Free Resource Center
Enter the ACS codes from your knowledge test report to see each missed topic in plain English, where to study it and a plan to your earliest retest date.
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Flight Weather
Current conditions, the hourly and 7-day forecast, airport reports decoded, and what it all means before you fly. Written for every pilot who reads a METAR, whether the aircraft carries you or you stand on the ground beside it.
Live lookups are not available in this preview, so rather than show you a search box that cannot answer, here are the two official sources pilots actually use. Both are free, both are the government record, and neither is us.
The worked examples below are the teaching half of this page and they do not depend on a connection. They are fixed on purpose, so the same report reads the same way every time you come back to practice it.
These are worked examples, kept fixed so the same report reads the same way every time you practice it. They are not current conditions and never change. For real weather, use the official sources above.
Why this one Cumulonimbus in the report and a Special Weather Statement beside it. The ceiling and visibility are legal; the thunderstorm is the reason not to fly anyway.
Salt Lake City, Utah, KSLC, 12:59 PM MDT
Part 107 and Part 91 are not the same test. The visibility and cloud figures checked here are the Part 107 values in §107.51: 3 statute miles, 500 feet below and 2,000 feet horizontally from cloud, measured from the control station. If you are flying under Part 91 your minimums come from §91.155 and depend on airspace class, altitude and whether it is day or night, so read them there rather than from this panel. Based on the airport report, not your exact site. Airspace rules still apply, and the remote pilot in command decides. Flight categories follow the FAA definitions in AIM 7‑1‑7; the colors follow the convention used on the Aviation Weather Center’s Graphical Forecasts for Aviation, which names the colors but does not publish specific values.
Estimated from surface wind with a standard wind profile. Wind usually strengthens with height.
Computed for this location and today's date.
Higher density altitude means less lift and thrust, and shorter flight times. Open the calculator.
The planetary K-index (0–9) measures geomagnetic activity. Higher values can degrade GPS accuracy, but the effect on your aircraft varies. Treat it as context, not a limit.
Learn from this weather
For study and situational awareness only. This is not a weather briefing. For flight, get an official briefing from Flight Service (1800wxbrief.com) or another approved source. Live data sources: National Weather Service, Aviation Weather Center, NOAA Space Weather Prediction Center. We do not store your location.
Airspace alerts
Temporary flight restrictions and notices to airmen near your location, drawn on a map, translated into plain English and checked against a drone flight. Built to teach how to read them, and useful every time you fly.
These are example TFRs and NOTAMs for each preset city, written to show how real notices read. They are not current. Check the FAA's TFR list and NOTAM Search before every flight.
Still check the official sources below right before you fly. TFRs can be issued with little notice.
What it means: Applies to MLB, NFL, NCAA Division I football and major motor speedway events at venues seating 30,000 or more: 3 NM, up to 3,000 ft AGL, from 1 hour before to 1 hour after the event.
✓ Outside: the edge is 6.0 NM ESE of KSLC. Check again if you fly closer.
Runway 16L/34R closed
Starts in 22 hr Sat, Oct 31 10:00 AM local (1600Z) to Sat, Oct 31 6:00 PM local (0000Z)
For a drone pilot: a closed runway can change where manned traffic flies. Watch for aircraft using the other runways.
Obstacle: tower lighting (antenna structure registration 1206531) 40°45′20″N 111°58′30″W (2.0 nautical miles S SLC) 4,577 ft (350 ft above ground level) unserviceable
Active now Tue, Oct 27 12:00 PM local (1800Z) to Thu, Nov 12 12:00 AM local (0600Z)
For a drone pilot: an obstacle like this can reach close to or above your 400 ft limit. Its height is given both MSL and AGL; compare the AGL figure with your planned altitude.
Service: fuel Jet A not available at fixed-base operator west
Active now Fri, Oct 30 2:00 AM local (0800Z) to Sun, Nov 1 4:00 AM local (1000Z)
Services NOTAMs cover fuel, towers and other facilities at the airport.
