Hours-of-Service Calculator for Truck Drivers
Plan your driving window, break timing, weekly cycle, and split-sleeper options. This is a planning aid—not legal advice—so always verify your log with your ELD and carrier policy.
Today’s hours and cycle
Enter the hours already used so the calculator can estimate the time remaining in each limit.
Split-sleeper planning
Enter both qualifying rest periods to check the basic split pattern.
How HOS is calculated
11-hour driving limit: You may drive up to 11 hours after 10 hours off duty.
14-hour window: The work window begins when your workday starts. Off-duty time generally does not extend it.
30-minute break: After 8 cumulative hours of driving, you need a qualifying 30-minute interruption before driving again.
60/70-hour cycle: You cannot drive after reaching your carrier’s 60-hour/7-day or 70-hour/8-day on-duty limit.
Split sleeper berth: A standard property-carrier split uses a sleeper period of at least 7 consecutive hours plus a separate qualifying period of at least 2 hours; together they must total at least 10 hours.
Common mistakes: treating the break as extra driving time, assuming off-duty always pauses the 14-hour window, forgetting on-duty counts toward the cycle, or pairing non-qualifying rest periods.
Important: Rules can vary by operation and exception. Compare this estimate with your ELD before moving.