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API
sim.tools API is free to use for all. An API key is required and may be obtained using a form under the examples. By default, quota for all new keys is 500 GET requests per day, but I will be happy to increase it for good use if you get in touch.
API responds in JSON format to GET requests, as seen in examples below. If a request produces erroneous output, a single error element will be returned, explaining the error.
This section is pretty self-explanatory and is a quick way to convert a multitude of units of speed, distance, pressure, temperature, weight and aviation fuel units. Fuel conversion assumes ISA temperature when converting between volume and weight units.
Speed
kts
kph
mph
m/s
ft/m
Distance
ft
nm
sm
km
Fuel
lbs
kg
lt
USG
Pressure
hPa
in. hg
mm. hg
Temperature
°C
°F
°K
Weight
lb
kg
Climb/Descent
Upon entering all values, distance and time required to perform a climb or descent is calculated. This calculator requires indicated airspeed to be entered and calculates ground speed at multiple points during the climb/descent to give a very accurate result. Tailwind is expressed as negative values (i.e. -15 is a 15 knot tailwind).
Start Altitude
ft
Target Altitude
ft
IAS
kts
V/S
ft/m
Head/tailwind
kts
Distance: 118 nm, 219 km
Time: 0h 18m 50s
G/S at Start Altitude: 463 kts
G/S at Target Altitude: 296 kts
Fixed angle climb/descent
Calculates distance required to descend between start and target altitudes, following a fixed angle (FPA).
Start Altitude
ft
Target Altitude
ft
Angle
°
Distance: 107 nm, 198 km
Turns
Given a bank angle, true airspeed and a required angle to turn enroute, produces multiple turn parameters such as turn radius (for easier compliance with specific turn radius requirements in departure/arrival procedures, for example), and distance at which to start a turn before a waypoint.
Bank Angle
deg
True Airspeed
kts
Angle to Turn
deg
G-force: 1.1
Turn radius: 1.96 nm, 3.63 km
Time to turn: 0m 45s
Distance to turn: 1.96 nm, 3.63 km
Conditions and forecast
Produces latest available METAR and TAF reports for given ICAO codes, and contains decoded METAR data as well as other information in the "Extra" section.
Runways highlighted in green have the strongest headwind and weakest crosswind components, optimal for takeoffs and landings.
Please enter at least one ICAO code.
Wind component
Supplied with wind speed, as well as angle between wind direction and direction of travel (such as runway heading or enroute course), calculates crosswind and headwind components. Tailwind is expressed as negative headwind values.
If TAS is supplied, ground speed and wind correction angle are calculated as well.
Note: METARs provide wind direction in relation to true north, not magnetic.
Note: Wind correction angle calculation unreliable when wind speed is close to TAS, or exceeds it. But you shouldn't fly in such conditions anyway!
Wind Angle
deg
Wind Speed
kts
True Airspeed
kts
Crosswind: 8.6 kts
Headwind: 12.3 kts
Ground speed: 238 kts
Wind correction: 2.1 deg
International Standard Atmosphere
Given the desired altitude, a value of ISA temperature is calculated for that altitude.
Factual/forecast temperature may be supplied for the same altitude to calculate ISA deviation, as well as local speed of sound and density altitude.
If TAS value is supplied, mach number is calculated for given altitude and temperature.
Altitude
ft
Temperature
°C
TAS
kts
ISA temperature: -48 °C
ISA deviation: +3 °C
Speed of sound: 304 m/s, 591 kts
Density altitude: 32356 ft
Mach number: M 0.76
QFE
Altimeters set to QFE pressure produce altitude above airport elevation, as opposed to QNH which produces altitude above mean sea level. QFE pressure is produced from QNH pressure and airport elevation.
QNH
hPa
QNH
in. hg
QNH
mm. hg
Elevation
ft
Elevation
m
QFE: 994.69 hPa, 29.37 in. hg, 746.08 mm. hg
General information
Produces basic information for a given ICAO code. FAA charts are also listed for US airports.
Please enter an ICAO code.
NOTAMs
This section is self explanatory, and produces a list of current NOTAMS for a given ICAO code.
Please enter an ICAO code.
Checklists
A collection of real-world airline or manufacturer checklists. Easy to keep up with, since clicking on an item highlights it in green. If you have other checklists (only from airline or aircraft manufacturer sources), please get in touch and they will be added!
Airlines and Aircraft
An extensive (although probably limited) database of airline codes, names, callsigns, as well as aircraft ICAO codes. Useful for choosing proper aircraft codes for online flying.
Airline DB
Search results
Aircraft type DB
Search results
Route DB
Routes may be search by entering either destination or arrival ICAO codes, or both. Airplane symbol allows to plot the route in the Route Plotter below. All routes not marked as "User submitted" are real-world airline routes.
Please enter at least one ICAO code.
From
To
Route
Distance
Remarks
Plot
Route plotter and fuel planner
Any entered route is validated against current AIRAC cycle for validity, and in case a route is VALID and not in the Route DB already, it is possible to submit it to the Route DB.
Fuel planner is in beta and may sometimes produce strange results. Values such as MTOW/MLDW/MZFW may be slightly incorrect on some airplanes, but should not significantly affect fuel calculations.
Navigation log
kts
Waypoint
Airway
EET
TC
MC
Leg
DBO
DTG
Name
Frequency
Lat/Lon
Fuel planner
Fuel planner is in beta. If possible, please report any erroneous results. Local FL rules are not supported yet, planner assumes east/west RVSM rules. More aircraft types as well as improvements to existing coming soon!