Crew Rest Requirement Calculator
Minimum rest before the next duty under FAR 117, EASA FTL or DGCA rules — from today's duty and flight time.
Rest rules differ by regime: FAR 117.25 requires a 10-hour rest opportunity (8 uninterrupted sleep); EASA ORO.FTL.235 at least the preceding duty or 12 h at home base (10 away); DGCA scales rest to flight time with a 12-hour floor.
Baselines: FAR 117.25's 10-hour rest opportunity; EASA home-base 12 h / max(preceding duty); DGCA 12 h / 2× flight time. Reduced-rest provisions, time-zone rules and operator schemes modify — the rule text governs.
With your numbers: After a 11-hour duty with 7 flight hours under FAA (Part 117), minimum rest is 10 — earliest report 10 after release.
⚠️ Not for operational decisions. This is a record-keeping and planning aid only — not certified avionics, not a source of regulatory truth. Always verify against official sources (FAA/EASA/DGCA) and your operator's approved documents before flying.
Free crew rest calculator across FAR 117, EASA FTL and DGCA: duty and flight time in, minimum rest and earliest report out — the arithmetic that runs from ACTUAL release, not the schedule.
About Crew Rest Requirement Calculator
Rest rules are where duty regulation grows teeth, and all three major regimes share one operational truth: the clock runs from actual release, so today's delay moves tomorrow's earliest report — the recalculation crews do in the van to the hotel. This calculator does it for the three regimes' baselines: FAR 117.25's 10-hour rest opportunity (with 8 hours of uninterrupted sleep opportunity — the rule that ended reduced-rest scheduling in US 121), EASA's at-least-the-preceding-duty logic with 12-hour home-base and 10-hour out-of-base floors, and DGCA's flight-time-scaled rest with its 12-hour floor. Each regime layers specifics on top — travel time treatment, suitable accommodation standards, time-zone-crossing additives, and the disruptive-schedule rules — which belong to the rule text and your ops manual. The baseline arithmetic here is the universal first check: am I legal to report when crew scheduling thinks I am?
How to use Crew Rest Requirement Calculator
- 1Pick the regime and enter the duty just completed.
- 2Read minimum rest and earliest report after release.
- 3Compare against crew scheduling's plan; the stricter number wins.
Why use Crew Rest Requirement Calculator?
- ✓Three regimes in one tool: FAR 117, EASA FTL, DGCA
- ✓Runs from actual duty performed — the delay-day recalculation
- ✓Earliest-report output answers the question crews actually ask
- ✓Regime differences visible side by side
- ✓Instant, free, browser-only
Frequently asked questions
What does FAR 117's '10-hour rest opportunity' actually mean?+
A 10-hour period free of duty, within which the rule requires an 8-hour uninterrupted SLEEP opportunity — and the pilot has an affirmative obligation (117.5's fitness-for-duty) to report un-rested if travel, hotel or noise reality made sleep impossible. The 'opportunity' framing matters: a 10-hour gap consumed by a 90-minute hotel commute each way fails the sleep-opportunity test even though the clock arithmetic passes, and the rule explicitly contemplates that conversation.
How does rest interact with time-zone crossing?+
Every regime adds protection: EASA's scheme extends rest after significant time-zone displacement (and tracks acclimatisation state for the next duty's limits), FAR 117 handles it through theatre/acclimation rules feeding Table B reductions, and operator schemes add their own additives. The pattern: eastward red-eyes and multi-zone rotations earn more than baseline rest, computed per the scheme's tables. This calculator's baseline is the floor; rotation patterns owe more.
Can rest be reduced below the baseline?+
Only through each regime's narrow, compensated provisions: EASA permits reduced rest under approved FRM-supported schemes with strict caps and subsequent-rest paybacks; DGCA's scheme similarly constrains reductions; FAR 117 deliberately killed routine reduced rest for flight crew. Every reduction path requires operator approval architecture, not crew-room agreement — if a roster shows less than this calculator's baseline without an approved scheme behind it, the roster is the problem.
What happens to my entries if I clear my browser?+
Clearing site data deletes locally stored entries — that's the price of a genuinely private, server-free design. Protect yourself with the one-click CSV download before any cleanup, OS reinstall or device change: re-importing history later beats reconstructing it from memory.
Can I get my data out if I switch systems later?+
Always — the CSV export is a complete, lossless dump of your rest computation, generated locally in one click. Import it into commercial software, archive it with your files, or post-process it in a spreadsheet. No lock-in is deliberate: data you can't take with you isn't really yours.
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