Operational aids

Tools

Calculators that work the published limits for you, showing their reasoning so you can check it.

FDP calculatorUK Reg 965/2012 ORO.FTLMaximum Flight Duty Period and latest take-off time, with the paragraph behind every figure.
Break calculatorUK Reg 965/2012 ORO.FTLDivides the in-flight rest window between three or four pilots and checks each break against the published minimums.
US tarmac delay14 CFR 259.4Runs the two regulatory clocks, prompts each duty as it falls due and builds a copy-ready tarmac delay report from your timestamped actions.
Runway exitsOurAirports / OSMMark your own calculated landing distance against a runway's named exits, so you know which one to plan for. Does not calculate landing performance - bring that from your own performance app.