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HOS Calculator — 11 / 14 / 70 Clocks

How much drive time can the driver still do? Enter shift and cycle hours — get the binding clock (drive limit, 14-hr window, cycle, or 30-min break) and remaining margin. FMCSA §395.3, property-carrying CMV drivers.

Current shiftHours in — driving, on-duty, wall-clock elapsed

Driven

Cumulative driving hours

On-duty

Driving + on-duty-not-driving

Since shift start

Wall-clock hours

30-minute break

Required after 8 cumulative driving hours

CycleRolling on-duty limit

Cycle hours used

On-duty hours in the rolling 8-day window (excluding this shift)

Formula

Drive remaining = min(11 − driven, 14 − elapsed, cycle-cap − (cycle-used + on-duty), break-gate)
Break gate = 8 − driven, or 0 once the 30-min break is taken
14-hr window = Once (now − shift-start) reaches 14, no more driving until a 10-hr off-duty reset
Cycle cap = 70 hrs / rolling 8 days (default) or 60 hrs / rolling 7 days
Status priority = cycle-exhausted > drive-done > break-due > window-closing (≤2 hrs) > ok

Source: U.S. FMCSA — 49 CFR §395.3 (Maximum driving time for property-carrying vehicles). Break requirement per §395.3(a)(3)(ii). Not legal advice; verify against your logging device and carrier policy.