Copy one from the FAA's NOTAM Search, or try a sample. Times convert from UTC to local time at the selected airport.
The decoded NOTAM will appear here, with each part labeled.
For study and situational awareness only. This is not a preflight briefing and may not show every restriction. Always get an official briefing or use an FAA-approved app before you fly.
Chart Lab
Tap any symbol to learn it, then test yourself with ten chart questions.
Explore
Airspace boundaries, airports, the obstacle, the restricted area, the MOA and the big blue number each explain themselves. Then switch to the quiz.
A training chart drawn with the FAA's sectional symbols (Aeronautical Chart Users' Guide). The airports and airspace are fictional. For real flights, use the current FAA sectional chart, which the FAA publishes free every 56 days.
Operations Over People
Four questions about your drone, and a clear answer with the rule behind it.
Your result
You will see which categories your drone qualifies for, and where it may fly over people.
The most-missed item on the drone test
78.58%how often knowledge code UA.I.E.K13 is missed, July 2024 to June 2025. The most-missed code on the remote pilot test.
UA.I.E.K13 is the Declaration of Compliance. Here is what it actually is.
A study aid based on 14 CFR Part 107, Subpart D. It does not replace the regulations or your aircraft's documentation.
Missed Codes
Every ACS code on the remote pilot test, in plain English, with a plan to your retest.
Your report lists an ACS code for each topic you missed. Codes stay on this page; nothing is sent anywhere.
How it works
No report handy? Select Try a sample report.
FAA Reference Shelf
The public-domain FAA publications the knowledge tests draw from, sorted into standards, regulations, handbooks and references. We check each edition monthly against the FAA's current release, so you study AC 107-2A and the ACS-10B test standard, not the outdated versions still linked around the web. Select any one to open it in the reader.
What each test measures and the supplement of figures it hands you.
The rules themselves, from Title 14 and Title 49 of the CFR.
The FAA's textbooks, one or more for each certificate.
Advisory circulars, FAA orders, the AIM, the Chart Supplement, the chart guide and the FAA study guide.
Calculators
Live calculators for flight, currency and maintenance math. Change any value and the answer updates, and many show the rule of thumb the test expects, so you learn the method as well as the answer. For study only, not for flight planning or maintenance decisions.
Altitude, airspeed, wind, fuel, weather and daylight.
From field elevation, altimeter setting and temperature.
Rule of thumb: 120 ft of density altitude per °C above standard. Default is a field at 5,000 ft, where summer density altitude matters.
For Remote Pilot + 5 more
Altitude corrected to the standard 29.92 in Hg.
Each 0.01 in Hg below 29.92 adds about 10 ft.
For Remote Pilot + 5 more
Calibrated airspeed corrected for air density.
Standard-atmosphere model. Compare it with the 2% per 1,000 ft rule of thumb.
For Private Pilot + 4 more
Wind components for a runway.
Runway 17 points 170° magnetic. Tower and ATIS winds are magnetic; METAR and TAF winds are true.
For Private Pilot + 4 more
Solve the wind triangle for a course.
Apply magnetic variation and deviation to get compass heading.
For Private Pilot + 4 more
Enter distance and groundspeed.
For Remote Pilot + 5 more
Trip fuel plus the VFR reserve of §91.151.
§91.151 minimums for airplanes. Many pilots plan a larger personal reserve.
For Private Pilot + 4 more
Load factor and stall speed in a level, coordinated turn.
The remote pilot test asks this from its load factor chart. 60° of bank gives 2 G.
For Remote Pilot + 5 more
From the temperature and dewpoint spread.
In unsaturated air, temperature and dewpoint converge about 2.5 °C (4.4 °F) per 1,000 ft.
For Remote Pilot + 5 more
Convert chart altitudes and check Part 107 limits.
