Hours of service calculator
Enter when your shift started and what you've driven. See how much driving you have left, when your 14-hour window closes, when your 30-minute break is due and how much of your 60 or 70-hour cycle remains.
FREE · NO SIGN-UP · 49 CFR 395.3 · CHECKED 2026-10-05
YOUR SHIFT SO FAR
Your cycle
LOG TOTALS · ESTIMATERULES CHECKED 2026-10-05
- DRIVE NOW, BEFORE A BREAK
- 2:30
- 30-MIN BREAK DUE AFTER
- 2:30 MORE DRIVING
- 14-HOUR WINDOW CLOSES
- 20:00
- DRIVING LEFT THIS SHIFT
- 5:30
Drive up to 2:30, take at least 30 minutes not driving, then up to 3:00 more. What runs out first: the 11-hour driving limit.
Estimate for a solo property-carrying driver under 49 CFR 395.3, with no exceptions applied. Your ELD record is the legal record; check it before you drive. Not legal advice.
You have 5:30 of driving left this shift. Want loads booked to fit that clock, not the other way around?
Start dispatchHow the calculator works it out
Four federal limits decide how long a solo property-carrying driver can drive, and the calculator checks all of them at once. Whichever runs out first is your real limit for the shift.
11hr
11-hour driving limit
You may drive a maximum of 11 hours after 10 consecutive hours off duty.
49 CFR 395.3(a)(3)(i) · checked 2026-10-05
14hr
14-hour window
You may not drive beyond the 14th consecutive hour after coming on duty following 10 consecutive hours off duty. Off-duty time does not extend the window.
49 CFR 395.3(a)(2) · checked 2026-10-05
30min
30-minute break
After 8 cumulative hours of driving time without at least a 30-minute interruption, you must take a break of at least 30 consecutive minutes before driving again. Any non-driving status qualifies (off duty, sleeper berth, or on duty not driving).
49 CFR 395.3(a)(3)(ii) · checked 2026-10-05
70hr
60/70-hour limit
You may not drive after 60 hours on duty in 7 consecutive days (if your carrier does not operate every day of the week) or 70 hours on duty in 8 consecutive days (if it does).
49 CFR 395.3(b) · checked 2026-10-05
DRIVE LEFT = 11 - hours driven this shift WINDOW LEFT = 14 - hours since the shift started CYCLE LEFT = 70 (or 60) - on-duty hours in the last 8 (or 7) days BREAK DUE = 8 - hours driven since the last 30+ minute non-driving period DRIVE NOW = smallest of DRIVE, WINDOW, CYCLE and BREAK DUE SHIFT TOTAL = smallest of DRIVE, WINDOW minus a 30-minute break if one is needed, and CYCLE
ASSUMPTIONS
- The shift started after at least 10 consecutive hours off duty.
- The 30-minute break is taken off duty, so it uses window time but not cycle time. An on-duty break also counts as a break but adds to your cycle.
- Off-duty time during the day doesn't pause the 14-hour window.
- No exceptions are applied: adverse conditions, short-haul and sleeper-berth splits change the math, so they're explained below instead.
A worked example on a log
EXAMPLE: a driver comes on duty at 06:00 after a full 10 hours off. They do a 30-minute pre-trip, drive 4.5 hours, wait 2 hours on duty at a shipper, then drive 1 more hour. At 14:00 they open the calculator and enter: shift started 06:00, time now 14:00, 5.5 hours driven, 1 hour driven since a break (the 2-hour shipper wait counts as a break, because it was 30+ minutes not driving), and 48 hours used on a 70-hour cycle.
- SINCE SHIFT START
- 8:00
- DRIVEN THIS SHIFT
- 5:30
- DRIVEN SINCE BREAK
- 1:00
- CYCLE USED (70)
- 48:00
- WINDOW CLOSES
- 20:00
- DRIVING LEFT
- 5:30
The result: 5:30 of driving left, limited by the 11-hour rule. But the 14-hour window closes at 20:00, only 6 hours away, so there's just 30 minutes of slack. One more hour at a dock and the window, not the 11, becomes the limit. That's why a long wait at a receiver costs more driving time than most drivers expect.
Why the 14-hour window catches drivers out
The 11-hour limit only counts driving, so it's easy to track. The 14-hour window counts everything: pre-trips, fueling, loading, waiting at a dock, even a meal break off duty. It starts when you come on duty and keeps running no matter what you're doing. Drivers who lose hours usually lose them here, at a shipper that loads three hours late or a receiver with no open doors. Check the window close time before you accept a late appointment, and plan your parking before the window closes, not after.
WHERE THE 14-HOUR WINDOW GOESEXAMPLE
Shipper loads on time
Shipper loads 4 hours late: 4 hours of driving gone
- Docks, fuel, pre-trip
- Driving
- Break
Reading your result
The number that matters is driving left this shift, set against the drive you're planning. Compare it with the time to your next stop plus a margin for traffic, fuel and parking, and you'll know which of these three situations you're in.
GREEN
Room to plan
Several hours left on every clock, with the window closing well after your next stop. You can take the load and still find parking before you run out.
AMBER
Tight
Less than 2 hours between your planned arrival and the binding limit. One closed ramp or slow dock and you're parking short of the stop. Plan the parking spot now.
RED
Out of hours
No driving left under one of the limits. The only fix is time off: 10 consecutive hours for the 11 and the 14, or hours rolling off your cycle or a 34-hour restart for the 60/70.
What changes the math (and isn't in the calculator)
Adverse driving conditions
Unexpected weather or traffic you didn't know about at dispatch can extend the 11 and the 14 by up to 2 hours. It's for conditions you couldn't plan for, not for a late start.
Short-haul exceptions
Drivers who stay within 150 air miles and return within 14 hours may skip the ELD and the 30-minute break, and some can stretch one day a week to 16 hours.
Sleeper-berth splits
A 7/3 or 8/2 split changes where your 14-hour window starts. The qualifying periods don't count against the window.
Pilot programs
FMCSA is testing other sleeper splits and a pause of the 14-hour window with a limited group of enrolled drivers. If you're not enrolled, the standard rules apply.
PILOTS IN EFFECT (2026-10-05): FLEXIBLE SLEEPER BERTH PILOT · SPLIT DUTY PERIOD PILOT. ENROLLED DRIVERS ONLY.
California intrastate drivers
If you drive only within California under the state's rules, your limits are different: up to 12 hours of driving after 10 hours off, no driving after the 16th hour on duty, and no driving after 80 hours on duty in 8 consecutive days, with a 34-hour restart (13 CCR 1212(g) and 1212.5). This calculator uses the federal rules, which apply to interstate drivers, including interstate drivers running in California.
Results are estimates for planning, not legal advice. Your ELD record and the current rules decide what you may do.
Loads planned around the hours you just calculated
Our dispatchers check your clock before offering a load. You confirm every one.
Start dispatchEXAMPLE · 49 CFR 395.3 · checked 2026-10-05