an inspection finds a shortfall on the Port State Control page.