What is the 34-hour restart?

34 or more consecutive hours off duty or in the sleeper berth reset the 60-hour or 70-hour cycle to zero. It is optional.

Is this HOS calculator a certified ELD?

No. It is a planning tool that runs in your browser. It is not an electronic logging device and is not a substitute for your ELD or for the text of 49 CFR Part 395.

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HOS Calculator for Property-Carrying Drivers

Q: How does the sleeper berth split work?

A driver can pair one period of at least 7 consecutive hours in the sleeper berth with another period of at least 2 consecutive hours off duty or in the sleeper berth, as long as the two add up to at least 10 hours. Neither period counts against the 14-hour window, and the 11-hour and 14-hour clocks are recalculated from the end of the first period.

Enter your duty status log and see how much drive time, 14-hour window, 30-minute break time and 60/70-hour cycle you have left under FMCSA hours of service rules (49 CFR Part 395). It supports the sleeper berth split, the 34-hour restart, adverse driving conditions and the short-haul exemption. Everything runs in your browser.

Hours of service clocks

Property-carrying CMV drivers. Times shown in the home terminal time zone.

Settings

Cycle Home terminal time zone Current time Adverse driving conditions (+2 h) Short-haul (150 air-mile) exemption

Recap: on-duty hours for earlier days (optional)

Use this instead of entering a full log. Enter total on-duty hours (driving + on duty not driving) for each earlier day, starting with yesterday. Days that your log rows already cover are taken from the log.

Duty status log

OFF = off duty, SB = sleeper berth, D = driving, ON = on duty not driving. PC (personal conveyance) counts as off duty and YM (yard move) counts as on duty. A gap between rows counts as off duty. Rows are sorted automatically.

For planning only — not a certified ELD; verify against 49 CFR 395. Applies to property-carrying drivers. It does not cover passenger-carrying rules, oilfield, agricultural or other special exceptions, or state rules.

How this HOS calculator works

The calculator reads your duty status rows minute by minute and applies these rules for property-carrying drivers:

11-hour driving limit: at most 11 hours of driving after 10 consecutive hours off duty (49 CFR 395.3(a)(3)(i)).
14-hour window: no driving after the 14th hour since coming on duty following 10 consecutive hours off duty. Off-duty time inside the window does not extend it.
30-minute break: a break of at least 30 consecutive minutes is needed once 8 cumulative hours of driving have passed without one. Off duty, sleeper berth and on duty not driving all count as a break.
60/70-hour cycle: no driving after 60 on-duty hours in 7 consecutive days or 70 hours in 8 consecutive days. Days are counted in the home terminal time zone.
34-hour restart: 34 or more consecutive hours off duty or in the sleeper berth reset the cycle to zero.
Sleeper berth split: one period of at least 7 consecutive hours in the sleeper berth paired with another period of at least 2 consecutive hours (off duty or sleeper berth), adding up to at least 10 hours. Neither period counts against the 14-hour window, and the 11-hour and 14-hour clocks are recalculated from the end of the first period (49 CFR 395.1(g)(1)).
Adverse driving conditions: up to 2 extra hours on the 11-hour limit and the 14-hour window for the current shift.

Rule text and any updates are published by the Federal Motor Carrier Safety Administration. Always check the current text of 49 CFR Part 395 before relying on any result.

Frequently asked questions

What is the 14-hour rule?

A property-carrying driver may not drive after the 14th consecutive hour after coming on duty following 10 or more consecutive hours off duty. Time spent off duty inside the window does not pause or extend it, except through a qualifying sleeper berth split.

When is the 30-minute break required?

Driving is not allowed once 8 cumulative hours of driving have passed without a break of at least 30 consecutive minutes. The break clock counts driving time only, not time on duty.

How does the sleeper berth split work?

You can pair a sleeper berth period of 7 or more hours with a second period of 2 or more hours, off duty or in the sleeper berth, as long as the two total at least 10 hours. Common combinations are 7/3 and 8/2, in either order. This calculator lists which periods it paired.

Is this a certified ELD?

No. It is a planning tool and does not record your driving. Your registered ELD and the text of 49 CFR Part 395 are the reference for compliance.

Building an ELD product?

Inurum Technologies builds white-label ELD software, driver apps and admin portals, and integrates ELD hardware. This calculator is a free tool from our engineering team.

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