Hours of Service (HOS) Calculator

Enter your shift details to see how much drive time you have left today, when you have to stop, and whether your 30-minute break requirement is satisfied — based on current FMCSA Hours of Service rules. Free, no signup.

Not a substitute for your ELD. This tool covers the core rules for property-carrying drivers — the 11-hour driving limit, 14-hour on-duty window, 30-minute break, and 60/70-hour weekly cap. It does not account for sleeper berth splits, the adverse driving conditions exception, the short-haul exemption, agricultural exemptions, or active FMCSA pilot programs. Always confirm against your ELD and carrier policy.

Today’s Shift

Shift Start Time

Hours Driven So Far Today

On-Duty Hours, Not Driving

I’ve already taken my 30-minute break today

This Week (Optional)

Which Limit Applies?

On-Duty Hours So Far This Period

The Core HOS Rules This Tool Uses

11-Hour Driving Limit — Maximum 11 hours of driving after 10 consecutive hours off duty.
14-Hour On-Duty Window — Driving is not allowed past the 14th consecutive hour after coming on duty. Off-duty time during the day does not pause or extend this window.
30-Minute Break — Required after 8 cumulative hours of driving. Can be satisfied by off-duty, sleeper berth, or on-duty-not-driving time of at least 30 minutes.
60/70-Hour Weekly Limit — Drivers cannot drive after 60 hours on duty in 7 consecutive days, or 70 hours in 8 consecutive days, depending on which schedule the carrier operates under. A 34-hour restart resets this clock to zero.

Why the 11-Hour and 14-Hour Rules Aren’t the Same Thing

These two limits are often confused, but they work independently — whichever one runs out first is the one that stops you. The 11-hour limit only counts actual driving time. The 14-hour window counts everything from the moment you go on duty, including loading, inspections, fuel stops, and paperwork — and it keeps ticking even while you’re not driving.

That means a driver who spends 3 hours loading and dealing with paperwork before ever turning a wheel only has 11 hours left to drive, but just 11 hours left in their 14-hour window too — both run out at the same clock time in that scenario, even though only the 14-hour rule was actually “used up” by the loading time.

Frequently Asked Questions

Does off-duty time during the day extend my 14-hour window?

No. The 14-hour on-duty window is a fixed countdown from when you first come on duty — taking a break, eating, or going off-duty mid-shift does not pause it or push it back.

What satisfies the 30-minute break requirement?

Any uninterrupted 30-minute period that is off-duty, in the sleeper berth, or on-duty but not driving — for example, time spent at a loading dock counts, not just a meal break.

What’s the difference between the 60-hour and 70-hour limits?

The 60-hour/7-day limit applies to carriers that don’t operate every day of the week. The 70-hour/8-day limit applies to carriers that do operate daily. Most long-haul operations use the 70/8 schedule.

Is this calculator a substitute for my ELD?

No — this is a planning tool, not an official record of duty status. Your ELD is the legal record FMCSA and roadside inspectors rely on. Use this calculator to plan ahead, not as proof of compliance.

More Free Tools

Want to know your real operating costs, not just your hours? Use our Cost Per Mile Calculator or Rate Calculator to price out a load properly. Researching a company before doing business with them? Try our free Company Lookup tool, or decode a VIN before you buy.