How to calculate air velocity from wire resistance? I want to construct a constant current hot wire anemometer. For this, resistance is the input of the Arduino. There is a relationship between wire resistance and air velocity. 

How can I calculate velocity from wire resistance?
Its very simple really, all you need to do is code the equations on this page and then supply some heat and you will be able to do it.  Just remember integer division rounds down :)

http://www-g.eng.cam.ac.uk/whittle/current-research/hph/hot-wire/hot-wire.html