Three FAA Part 117 decision-support calculators, in your browser. Pick one from the menu on the left to get started.
✈️FDP Limit Calculator — maximum Flight Duty Period for augmented or unaugmented operations using Tables B & C, with RAP and acclimation adjustments.
😴30-Hour Calculator — enter a rest period start to find when the crew member is released from their 30-hour mandatory rest.
⏱️138-Hour Duty Window — the latest time a final FDP may begin before a new 30-hour break is required.
Decision-support only. Always verify against current 14 CFR Part 117 and your company's FAA-approved operations specifications.
FAA Part 117 FDP Calculator
Flight Duty Period limit — Tables B & C
Operation Type
Acclimation
If applicable.
Local acclimated time, 24-hour format.
Latest Block-In
Total FDP Length
Limiting Factor
Decision-support only. Always verify against current 14 CFR Part 117
and your company's FAA-approved operations specifications.
30-Hour Calculator
14 CFR Part 117 — calculate when 30 consecutive hours of rest ends
Rest Release (+30 hrs)
Decision-support only. Always verify against current 14 CFR Part 117
and your company's FAA-approved operations specifications.
138-Hour Duty Window
14 CFR Part 117 — latest time a final FDP may begin before a new 30-hour break is required (30 + 138 = 168 hrs)
Enter the sign-in time of the first duty period after the crew member's most recent 30+ hour break — not just any duty start.
Example: pilot finishes a qualifying break and signs in at 07:30 on 24JUN — enter that.
Latest Final FDP Start (+138 hrs)
Decision-support only. Always verify against current 14 CFR Part 117
and your company's FAA-approved operations specifications.
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