Online True Airspeed Calculator

An airplane's true airspeed can be calculated using the true airspeed calculator. You could wonder, what is genuine airspeed? Air travel has grown in importance around the world since the Wright-inaugural Flyer's flight in 1903. True airspeed is one of several new ideas introduced by advancements in aeronautical engineering technology.

Online True Airspeed Calculator: There is a distinction between how rapidly an airplane travels through the air (true airspeed) and how quickly it travels overground. For pilots, understanding how to determine the correct airspeed is crucial. Continue reading for more information on how to calculate true airspeed and a look at the different true airspeed calculations.

What is True Airspeed?

True airspeed is defined as the speed at which an airplane flies in relation to the air it is in. Planes frequently fly at high altitudes, when the air density is substantially lower. This lowers the airplane's air resistance/drag, which may result in less fuel being used to accomplish the voyage than at a lower altitude. True airspeed is also crucial for an aircraft's precise navigation.

In the past, true airspeed was determined indirectly by using an airspeed indicator, but GPS has rendered such measurements obsolete. Indicated Airspeed (or IAS) is now used by most aircraft (calculated directly from an airspeed indicator). This is because the IAS provides a more accurate indicator of the amount of power consumed and available lift.

How do I Calculate True Airspeed?

Now that we know what genuine airspeed is, we can go on to the next step of learning how to calculate it. We'll use a different TAS formula depending on the information we have. The following are some of them:

The first TAS formula uses a rule-of-thumb approximation based solely on the airplane's altitude.

TAS = (IAS * OAT * A / 1000) + IAS


OAT - Outside Air Temperature correction

A - Altitude of the airplane

TAS & IAS - True airspeed and indicated airspeed

This is a true airspeed to ground speed calculator thanks to the second true airspeed formula:

GS = TAS + W * cos θ


GS - Ground speed

W - Wind speed

θ - Angle between wind direction and aircraft motion.

The third approach calculates true airspeed using altimeter settings, altitude, and calibrated airspeed (CAS) or indicated airspeed (IAS). We use the genuine airspeed formulas published in Ed Williams' Aviation Formulary.

The aircraft's Mach number, pressure altitude (equivalent height according to ISA - International Standard Atmosphere), and density altitude are all calculated using this method (ISA defines atmospheric region based on temperature and pressure).

Click on to to check all the physics concepts which gives instant results.

FAQs on True Airspeed Calculator

1. What is true speed?

An aircraft's true airspeed (TAS; also KTAS, for knots true airspeed) is its speed relative to the air mass through which it is flying.

2. What is the distinction between IAS and TAS?

TAS is the aircraft's actual speed through the air. The pitot measures pressure, due to the decrease in density, this pressure fluctuates with altitude. TAS Equals IAS in ordinary conditions at MSL (Mean sea level), however, this varies as you gain altitude.

3. How is the TAS rule of thumb determined?

The TAS value is shown immediately on the Electronic Flight Instrument System using an Air Data Computer. For every 1000 feet of height, add 2% to the measured airspeed.

4. What is the difference between indicated airspeed and true airspeed?

The airspeed indicator displays the indicated airspeed. Airspeed corrected for location installation mistake is shown as calibrated airspeed. Equivalent Airspeed refers to the compressed airspeed that has been calibrated. True Airspeed is equal airspeed adjusted for temperature and altitude pressure.