# What is the difference between ground speed and airspeed? [duplicate]

What is difference between ground speed and airspeed? Is ground speed used only for takeoff or is it used for flight too?

• Snarky answer: it's literally the magnitude of the component of the wind speed in the direction of travel. Mar 4, 2016 at 22:10
• Not a duplicate... the referenced question is asking about a video game, and got an answer with more formulas than a college level Aero course. This question is asking for a straightforward answer to the concepts of airspeed and groundspeed, and aviation.se doesn't have that -- at least not in the referenced "duplicate" question. Voting to reopen.
– Ralph J
Mar 4, 2016 at 22:25
• You are headed east at an indicated 100mph, the air mass you are in is headed west at 10mph, your indicated air speed will be 100mph, the ground speed will be 90mph since you have a 10mph head wind. If the air mass were heading east (tail wind) at 10mph, your indicated airspeed would still be 100mph, but your ground speed would increase to 110mph. Make sense? Mar 4, 2016 at 22:52
• GPS speed is the same as Ground speed. The "Flight Simulator" video game question and answers are also applicable to real life so the question has been answered correctly. I vote to remain closed. Mar 4, 2016 at 23:16