Hours of Service Calculator (70/8 Recap)
Enter your on-duty hours for the last 7 days. See what you have left on the cycle today — and how many hours recap back at midnight.
How this calculator works
Hours available = cycle limit (70 or 60) − on-duty hours in the rolling window (previous 7 days for 70/8, previous 6 for 60/7).
Practical limit today: even with 30 cycle hours available, one shift is still capped at 11 driving hours inside a 14-hour window — the tool shows whichever is smaller.
Recap: at midnight the oldest day falls out of the window and its hours return to your cycle. Planning recaps well is the difference between running steady all week and sitting out a surprise 2-hour day.
Frequently asked questions
How does the 70-hour/8-day rule work?
You may not drive after accumulating 70 on-duty hours in any rolling 8-day window (carriers operating every day of the week). Today’s available hours = 70 minus your on-duty total from the previous 7 days. Each midnight, the oldest day drops off the window and those hours come back — that’s the “recap”.
What is the difference between 70/8 and 60/7?
60/7 (60 hours in 7 days) applies to carriers that do NOT operate every day of the week; 70/8 applies to those that do. Most OTR operations run 70/8. The math is identical — only the cap and window size change.
How does a 34-hour restart work?
34 consecutive hours off-duty resets your rolling total to zero, giving you a fresh 70 (or 60). It is optional — many drivers run on recaps instead of restarting, especially when daily recap hours are healthy.
Does this replace my ELD?
No. Your ELD is the legal record. This is a planning tool: it shows what the week ahead looks like so you can decide whether to run recaps or take a 34 — before you are stuck with a 2-hour day 600 miles from home.
What other limits apply besides the 70?
Daily limits still cap every shift: 11 hours driving, inside a 14-hour on-duty window, with a 30-minute break required after 8 cumulative hours of driving. Your available time today is the smaller of the cycle hours and those daily limits.