Sleeper berth split calculator.

What the rule allows

A property-carrying driver whose truck has a sleeper berth can meet the 10 consecutive hours off duty requirement of 395.3(a)(1) in a split. Section 395.1(g)(1)(ii) lets the driver accumulate the equivalent of 10 hours with not more than two periods of sleeper berth time, or a combination of off-duty and sleeper berth time, if four things are true. Neither rest period is shorter than 2 consecutive hours. One rest period is at least 7 consecutive hours in the sleeper berth. The two periods total at least 10 hours. And the driving time in the period immediately before and after each rest period, added together, does not exceed 11 hours under 395.3(a)(3) and does not violate the 14-hour duty period limit of 395.3(a)(2).

The popular names 7/3 and 8/2 are shorthand for the two common splits: a 7-hour sleeper berth period paired with a period of at least 3 hours, or an 8-hour period paired with at least 2. The regulation does not name them; it only sets the three minimums, so 7 and 3, 8 and 2, 9 and 2, or 7.5 and 2.5 all pass.

What the 14-hour clock does

The driving time limit and the 14-hour limit are re-calculated from the end of the first of the two qualifying periods (395.1(g)(1)(iii)(A)). The 14-hour driving window does not include a qualifying rest period (395.1(g)(1)(iii)(B)). The regulation states both rules in those words and this page does not paraphrase them further. This tool checks the three rest conditions and, if you enter driving hours, the 11-hour sum around each period. It does not model the 14-hour window.

Which rest counts as the 7

The 7-hour period must be in the sleeper berth. The other period can be sleeper berth time or off-duty time, and it must be at least 2 consecutive hours. So 8 hours off duty at home plus 2 hours in the berth does not qualify as a split because neither period is a 7-hour sleeper berth period, while 7 hours in the berth plus 3 hours off duty does. A separate provision in (g)(1)(i)(D) allows a 7-hour sleeper berth period combined with up to 3 hours riding in the passenger seat while the vehicle is moving on the highway, immediately before or after the berth time, to make 10 consecutive hours. That option is not what this tool tests.

Worked example

A driver drives 5 hours, takes a 3-hour off-duty break, drives another 4 hours, then takes a 7-hour sleeper berth rest and drives 2 hours before reaching the next stop. Rest periods are 3 hours off duty and 7 hours in the sleeper berth, which satisfy the minimums: both at least 2 hours, one is 7 in the sleeper berth, and the total is 10. Driving around the first rest period is 5 plus 4, or 9 hours. Driving around the second is 4 plus 2, or 6 hours. Both are within 11. Now change the 7-hour period to off duty at a motel: the 7 hours is not in the sleeper berth, so the pair does not qualify.

Limits

This page applies the 395.1(g)(1) text for property-carrying vehicles to the numbers you enter. It does not handle passenger carriers, oil well service vehicles (a separate rule in (g)(2)), adverse driving conditions, or the 30-minute break. Exemption eligibility, state rules and ELD recording of a split are not covered. We read the eCFR text current through October 29, 2026.

Sources

Sources opened and read November 2, 2026.

• eCFR: 49 CFR 395.1, scope of rules in this part; sleeper berths (current through October 29, 2026) (read November 2, 2026)
• eCFR: 49 CFR 395.2, definitions, sleeper berth (current through October 29, 2026) (read November 2, 2026)
• eCFR: 49 CFR 395.3, maximum driving time for property-carrying vehicles (current through October 29, 2026) (read November 2, 2026)