Movement speed

The Movement Speed affects the rate at which a champion travels across a map. One movement speed point translates to one game distance unit traveled per second (as a frame of reference, Annie’s basic attack has a range of 625 game distance units). Each Champion begins the game with a particular base move speed. That base move speed can be increased in several ways.

Direct movement speed bonus
A champion can obtain one of the following direct movement speed bonuses by purchasing boots from the shop. These effects are unique, meaning that if a champion has more than one direct bonus to their movement speed, they will only receive the highest bonus.
 * Movement Speed 1 increases the movement speed of a champion by 50.
 * Movement Speed 2 increases the movement speed of a champion by 70.
 * Movement Speed 3 increases the movement speed of a champion by 90.
 * Movement Speed 5 increases the movement speed of a champion by 130.

Percentage bonuses to movement speed
Increases the movement speed of a champion by adding a percentage of their base move speed. Any direct movement speed bonuses a champion obtains are applied after bonuses of this type have been calculated

Diminishing returns on movement speed
Any movement speed bonuses that would cause a champion's movement speed to exceed 400 are reduced by 20%. Any movement speed bonuses that would cause a champion's movement speed to exceed 475 are reduced by 50%.