Pilot & CFI utilities.
Small, focused tools we built because we needed them ourselves. Free to use, no signup, no tracking. If you find yourself reaching for one of these every week, you'll love Trim.
METAR Decoder
Paste a raw METAR and get a clean human-readable breakdown of wind, visibility, ceiling, weather phenomena, temp/dewpoint, and altimeter.
Open tool →Endorsement Lookup
Searchable index of AC 61-65K endorsements. Filterable by category (pre-solo / cross-country / additional aircraft / reviews / tests / instructor track). Tells you which endorsement you need; the verbatim text always comes from the official FAA AC.
Open tool →Currency Calculator
Enter your last flight review, medical, day/night landings, IFR approach. Get an at-a-glance status panel of what's current and what expires when, per 14 CFR Part 61.
Open tool →Weight & Balance
Universal W&B engine. Enter your POH numbers — empty weight, arms, envelope corners — and we'll do the moment math + plot your point against the envelope. No hardcoded aircraft data.
Open tool →Density Altitude
Pressure altitude + density altitude + ISA spread + takeoff-distance penalty. Pilot rule-of-thumb formulas. Optional humidity advisory from dewpoint.
Open tool →Crosswind Component
Wind direction + speed + runway → headwind/tailwind + crosswind components. Pure trig, real-time SVG diagram, signed angles handled correctly across the 0/360° wrap.
Open tool →Top of Descent
Current alt + target alt + ground speed + descent rate → distance to TOD + descent angle. 3°-rule sanity check included.
Open tool →Holding Entry
Inbound course + aircraft heading + turn direction → Direct / Teardrop / Parallel entry. Inline SVG diagram. Right and left turns both supported.
Open tool →Wind Correction Angle
True course + TAS + wind → wind correction angle, true heading, and groundspeed. Classic E6B wind triangle with an inline SVG diagram. Flags 'cannot maintain course' when the perpendicular wind exceeds TAS.
Open tool →True Airspeed
Calibrated airspeed + pressure altitude + OAT → true airspeed. Precise density-ratio formula and the 2% rule-of-thumb side by side, with Mach number above FL180.
Open tool →Unit Converter
Aviation unit converter — distance (nm/sm/km/ft/m), speed (kt/mph/km/h/m/s), weight (lb/kg), volume (US gal/L/imp gal), temperature (°C/°F/K), and fuel (volume ↔ weight at 100LL 6.01 lb/gal or Jet-A 6.7 lb/gal). FAA-standard factors.
Open tool →VFR Minimums
Airspace class + altitude + day/night → required flight visibility and cloud clearance. The 14 CFR §91.155 table, looked up for you. Verbatim FAA values with citations and a full color-coded reference table.
Open tool →Stall Speed at Bank
Published 1G stall speed + bank angle → accelerated stall, load factor, turn radius, and rate of turn. The math behind steep turns, lazy eights, and chandelles, straight from the FAA Airplane Flying Handbook. 14 CFR §91.307(c) over-bank flag included.
Open tool →Magnetic Variation
True ↔ Magnetic ↔ Compass converter. Enter the variation from the sectional's dashed magenta isogonic line and convert headings in either direction. Optional compass-card deviation step for the full chain. East is least, west is best.
Open tool →Climb Gradient
60-to-1 rule calculator — required climb gradient (ft/nm) + ground speed → required vertical speed (fpm). Reverse direction supported. Climb angle, percent grade, and a performance advisory band. ODP, SID, and obstacle-clearance planning made trivial.
Open tool →Fuel Planning
Cross-country fuel planner — taxi + climb + cruise + reserve + (optional) alternate → required gallons. VFR day, VFR night, and IFR reserves per 14 CFR §91.151 / §91.167. Add usable tanks for a safe / caution / marginal / NOGO verdict.
Open tool →Checkride Checklist
Day-of document checklist for Private ASEL · Instrument · Commercial ASEL · CFI Initial · CFII Add-on. Identification, application, knowledge-test results, logbook/experience, endorsements, aircraft documents, aircraft currency — every item with its 14 CFR / AC 61-65K citation. Printable. CFIs hand it to students at the prep lesson.
Open tool →Need a tool we don't have?
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