HOS Calculator
Check your remaining drive time under FMCSA Hours of Service rules.
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
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This calculator helps you quickly check your remaining available drive time under FMCSA Hours of Service regulations for property-carrying drivers. It applies the 11-hour driving limit, 14-hour on-duty window, 30-minute break requirement, and 60/70-hour weekly limit.
- Enter hours driven today. This is your actual driving time since your last 10-hour off-duty period. Do not include non-driving on-duty time.
- Enter hours on duty today. This includes driving time plus any time you were on duty but not driving (fueling, inspections, loading, waiting at docks).
- Enter weekly hours. Your cumulative on-duty hours over the past 7 or 8 days (depending on your cycle).
- Select your cycle. Check the 70-hour/8-day box if your carrier operates vehicles every day of the week. Leave unchecked for the 60-hour/7-day cycle.
The result shows your most restrictive remaining time, the binding limit from the 11-hour, 14-hour, and weekly rules combined.
About the HOS Calculator
FMCSA Hours of Service rules exist to prevent fatigued driving. Property-carrying drivers may drive a maximum of 11 hours after 10 consecutive hours off duty, and cannot drive beyond the 14th consecutive hour after coming on duty. A 30-minute rest break is required after 8 hours of consecutive driving. The weekly cap is either 60 hours in 7 days or 70 hours in 8 days. Violations carry significant fines and can result in driver disqualification. This calculator does not replace a properly maintained log or ELD but helps you estimate remaining time at a glance.
Frequently Asked Questions
What is the 11-hour driving rule?
Under FMCSA regulations, a property-carrying driver may drive a maximum of 11 hours after taking 10 consecutive hours off duty. This is a hard limit. Once you have driven 11 hours, you must take a full 10-hour off-duty break before driving again, regardless of how much time remains in your 14-hour on-duty window.
What is the difference between the 60-hour and 70-hour rules?
The 60-hour/7-day rule applies to carriers that do not operate every day of the week. The 70-hour/8-day rule applies to carriers that do operate every day. Both rules limit total on-duty hours over the rolling cycle. Drivers can use the 34-hour restart provision to reset the cycle by taking 34 consecutive hours off duty.
When is the 30-minute break required?
Drivers must take a 30-minute break after 8 hours of consecutive driving. The break can be off-duty time or sleeper berth time. Time spent on duty but not driving (waiting at a dock, for example) does not interrupt the 8-hour driving clock that triggers the break requirement.
Does the 14-hour clock stop during breaks?
No. The 14-hour on-duty window starts when you come on duty and runs continuously until you take 10 consecutive hours off. It cannot be paused by rest breaks during the day. Even if you only drive 2 hours and spend the rest waiting, the 14-hour clock keeps running. This is why managing your start time is critical, especially on longer runs.