Average speed calculator

I want to calculate
Initial velocity (v0) = m/s
Speed ​​(v) = m/s
Average speed (va) = m/s
 

Average speed is a quantity that describes the average speed of an object's movement. It roughly indicates how fast an object moves over a period of time.

Average speed formula

Average speed: va = ½ (v0 + v)
Initial velocity: v0 = 2xva - v
Speed: v = 2xva - v0