Within 400 ft of a structure you may fly up to 400 ft above its top (§107.51(b)). Controlled airspace still needs authorization.
For Remote Pilot
Paste a METAR to read it in plain English.
Ceiling is the lowest broken, overcast or vertical-visibility layer (14 CFR 1.1). Sample report is illustrative.
For Remote Pilot + 5 more
For night and twilight operations.
For Part 107, 14 CFR 1.1 defines civil twilight as the 30 minutes before sunrise and after sunset (outside Alaska). Night is defined from Air Almanac civil twilight, the sun 6° below the horizon. Default: Salt Lake City, Utah, daylight time. Times are approximate.
For Remote Pilot + 5 more
When a certificate, review, medical, inspection or report comes due.
Remote pilots need a passed knowledge test or recurrent training within the previous 24 calendar months.
Calendar months run to the end of the month (§107.65). Recurrent training is free on FAASafety.gov.
For Remote Pilot
A flight review within the previous 24 calendar months (§61.56).
For Private Pilot + 4 more
Three takeoffs and landings in the preceding 90 days (§61.57).
Tailwheel airplanes need full-stop landings for day currency too.
For Private Pilot + 4 more
Six approaches, holding, intercepting and tracking within six calendar months (§61.57(c)).
For Instrument + 3 more
When each class of privilege runs out (§61.23).
BasicMed is a separate option with its own rules.
For Private Pilot + 4 more
Due dates under §91.409.
The 100-hour inspection applies to aircraft carrying people for hire or used for flight instruction for hire. The 100-hour limit may be exceeded by up to 10 hours to reach a place where it can be done.
For Maintenance + 5 more
Report to the FAA within 10 calendar days (§107.9).
Required for serious injury, loss of consciousness or damage over $500 to property other than the drone.
For Remote Pilot
Shop math for the aviation mechanic tests.
Total weight, moment and center of gravity.
| Item | Weight | Arm |
|---|---|---|
Moment = weight × arm. CG = total moment ÷ total weight. Sample aircraft with a single CG range; real aircraft often have a CG envelope that changes with weight, so use your aircraft's own data.
For Maintenance + 3 more
Sheet metal layout for a bend.
BA = (0.01743 R + 0.0078 T) × degrees. SB = K (R + T).
For Maintenance
Enter any two values.
For Maintenance
Between inch-pounds, foot-pounds and newton-meters.
1 N·m = 8.8507 in-lb. 1 ft-lb = 12 in-lb.
For Maintenance
Nearest 64th of an inch.
For Maintenance
Glossary
Each definition is written in plain English, cites the FAA source it comes from, and names the volume and chapter where the term is taught in full.
Showing 16 of 2,368 terms. Search, pick a letter or show all.
Study Articles
Longer explanations of the topics candidates ask about most.
Official Services
These steps can only be done on official systems. Each opens in a new tab, and this page stays open behind it.
Schedule and pay for any FAA knowledge test at a PSI testing center.
For Remote Pilot + 6 more
Open PSI (opens in a new tab)Get your FAA Tracking Number (FTN) before you schedule the test, then apply for your certificate after you pass.
For Remote Pilot + 6 more
Open IACRA (opens in a new tab)Complete free Part 107 recurrent training and WINGS courses.
For Remote Pilot + 5 more
Open FAASafety.gov (opens in a new tab)Register drones and request Part 107 waivers and some airspace authorizations.
For Remote Pilot
Open FAA DroneZone (opens in a new tab)Check where you can fly and get near real-time airspace authorization through FAA-approved apps.
For Remote Pilot
Open B4UFLY and LAANC (opens in a new tab)Start your FAA medical certificate application before seeing an aviation medical examiner.
For Private Pilot + 4 more
Open MedXPress (opens in a new tab)Study on your phoneFree app for your home screen, works offlineFree download
The October 2026 test-change briefing, 20 practice questions and an exam-day checklist.
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