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Truck HOS Duty Clock Estimator

Estimate duty-clock arithmetic from entered driving, on-duty, break, and rest periods; verify the result against current HOS rules and logs.

Inputs

Property-carrying clock totals

Range: at least 0 hr

Enter driving time in the current driving period after the qualifying rest used to start the 14-hour window.

Range: at least 0 hr

Enter elapsed time since coming on duty after qualifying rest, including non-driving time. Special split-sleeper and exceptions are not calculated.

Range: at least 0 hr

Enter driving time since the most recent qualifying interruption in driving status. If the 30-minute interruption has been completed, reset this input accordingly.

Range: at least 0 hr

Enter the cycle total from the applicable preceding 7- or 8-day period, including the current on-duty time as required by the rules.

Select 60 hours/7 days if the carrier does not operate every day, or 70 hours/8 days if it operates every day. Verify applicability and current records.

Result

Driving hours until next required clock stop
—
Driving hours until 30-minute interruption required
—
On-duty hours remaining in selected cycle
—
Driving hours remaining under 11-hour limit
—
Elapsed hours remaining in 14-hour window
—
HOS estimate status
—

Remaining clock formulas

Driving hours remaining under 11-hour limit
—
Elapsed hours remaining in 14-hour window
—
Driving hours until 30-minute interruption required
—
On-duty hours remaining in selected cycle
—
Driving hours until next required clock stop
—

Related calculators

Estimates depend on the inputs and assumptions shown on each tool. Verify important figures against your records, contracts, and current official requirements.