34-Hour Restart Calculator (FMCSA Hours of Service)

Find when your 34-hour restart ends and compare the hours you get back with what a rolling 60/7 or 70/8 recap would give you tomorrow.

Under the US hours-of-service rules, a property-carrying driver who takes 34 or more consecutive hours off duty can reset the 60-hour/7-day or 70-hour/8-day limit to zero. This calculator shows when your restart is complete and, if you enter your recent on-duty hours, compares the restart with the hours you would get back by waiting for old days to roll off your recap.

How to use this tool

Enter the start date and time in home-terminal time, then select any clock change during the break.
Choose your cycle: 70 hours in 8 days or 60 hours in 7 days.
Optionally enter a complete 7- or 8-day recap, oldest first and ending on the restart start date.
Read the restart end time and compare the hours available with and without the restart.

Formula

Restart complete = start + 34 elapsed hours (clock time adjusted for selected offset change)

Cycle availability is limit minus duty in the complete recap, floored at zero. The next day drops the oldest entry and assumes no additional duty. After a valid restart the cycle resets; daily driving and duty-window limits still apply.

Example

You go off duty at 18:00 on Friday, November 6, 2026. Adding 34 hours gives 04:00 on Sunday, November 8. If your last eight days were 10, 12, 11, 13, 9, 0, 12 and 11 hours, you have used 78 hours, more than the 70-hour limit, so you have no hours left today and only 2 tomorrow when the 10-hour day drops off. The restart gives you all 70 hours back.

Frequently asked questions

Do I still need two 1 a.m. to 5 a.m. periods?

No. Current 49 CFR 395.3(c) requires 34 consecutive hours off duty for this restart. The former two-night and once-per-168-hours restrictions are not in the current rule.

Does sleeper-berth time count toward the 34 hours?

Yes, sleeper-berth time counts as off-duty time for the restart. Any on-duty activity, such as fueling, an inspection or paperwork, breaks the run and the 34 hours start again.

Do I have to take a restart?

No. A restart is optional. Compare your complete recap with the off-duty time required, while also checking daily driving limits. The calculator does not verify an ELD record or automatically determine daylight-saving transitions.

Does the restart also reset my 11-hour and 14-hour limits?

Those daily limits reset after 10 consecutive hours off duty, which a 34-hour break also meets. The 30-minute break is still required after 8 cumulative hours of driving.

Sources

Last updated: 2026